android系统中有一个例外classcast同时使用所有MyApplication类 [英] Having a classcast exception in android while using MyApplication class

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问题描述

我在做什么 ::我想使用所有MyApplication类将数据发送到下一个活动。

的问题,我现在面临 ::有类转换异常

BLD_IndividualListOfItems_Starters.java

 公共类BLD_IndividualListOfItems_Starters延伸活动{
    //声明变量
        的JSONObject的JSONObject;
        JSONArray jsonarray;
        ListView控件列表视图;
        ListViewAdapterForAtomicListItemtype适配器;
        ProgressDialog mProgressDialog;
        ArrayList的<&HashMap的LT;字符串,字符串>> ArrayList的;
        静态字符串NAME =等级;
        按钮BTN;        串TYPE_FILTER;        StringBuilder的结果;
        所有MyApplication mApplication;        @覆盖
        公共无效的onCreate(捆绑savedInstanceState){            super.onCreate(savedInstanceState);            mApplication =(所有MyApplication)getApplication();
            //从listview_main.xml视图
            的setContentView(R.layout.listview_main);            TYPE_FILTER = getIntent()getExtras()的getString(key_title)。。
            Log.v(----价值开始---,TYPE_FILTER);
            //定位listview_main.xml列表视图
            列表视图=(ListView控件)findViewById(R.id.listview);            BTN =(按钮)findViewById(R.id.button1);
            btn.setOnClickListener(新OnClickListener(){                @覆盖
                公共无效的onClick(视图v){
                    // TODO自动生成方法存根                    结果=新的StringBuilder();
                    的for(int i = 0; I< arraylist.size();我++){
                        如果(adapter.mysparse.get(我)==真){                            result.append(arraylist.get(I)获得(BLD_IndividualListOfItems_Starters.NAME));
                            result.append(\\ n);
                        }                    }
                    意图N =新意图(BLD_IndividualListOfItems_Starters.this,ResultActivity.class);
                    n.putExtra(缓冲,result.toString());
                    startActivity(N);
                }
            });            //执行DownloadJSON的AsyncTask
            新DownloadJSON()执行();
        }        // DownloadJSON的AsyncTask
        私有类DownloadJSON扩展的AsyncTask<太虚,太虚,太虚> {            @覆盖
            在preExecute保护无效(){
                super.on preExecute();
                //创建一个progressdialog
                mProgressDialog =新ProgressDialog(BLD_IndividualListOfItems_Starters.this);
                //设置progressdialog称号
                //mProgressDialog.setTitle(\"Fetching信息);
                //设置progressdialog消息
                mProgressDialog.setMessage(正在加载...);
                mProgressDialog.setIndeterminate(假);
                //显示progressdialog
                mProgressDialog.show();
            }            @覆盖
            保护无效doInBackground(虚空...... PARAMS){
                //创建一个数组
                ArrayList的=新的ArrayList<&HashMap的LT;字符串,字符串>>();                字符串NEWURL =? +键=+ TYPE_FILTER;
                //从给定的URL地址JSON对象
                的JSONObject = JSONfunctions.getJSONfromURL(http://54.218.73.244:7005/RestaurantAtomicListItemType/+ NEWURL);                尝试{
                    //找到在JSON数组名
                    jsonarray = jsonobject.getJSONArray(餐馆);                    的for(int i = 0; I< jsonarray.length();我++){
                        HashMap的<字符串,字符串>地图=新的HashMap<字符串,字符串>();
                        的JSONObject = jsonarray.getJSONObject(ⅰ);
                        // Retrive JSON对象
                        map.put(BLD_IndividualListOfItems_Starters.NAME,jsonobject.getString(MasterListMenuName));                        //设置JSON对象到数组
                        arraylist.add(地图);
                    }
                }赶上(JSONException E){
                    Log.e(错误,e.getMessage());
                    e.printStackTrace();
                }
                返回null;
            }            @覆盖
            保护无效onPostExecute(无效参数){
                //将结果传递到ListViewAdapter.java
                适配器=新ListViewAdapterForAtomicListItemtype(BLD_IndividualListOfItems_Starters.this,ArrayList的);
                //适配器设置到ListView                mApplication.setArrayListMapData(数组列表);                listview.setAdapter(适配器);
                //关闭progressdialog
                mProgressDialog.dismiss();
            }
        }
    }

ResultActivity.java

 公共类ResultActivity扩展ListActivity {    ListView的lstView;
    ArrayList的<&HashMap的LT;字符串,字符串>> ArrayList的=新的ArrayList<&HashMap的LT;字符串,字符串>>();
    串MYNAME;
    所有MyApplication mApplication;    @覆盖
    保护无效的onCreate(捆绑savedInstanceState){        super.onCreate(savedInstanceState);
        的for(int i = 0;我小于10;我++)
        {
            HashMap的<字符串,字符串>地图=新的HashMap<字符串,字符串>();
            map.put(键,值+ I);
            arraylist.add(地图);        }        的String [] =从{钥匙};
        INT []为= {} R.id.textView1;
        SimpleAdapter适配器=新SimpleAdapter(这一点,ArrayList中,R.layout.custom_single_list,从,到);
        setListAdapter(适配器);    }}

清单

 <?XML版本=1.0编码=UTF-8&GT?;
<清单的xmlns:机器人=htt​​p://schemas.android.com/apk/res/android
    包=com.example.multitabcheckboxselection
    安卓版code =1
    机器人:=的versionName1.0>    <用途-SDK
        安卓的minSdkVersion =8
        机器人:targetSdkVersion =18/>    <使用许可权的android:NAME =android.permission.INTERNET对/>    <应用
        机器人:allowBackup =真
        机器人:图标=@绘制/ ic_launcher
        机器人:标签=@字符串/ APP_NAME
        机器人:主题=@风格/ AppTheme>
        <活动
            机器人:名字=com.example.multitabcheckboxselection.BreakfastLunchDinnerIndividualListOfItems
            机器人:标签=@字符串/ APP_NAME>
            &所述;意图滤光器>
                <作用机器人:名字=android.intent.action.MAIN/>                <类机器人:名字=android.intent.category.LAUNCHER/>
            &所述; /意图滤光器>
        < /活性GT;
        <活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters/>
        <活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_MainCourse/>
        <活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_SideCourse/>
        <活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Others/>
        <活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Desert/>
        <活动机器人:名字=com.example.multitabcheckboxselection.ResultActivity/>
    < /用途>
    <应用
        机器人:名字=com.android.app.MyApplication
        机器人:图标=@绘制/ ic_launcher
        机器人:标签=@字符串/ APP_NAME>
    < /用途>< /清单>

ListViewAdapterForAtomicListItemtype.java

 公共类ListViewAdapterForAtomicListItemtype扩展BaseAdapter实现OnCheckedChangeListener {    //声明变量
    上下文语境;
    LayoutInflater吹气;
    ArrayList的<&HashMap的LT;字符串,字符串>>数据;
    HashMap的<字符串,字符串> resultp =新的HashMap<字符串,字符串>();
    SparseBooleanArray mysparse;    公共ListViewAdapterForAtomicListItemtype(上下文的背景下,
            ArrayList的<&HashMap的LT;字符串,字符串>>数组列表){
        this.context =背景;
        数据=数组列表;
        mysparse =新SparseBooleanArray(data.size());
    }    @覆盖
    公众诠释的getCount(){
        返回data.size();
    }    @覆盖
    公共对象的getItem(INT位置){
        返回null;
    }    @覆盖
    众长getItemId(INT位置){
        返回0;
    }    公共查看getView(最终诠释的立场,观点convertView,父母的ViewGroup){
        //声明变量
        TextView的名称;
        复选框CHK;        吹气=(LayoutInflater)上下文
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);        查看ItemView控件= inflater.inflate(R.layout.listview_item_for_atomic_list_item_type,父母,假);
        //获取位置
        resultp = data.get(位置);        //定位listview_item.xml的TextViews
        名字=(TextView中)itemView.findViewById(R.id.textView_id_atomic_list_item_type);
        CHK =(复选框)itemView.findViewById(R.id.checkBox_atomic_list_item_type_id);
        //捕捉位置,并设置结果向TextViews
        name.setText(resultp.get(BLD_IndividualListOfItems_Starters.NAME));        chk.setTag(位置);
        chk.setChecked(mysparse.get(位置,FALSE));
        chk.setOnCheckedChangeListener(本);        返回ItemView控件;
    }    公共布尔器isChecked(INT位置){
        返回mysparse.get(位置,FALSE);
    }    公共无效setChecked(INT位置,布尔器isChecked){
        mysparse.put(位置,器isChecked);    }    公共无效切换(INT位置){
        setChecked(位置,器isChecked(位置)!);    }    @覆盖
    公共无效onCheckedChanged(CompoundButton buttonView,布尔器isChecked){
        // TODO自动生成方法存根
        mysparse.put((整数)buttonView.getTag(),器isChecked);
    }
}

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  13 01-03:30:​​12.828:D / AndroidRuntime(461):关闭VM
01-03 13:30:​​12.828:W / dalvikvm(461):主题ID = 1:螺纹未捕获的异常退出(组= 0x4001d800)
01-03 13:30:​​12.868:E / AndroidRuntime(461):致命异常:主要
01-03 13:30:​​12.868:E / AndroidRuntime(461):了java.lang.RuntimeException:无法启动活动ComponentInfo{com.example.multitabcheckboxselection/com.example.multitabcheckboxselection.BreakfastLunchDinnerIndividualListOfItems}:了java.lang.RuntimeException:无法启动活动ComponentInfo{com.example.multitabcheckboxselection/com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters}: java.lang.ClassCastException:android.app.Application
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.app.ActivityThread.access $ 2300(ActivityThread.java:125)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:2033)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.os.Handler.dispatchMessage(Handler.java:99)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.os.Looper.loop(Looper.java:123)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.app.ActivityThread.main(ActivityThread.java:4627)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在java.lang.reflect.Method.invokeNative(本机方法)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在java.lang.reflect.Method.invoke(Method.java:521)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:868)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在dalvik.system.NativeStart.main(本机方法)
01-03 13:30:​​12.868:E / AndroidRuntime(461):了java.lang.RuntimeException:产生的原因无法启动活动ComponentInfo{com.example.multitabcheckboxselection/com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters}: java.lang.ClassCastException:android.app.Application
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.app.ActivityThread.startActivityNow(ActivityThread.java:2503)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.widget.TabHost $ IntentContentStrategy.getContentView(TabHost.java:651)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.widget.TabHost.setCurrentTab(TabHost.java:323)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.widget.TabHost.addTab(TabHost.java:213)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在com.example.multitabcheckboxselection.BreakfastLunchDinnerIndividualListOfItems.onCreate(BreakfastLunchDinnerIndividualListOfItems.java:36)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
01-03 13:30:​​12.868:E / AndroidRuntime(461):11 ...更多
01-03 13:30:​​12.868:E / AndroidRuntime(461):java.lang.ClassCastException:产生的原因android.app.Application
01-03 13:30:​​12.868:E / AndroidRuntime(461):在com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters.onCreate(BLD_IndividualListOfItems_Starters.java:47)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-03 13:30:​​12.868:E / AndroidRuntime(461):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
01-03 13:30:​​12.868:E / AndroidRuntime(461):20 ...更多
01-03 13:30:​​15.563:I /流程(461):发送信号。 PID:461 SIG:9


{编辑}

BLD_IndividualListOfItems_Starters.java

 公共类BLD_IndividualListOfItems_Starters延伸活动{
    //声明变量
        的JSONObject的JSONObject;
        JSONArray jsonarray;
        ListView控件列表视图;
        ListViewAdapterForAtomicListItemtype适配器;
        ProgressDialog mProgressDialog;
        ArrayList的<&HashMap的LT;字符串,字符串>> ArrayList的;
        静态字符串NAME =等级;
        按钮BTN;        串TYPE_FILTER;        StringBuilder的结果;
        所有MyApplication mApplication;        @覆盖
        公共无效的onCreate(捆绑savedInstanceState){            super.onCreate(savedInstanceState);            mApplication =(所有MyApplication)getApplicationContext();
            //从listview_main.xml视图
            的setContentView(R.layout.listview_main);            TYPE_FILTER = getIntent()getExtras()的getString(key_title)。。
            Log.v(----价值开始---,TYPE_FILTER);
            //定位listview_main.xml列表视图
            列表视图=(ListView控件)findViewById(R.id.listview);            BTN =(按钮)findViewById(R.id.button1);
            btn.setOnClickListener(新OnClickListener(){                @覆盖
                公共无效的onClick(视图v){
                    // TODO自动生成方法存根                    结果=新的StringBuilder();
                    的for(int i = 0; I< arraylist.size();我++){
                        如果(adapter.mysparse.get(我)==真){                            result.append(arraylist.get(I)获得(BLD_IndividualListOfItems_Starters.NAME));
                            result.append(\\ n);
                        }                    }
                    意图N =新意图(BLD_IndividualListOfItems_Starters.this,ResultActivity.class);
                    n.putExtra(缓冲,result.toString());
                    startActivity(N);
                }
            });            //执行DownloadJSON的AsyncTask
            新DownloadJSON()执行();
        }        // DownloadJSON的AsyncTask
        私有类DownloadJSON扩展的AsyncTask<太虚,太虚,太虚> {            @覆盖
            在preExecute保护无效(){
                super.on preExecute();
                //创建一个progressdialog
                mProgressDialog =新ProgressDialog(BLD_IndividualListOfItems_Starters.this);
                //设置progressdialog称号
                //mProgressDialog.setTitle(\"Fetching信息);
                //设置progressdialog消息
                mProgressDialog.setMessage(正在加载...);
                mProgressDialog.setIndeterminate(假);
                //显示progressdialog
                mProgressDialog.show();
            }            @覆盖
            保护无效doInBackground(虚空...... PARAMS){
                //创建一个数组
                ArrayList的=新的ArrayList<&HashMap的LT;字符串,字符串>>();                字符串NEWURL =? +键=+ TYPE_FILTER;
                //从给定的URL地址JSON对象
                的JSONObject = JSONfunctions.getJSONfromURL(http://54.218.73.244:7005/RestaurantAtomicListItemType/+ NEWURL);                尝试{
                    //找到在JSON数组名
                    jsonarray = jsonobject.getJSONArray(餐馆);                    的for(int i = 0; I< jsonarray.length();我++){
                        HashMap的<字符串,字符串>地图=新的HashMap<字符串,字符串>();
                        的JSONObject = jsonarray.getJSONObject(ⅰ);
                        // Retrive JSON对象
                        map.put(BLD_IndividualListOfItems_Starters.NAME,jsonobject.getString(MasterListMenuName));                        //设置JSON对象到数组
                        arraylist.add(地图);
                    }
                }赶上(JSONException E){
                    Log.e(错误,e.getMessage());
                    e.printStackTrace();
                }
                返回null;
            }            @覆盖
            保护无效onPostExecute(无效参数){
                //将结果传递到ListViewAdapter.java
                适配器=新ListViewAdapterForAtomicListItemtype(BLD_IndividualListOfItems_Starters.this,ArrayList的);
                //适配器设置到ListView                mApplication.setArrayListMapData(数组列表);                listview.setAdapter(适配器);
                //关闭progressdialog
                mProgressDialog.dismiss();
            }
        }
    }

MyApplication.java

 包com.example.multitabcheckboxselection;进口的java.util.ArrayList;
进口的java.util.HashMap;进口android.app.Application;公共类MyApplication的扩展应用{    ArrayList的<&HashMap的LT;字符串,字符串>> ArrayList的;    @覆盖
    公共无效的onCreate(){        super.onCreate();
    }    公共无效setArrayListMapData(ArrayList的<&HashMap的LT;字符串,字符串>>使用setData)
    {
        ArrayList的使用setData =;
    }    公众的ArrayList<&HashMap的LT;字符串,字符串>> getArrayListMapData()
    {
        返回数组列表;
    }
}

{编辑-3}

清单

 <?XML版本=1.0编码=UTF-8&GT?;
<清单的xmlns:机器人=htt​​p://schemas.android.com/apk/res/android
    包=com.example.multitabcheckboxselection
    安卓版code =1
    机器人:=的versionName1.0>    <用途-SDK
        安卓的minSdkVersion =8
        机器人:targetSdkVersion =18/>    <使用许可权的android:NAME =android.permission.INTERNET对/>    <应用
        机器人:allowBackup =真
        机器人:图标=@绘制/ ic_launcher
        机器人:标签=@字符串/ APP_NAME
        机器人:主题=@风格/ AppTheme>
        <活动
            机器人:名字=com.example.multitabcheckboxselection.BreakfastLunchDinnerIndividualListOfItems
            机器人:标签=@字符串/ APP_NAME>
            &所述;意图滤光器>
                <作用机器人:名字=android.intent.action.MAIN/>                <类机器人:名字=android.intent.category.LAUNCHER/>
            &所述; /意图滤光器>
        < /活性GT;
        <活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters/>
        <活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_MainCourse/>
        <活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_SideCourse/>
        <活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Others/>
        <活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Desert/>
        <活动机器人:名字=com.example.multitabcheckboxselection.ResultActivity/>
    < /用途>
    <应用
        机器人:allowBackup =真
        机器人:名字=com.example.multitabcheckboxselection.MyApplication
        机器人:图标=@绘制/ ic_launcher
        机器人:标签=@字符串/ APP_NAME>
    < /用途>< /清单>

MyApplication.java

 包com.example.multitabcheckboxselection;进口的java.util.ArrayList;
进口的java.util.HashMap;进口android.app.Application;公共类MyApplication的扩展应用{    ArrayList的<&HashMap的LT;字符串,字符串>> ArrayList的;    @覆盖
    公共无效的onCreate(){        super.onCreate();
    }    公共无效setArrayListMapData(ArrayList的<&HashMap的LT;字符串,字符串>>使用setData)
    {
        ArrayList的使用setData =;
    }    公众的ArrayList<&HashMap的LT;字符串,字符串>> getArrayListMapData()
    {
        返回数组列表;
    }
}

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  01-03 14:13:14.509:E / AndroidRuntime(681):致命异常:主要
01-03 14:13:14.509:E / AndroidRuntime(681):了java.lang.RuntimeException:无法启动活动ComponentInfo{com.example.multitabcheckboxselection/com.example.multitabcheckboxselection.BreakfastLunchDinnerIndividualListOfItems}:了java.lang.RuntimeException:无法启动活动ComponentInfo{com.example.multitabcheckboxselection/com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters}: java.lang.ClassCastException:android.app.Application
01-03 14:13:14.509:E / AndroidRuntime(681):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.app.ActivityThread.access $ 2300(ActivityThread.java:125)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:2033)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.os.Handler.dispatchMessage(Handler.java:99)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.os.Looper.loop(Looper.java:123)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.app.ActivityThread.main(ActivityThread.java:4627)
01-03 14:13:14.509:E / AndroidRuntime(681):在java.lang.reflect.Method.invokeNative(本机方法)
01-03 14:13:14.509:E / AndroidRuntime(681):在java.lang.reflect.Method.invoke(Method.java:521)
01-03 14:13:14.509:E / AndroidRuntime(681):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:868)
01-03 14:13:14.509:E / AndroidRuntime(681):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-03 14:13:14.509:E / AndroidRuntime(681):在dalvik.system.NativeStart.main(本机方法)
01-03 14:13:14.509:E / AndroidRuntime(681):了java.lang.RuntimeException:产生的原因无法启动活动ComponentInfo{com.example.multitabcheckboxselection/com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters}: java.lang.ClassCastException:android.app.Application
01-03 14:13:14.509:E / AndroidRuntime(681):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.app.ActivityThread.startActivityNow(ActivityThread.java:2503)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.widget.TabHost $ IntentContentStrategy.getContentView(TabHost.java:651)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.widget.TabHost.setCurrentTab(TabHost.java:323)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.widget.TabHost.addTab(TabHost.java:213)
01-03 14:13:14.509:E / AndroidRuntime(681):在com.example.multitabcheckboxselection.BreakfastLunchDinnerIndividualListOfItems.onCreate(BreakfastLunchDinnerIndividualListOfItems.java:36)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
01-03 14:13:14.509:E / AndroidRuntime(681):11 ...更多
01-03 14:13:14.509:E / AndroidRuntime(681):java.lang.ClassCastException:产生的原因android.app.Application
01-03 14:13:14.509:E / AndroidRuntime(681):在com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters.onCreate(BLD_IndividualListOfItems_Starters.java:47)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-03 14:13:14.509:E / AndroidRuntime(681):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
01-03 14:13:14.509:E / AndroidRuntime(681):20 ...更多


解决方案

移动属性

 的android:NAME =com.android.app.MyApplication

到第一个应用在清单元素并删除第二个应用元素。

顺便说一句。是你的所有MyApplication 类确实在包 com.android.app <​​/ code>?

编辑:你用不同的包,所以该行应

 的android:NAME =com.example.multitabcheckboxselection.MyApplication

EDIT2 + 3:你已经把它作为一项活动了。除去活动,该属性必须进入应用标记。

 &LT;?XML版本=1.0编码=UTF-8&GT?;
&LT;清单的xmlns:机器人=htt​​p://schemas.android.com/apk/res/android
    包=com.example.multitabcheckboxselection
    安卓版code =1
    机器人:=的versionName1.0&GT;&LT;用途-SDK
    安卓的minSdkVersion =8
    机器人:targetSdkVersion =18/&GT;&LT;使用许可权的android:NAME =android.permission.INTERNET对/&GT;&lt;应用
    机器人:名字=com.example.multitabcheckboxselection.MyApplication
    机器人:allowBackup =真
    机器人:图标=@绘制/ ic_launcher
    机器人:标签=@字符串/ APP_NAME
    机器人:主题=@风格/ AppTheme&GT;
    &LT;活动
        机器人:名字=com.example.multitabcheckboxselection.BreakfastLunchDinnerIndividualListOfItems
        机器人:标签=@字符串/ APP_NAME&GT;
        &所述;意图滤光器&gt;
            &lt;作用机器人:名字=android.intent.action.MAIN/&GT;            &LT;类机器人:名字=android.intent.category.LAUNCHER/&GT;
        &所述; /意图滤光器&gt;
    &LT; /活性GT;
    &LT;活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters/&GT;
    &LT;活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_MainCourse/&GT;
    &LT;活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_SideCourse/&GT;
    &LT;活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Others/&GT;
    &LT;活动机器人:名字=com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Desert/&GT;
    &LT;活动机器人:名字=com.example.multitabcheckboxselection.ResultActivity/&GT;
&LT; /用途&gt;&LT; /清单&GT;

What i am doing:: I am trying to use Myapplication class to send the data to next activity

Problem i am facing:: Having class cast exception

BLD_IndividualListOfItems_Starters.java

public class BLD_IndividualListOfItems_Starters extends Activity{
    // Declare Variables
        JSONObject jsonobject;
        JSONArray jsonarray;
        ListView listview;
        ListViewAdapterForAtomicListItemtype adapter;
        ProgressDialog mProgressDialog;
        ArrayList<HashMap<String, String>> arraylist;
        static String NAME = "rank";
        Button btn;

        String TYPE_FILTER;

        StringBuilder result;


        MyApplication mApplication;

        @Override
        public void onCreate(Bundle savedInstanceState) {



            super.onCreate(savedInstanceState);

            mApplication = (MyApplication)getApplication();
            // Get the view from listview_main.xml
            setContentView(R.layout.listview_main);

            TYPE_FILTER = getIntent().getExtras().getString("key_title");
            Log.v("---- Value-Start---", TYPE_FILTER);
            // Locate the listview in listview_main.xml
            listview = (ListView) findViewById(R.id.listview);

            btn = (Button) findViewById(R.id.button1);
            btn.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub

                    result = new StringBuilder();
                    for (int i = 0; i < arraylist.size(); i++) {
                        if (adapter.mysparse.get(i) == true) {

                            result.append(arraylist.get(i).get(BLD_IndividualListOfItems_Starters.NAME));
                            result.append("\n");
                        }

                    }
                    Intent n = new Intent(BLD_IndividualListOfItems_Starters.this, ResultActivity.class);
                    n.putExtra("buffer", result.toString());
                    startActivity(n);
                }
            });

            // Execute DownloadJSON AsyncTask
            new DownloadJSON().execute();
        }

        // DownloadJSON AsyncTask
        private class DownloadJSON extends AsyncTask<Void, Void, Void> {

            @Override
            protected void onPreExecute() {
                super.onPreExecute();
                // Create a progressdialog
                mProgressDialog = new ProgressDialog(BLD_IndividualListOfItems_Starters.this);
                // Set progressdialog title
                //mProgressDialog.setTitle("Fetching the information");
                // Set progressdialog message
                mProgressDialog.setMessage("Loading...");
                mProgressDialog.setIndeterminate(false);
                // Show progressdialog
                mProgressDialog.show();
            }

            @Override
            protected Void doInBackground(Void... params) {
                // Create an array
                arraylist = new ArrayList<HashMap<String, String>>();

                String newurl = "?" + "Key=" + TYPE_FILTER;


                // Retrieve JSON Objects from the given URL address
                jsonobject = JSONfunctions.getJSONfromURL("http://54.218.73.244:7005/RestaurantAtomicListItemType/"+newurl);

                try {
                    // Locate the array name in JSON
                    jsonarray = jsonobject.getJSONArray("restaurants");

                    for (int i = 0; i < jsonarray.length(); i++) {
                        HashMap<String, String> map = new HashMap<String, String>();
                        jsonobject = jsonarray.getJSONObject(i);
                        // Retrive JSON Objects
                        map.put(BLD_IndividualListOfItems_Starters.NAME, jsonobject.getString("MasterListMenuName"));

                        // Set the JSON Objects into the array
                        arraylist.add(map);
                    }
                } catch (JSONException e) {
                    Log.e("Error", e.getMessage());
                    e.printStackTrace();
                }
                return null;
            }

            @Override
            protected void onPostExecute(Void args) {
                // Pass the results into ListViewAdapter.java
                adapter = new ListViewAdapterForAtomicListItemtype(BLD_IndividualListOfItems_Starters.this, arraylist);
                // Set the adapter to the ListView

                mApplication.setArrayListMapData(arraylist);

                listview.setAdapter(adapter);
                // Close the progressdialog
                mProgressDialog.dismiss();
            }
        }
    }

ResultActivity.java

public class ResultActivity extends ListActivity {

    ListView lstView; 
    ArrayList<HashMap<String,String>> arraylist = new ArrayList<HashMap<String,String>>(); 
    String myName;
    MyApplication mApplication;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        for(int i=0;i<10;i++)
        {
            HashMap<String,String> map = new HashMap<String,String>();
            map.put("key", "value"+i);
            arraylist.add(map);

        }

        String[] from = { "key" };
        int[] to = { R.id.textView1 };
        SimpleAdapter adapter= new SimpleAdapter(this, arraylist,R.layout.custom_single_list, from, to);
        setListAdapter(adapter);

    }

}

Manifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.multitabcheckboxselection"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.multitabcheckboxselection.BreakfastLunchDinnerIndividualListOfItems"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters" />
        <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_MainCourse" />
        <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_SideCourse" />
        <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Others" />
        <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Desert" />
        <activity android:name="com.example.multitabcheckboxselection.ResultActivity" />
    </application>
    <application
        android:name="com.android.app.MyApplication"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
    </application>

</manifest>

ListViewAdapterForAtomicListItemtype.java

public class ListViewAdapterForAtomicListItemtype extends BaseAdapter implements OnCheckedChangeListener {

    // Declare Variables
    Context context;
    LayoutInflater inflater;
    ArrayList<HashMap<String, String>> data;
    HashMap<String, String> resultp = new HashMap<String, String>();
    SparseBooleanArray mysparse;

    public ListViewAdapterForAtomicListItemtype(Context context,
            ArrayList<HashMap<String, String>> arraylist) {
        this.context = context;
        data = arraylist;
        mysparse = new SparseBooleanArray(data.size());
    }

    @Override
    public int getCount() {
        return data.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    public View getView(final int position, View convertView, ViewGroup parent) {
        // Declare Variables
        TextView name;
        CheckBox chk;

        inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View itemView = inflater.inflate(R.layout.listview_item_for_atomic_list_item_type, parent, false);
        // Get the position
        resultp = data.get(position);

        // Locate the TextViews in listview_item.xml
        name = (TextView) itemView.findViewById(R.id.textView_id_atomic_list_item_type);
        chk = (CheckBox) itemView.findViewById(R.id.checkBox_atomic_list_item_type_id);


        // Capture position and set results to the TextViews
        name.setText(resultp.get(BLD_IndividualListOfItems_Starters.NAME));

        chk.setTag(position);
        chk.setChecked(mysparse.get(position, false));
        chk.setOnCheckedChangeListener(this);

        return itemView;
    }

    public boolean isChecked(int position) {
        return mysparse.get(position, false);
    }

    public void setChecked(int position, boolean isChecked) {
        mysparse.put(position, isChecked);

    }

    public void toggle(int position) {
        setChecked(position, !isChecked(position));

    }

    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        // TODO Auto-generated method stub
        mysparse.put((Integer) buttonView.getTag(), isChecked);
    }
}

Log::

01-03 13:30:12.828: D/AndroidRuntime(461): Shutting down VM
01-03 13:30:12.828: W/dalvikvm(461): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
01-03 13:30:12.868: E/AndroidRuntime(461): FATAL EXCEPTION: main
01-03 13:30:12.868: E/AndroidRuntime(461): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.multitabcheckboxselection/com.example.multitabcheckboxselection.BreakfastLunchDinnerIndividualListOfItems}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.multitabcheckboxselection/com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters}: java.lang.ClassCastException: android.app.Application
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.os.Handler.dispatchMessage(Handler.java:99)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.os.Looper.loop(Looper.java:123)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.app.ActivityThread.main(ActivityThread.java:4627)
01-03 13:30:12.868: E/AndroidRuntime(461):  at java.lang.reflect.Method.invokeNative(Native Method)
01-03 13:30:12.868: E/AndroidRuntime(461):  at java.lang.reflect.Method.invoke(Method.java:521)
01-03 13:30:12.868: E/AndroidRuntime(461):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
01-03 13:30:12.868: E/AndroidRuntime(461):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-03 13:30:12.868: E/AndroidRuntime(461):  at dalvik.system.NativeStart.main(Native Method)
01-03 13:30:12.868: E/AndroidRuntime(461): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.multitabcheckboxselection/com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters}: java.lang.ClassCastException: android.app.Application
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.app.ActivityThread.startActivityNow(ActivityThread.java:2503)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:651)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.widget.TabHost.setCurrentTab(TabHost.java:323)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.widget.TabHost.addTab(TabHost.java:213)
01-03 13:30:12.868: E/AndroidRuntime(461):  at com.example.multitabcheckboxselection.BreakfastLunchDinnerIndividualListOfItems.onCreate(BreakfastLunchDinnerIndividualListOfItems.java:36)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
01-03 13:30:12.868: E/AndroidRuntime(461):  ... 11 more
01-03 13:30:12.868: E/AndroidRuntime(461): Caused by: java.lang.ClassCastException: android.app.Application
01-03 13:30:12.868: E/AndroidRuntime(461):  at com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters.onCreate(BLD_IndividualListOfItems_Starters.java:47)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-03 13:30:12.868: E/AndroidRuntime(461):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
01-03 13:30:12.868: E/AndroidRuntime(461):  ... 20 more
01-03 13:30:15.563: I/Process(461): Sending signal. PID: 461 SIG: 9


{Edit}

BLD_IndividualListOfItems_Starters.java

public class BLD_IndividualListOfItems_Starters extends Activity{
    // Declare Variables
        JSONObject jsonobject;
        JSONArray jsonarray;
        ListView listview;
        ListViewAdapterForAtomicListItemtype adapter;
        ProgressDialog mProgressDialog;
        ArrayList<HashMap<String, String>> arraylist;
        static String NAME = "rank";
        Button btn;

        String TYPE_FILTER;

        StringBuilder result;


        MyApplication mApplication;

        @Override
        public void onCreate(Bundle savedInstanceState) {



            super.onCreate(savedInstanceState);

            mApplication = (MyApplication)getApplicationContext();
            // Get the view from listview_main.xml
            setContentView(R.layout.listview_main);

            TYPE_FILTER = getIntent().getExtras().getString("key_title");
            Log.v("---- Value-Start---", TYPE_FILTER);
            // Locate the listview in listview_main.xml
            listview = (ListView) findViewById(R.id.listview);

            btn = (Button) findViewById(R.id.button1);
            btn.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub

                    result = new StringBuilder();
                    for (int i = 0; i < arraylist.size(); i++) {
                        if (adapter.mysparse.get(i) == true) {

                            result.append(arraylist.get(i).get(BLD_IndividualListOfItems_Starters.NAME));
                            result.append("\n");
                        }

                    }
                    Intent n = new Intent(BLD_IndividualListOfItems_Starters.this, ResultActivity.class);
                    n.putExtra("buffer", result.toString());
                    startActivity(n);
                }
            });

            // Execute DownloadJSON AsyncTask
            new DownloadJSON().execute();
        }

        // DownloadJSON AsyncTask
        private class DownloadJSON extends AsyncTask<Void, Void, Void> {

            @Override
            protected void onPreExecute() {
                super.onPreExecute();
                // Create a progressdialog
                mProgressDialog = new ProgressDialog(BLD_IndividualListOfItems_Starters.this);
                // Set progressdialog title
                //mProgressDialog.setTitle("Fetching the information");
                // Set progressdialog message
                mProgressDialog.setMessage("Loading...");
                mProgressDialog.setIndeterminate(false);
                // Show progressdialog
                mProgressDialog.show();
            }

            @Override
            protected Void doInBackground(Void... params) {
                // Create an array
                arraylist = new ArrayList<HashMap<String, String>>();

                String newurl = "?" + "Key=" + TYPE_FILTER;


                // Retrieve JSON Objects from the given URL address
                jsonobject = JSONfunctions.getJSONfromURL("http://54.218.73.244:7005/RestaurantAtomicListItemType/"+newurl);

                try {
                    // Locate the array name in JSON
                    jsonarray = jsonobject.getJSONArray("restaurants");

                    for (int i = 0; i < jsonarray.length(); i++) {
                        HashMap<String, String> map = new HashMap<String, String>();
                        jsonobject = jsonarray.getJSONObject(i);
                        // Retrive JSON Objects
                        map.put(BLD_IndividualListOfItems_Starters.NAME, jsonobject.getString("MasterListMenuName"));

                        // Set the JSON Objects into the array
                        arraylist.add(map);
                    }
                } catch (JSONException e) {
                    Log.e("Error", e.getMessage());
                    e.printStackTrace();
                }
                return null;
            }

            @Override
            protected void onPostExecute(Void args) {
                // Pass the results into ListViewAdapter.java
                adapter = new ListViewAdapterForAtomicListItemtype(BLD_IndividualListOfItems_Starters.this, arraylist);
                // Set the adapter to the ListView

                mApplication.setArrayListMapData(arraylist);

                listview.setAdapter(adapter);
                // Close the progressdialog
                mProgressDialog.dismiss();
            }
        }
    }

MyApplication.java

package com.example.multitabcheckboxselection;

import java.util.ArrayList;
import java.util.HashMap;

import android.app.Application;

public class MyApplication extends Application {

    ArrayList<HashMap<String, String>> arraylist;

    @Override
    public void onCreate() {

        super.onCreate();
    }

    public void setArrayListMapData(ArrayList<HashMap<String, String>> setData)
    {
        arraylist = setData;
    }

    public ArrayList<HashMap<String, String>> getArrayListMapData()
    {
        return arraylist;
    }
}

{Edit-3}

manifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.multitabcheckboxselection"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.multitabcheckboxselection.BreakfastLunchDinnerIndividualListOfItems"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters" />
        <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_MainCourse" />
        <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_SideCourse" />
        <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Others" />
        <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Desert" />
        <activity android:name="com.example.multitabcheckboxselection.ResultActivity" />
    </application>
    <application
        android:allowBackup="true"
        android:name="com.example.multitabcheckboxselection.MyApplication"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
    </application>

</manifest>

MyApplication.java

package com.example.multitabcheckboxselection;

import java.util.ArrayList;
import java.util.HashMap;

import android.app.Application;

public class MyApplication extends Application {

    ArrayList<HashMap<String, String>> arraylist;

    @Override
    public void onCreate() {

        super.onCreate();
    }

    public void setArrayListMapData(ArrayList<HashMap<String, String>> setData)
    {
        arraylist = setData;
    }

    public ArrayList<HashMap<String, String>> getArrayListMapData()
    {
        return arraylist;
    }
}

Log::

01-03 14:13:14.509: E/AndroidRuntime(681): FATAL EXCEPTION: main
01-03 14:13:14.509: E/AndroidRuntime(681): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.multitabcheckboxselection/com.example.multitabcheckboxselection.BreakfastLunchDinnerIndividualListOfItems}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.multitabcheckboxselection/com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters}: java.lang.ClassCastException: android.app.Application
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.os.Handler.dispatchMessage(Handler.java:99)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.os.Looper.loop(Looper.java:123)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.app.ActivityThread.main(ActivityThread.java:4627)
01-03 14:13:14.509: E/AndroidRuntime(681):  at java.lang.reflect.Method.invokeNative(Native Method)
01-03 14:13:14.509: E/AndroidRuntime(681):  at java.lang.reflect.Method.invoke(Method.java:521)
01-03 14:13:14.509: E/AndroidRuntime(681):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
01-03 14:13:14.509: E/AndroidRuntime(681):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-03 14:13:14.509: E/AndroidRuntime(681):  at dalvik.system.NativeStart.main(Native Method)
01-03 14:13:14.509: E/AndroidRuntime(681): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.multitabcheckboxselection/com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters}: java.lang.ClassCastException: android.app.Application
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.app.ActivityThread.startActivityNow(ActivityThread.java:2503)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:651)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.widget.TabHost.setCurrentTab(TabHost.java:323)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.widget.TabHost.addTab(TabHost.java:213)
01-03 14:13:14.509: E/AndroidRuntime(681):  at com.example.multitabcheckboxselection.BreakfastLunchDinnerIndividualListOfItems.onCreate(BreakfastLunchDinnerIndividualListOfItems.java:36)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
01-03 14:13:14.509: E/AndroidRuntime(681):  ... 11 more
01-03 14:13:14.509: E/AndroidRuntime(681): Caused by: java.lang.ClassCastException: android.app.Application
01-03 14:13:14.509: E/AndroidRuntime(681):  at com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters.onCreate(BLD_IndividualListOfItems_Starters.java:47)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-03 14:13:14.509: E/AndroidRuntime(681):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
01-03 14:13:14.509: E/AndroidRuntime(681):  ... 20 more

解决方案

Move the attribute

android:name="com.android.app.MyApplication"

to the first application element in the manifest and delete the second application element.

Btw. is your MyApplication class really in the package com.android.app?

EDIT: you use a different package, so the line should be

android:name="com.example.multitabcheckboxselection.MyApplication"

EDIT2+3: you have put it as an activity now. remove the activity, the attribute must go into the application tag.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.multitabcheckboxselection"
    android:versionCode="1"
    android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="18" />

<uses-permission android:name="android.permission.INTERNET" />

<application
    android:name="com.example.multitabcheckboxselection.MyApplication"
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.multitabcheckboxselection.BreakfastLunchDinnerIndividualListOfItems"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Starters" />
    <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_MainCourse" />
    <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_SideCourse" />
    <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Others" />
    <activity android:name="com.example.multitabcheckboxselection.BLD_IndividualListOfItems_Desert" />
    <activity android:name="com.example.multitabcheckboxselection.ResultActivity" />
</application>

</manifest>

这篇关于android系统中有一个例外classcast同时使用所有MyApplication类的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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