如何开辟新的活动点击列表视图中的项目? [英] How open new activity clicking an item in listview?
本文介绍了如何开辟新的活动点击列表视图中的项目?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我无法启动一个新的活动点击在某个项目上我的列表视图。我想这 onItemClick
可以打开 ApkInfoActivity
..其实当我点击没有发生。
保护无效onItemClick(ListView的L,视图V,INT位置,长的ID,适配器视图<>母公司){
super.onListItemClick(L,V,位置ID);
最后ApplicationInfo应用= applist.get(位置);
PackageInfo packageInfo =(PackageInfo)parent.getItemAtPosition(位置);
AppDataActivity APPDATA =(AppDataActivity)getApplicationContext();
appData.setPackageInfo(packageInfo);
意图APPINFO =新的意图(getApplicationContext(),ApkInfoActivity.class);
startActivity(APPINFO);
}
我找不到problem..How我可以解决?
编辑与logcat的:
10-29 17:14:07.710:E / AndroidRuntime(3535):致命异常:主要
10-29 17:14:07.710:E / AndroidRuntime(3535):java.lang.ClassCastException:android.content.pm.ApplicationInfo不能转换为android.content.pm.PackageInfo
10-29 17:14:07.710:E / AndroidRuntime(3535):在com.dd.application.MainActivity.onItemClick(MainActivity.java:369)
10-29 17:14:07.710:E / AndroidRuntime(3535):在android.widget.AdapterView.performItemClick(AdapterView.java:297)
10-29 17:14:07.710:E / AndroidRuntime(3535):在android.widget.AbsListView.performItemClick(AbsListView.java:1149)
10-29 17:14:07.710:E / AndroidRuntime(3535):在android.widget.AbsListView $ PerformClick.run(AbsListView.java:2939)
10-29 17:14:07.710:E / AndroidRuntime(3535):在android.widget.AbsListView $ 2.运行(AbsListView.java:3622)
10-29 17:14:07.710:E / AndroidRuntime(3535):在android.os.Handler.handleCallback(Handler.java:730)
10-29 17:14:07.710:E / AndroidRuntime(3535):在android.os.Handler.dispatchMessage(Handler.java:92)
10-29 17:14:07.710:E / AndroidRuntime(3535):在android.os.Looper.loop(Looper.java:137)
10-29 17:14:07.710:E / AndroidRuntime(3535):在android.app.ActivityThread.main(ActivityThread.java:5323)
10-29 17:14:07.710:E / AndroidRuntime(3535):在java.lang.reflect.Method.invokeNative(本机方法)
10-29 17:14:07.710:E / AndroidRuntime(3535):在java.lang.reflect.Method.invoke(Method.java:525)
10-29 17:14:07.710:E / AndroidRuntime(3535):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:743)
10-29 17:14:07.710:E / AndroidRuntime(3535):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:559)
10-29 17:14:07.710:E / AndroidRuntime(3535):在dalvik.system.NativeStart.main(本机方法)
解决方案
公共类MenuYangu扩展ListActivity {
字符串类[] = {测验小事,注册新用户,好友列表,
下载文件,上传文件,选择PDF文件,记忆游戏,
Dzidza数学,写考试};
@覆盖
保护无效的onCreate(包savedInstanceState)
{
// TODO自动生成方法存根
super.onCreate(savedInstanceState);
setListAdapter(新ArrayAdapter<字符串>(Menuone.this,
android.R.layout.simple_list_item_1,班));
}
@覆盖
保护无效onListItemClick(ListView的L,视图V,INT位置,长ID)
{
// TODO自动生成方法存根
super.onListItemClick(L,V,位置ID);
如果(位置== 0){
意向意图=新的意图(这一点,QuizActivity.class);
startActivity(意向);
}
否则,如果(位置== 1){
意向意图=新的意图(这一点,SignUp.class);
startActivity(意向);
}
否则,如果(位置== 2){
意向意图=新的意图(这一点,FriendList.class);
startActivity(意向);
}
}
}
}
I can't start a new activity clicking over an item in my listview. I want that onItemClick
can open the ApkInfoActivity
.. Actually when i click nothing happen.
protected void onItemClick(ListView l, View v, int position, long id, AdapterView<?> parent) {
super.onListItemClick(l, v, position, id);
final ApplicationInfo app = applist.get(position);
PackageInfo packageInfo = (PackageInfo) parent.getItemAtPosition(position);
AppDataActivity appData = (AppDataActivity) getApplicationContext();
appData.setPackageInfo(packageInfo);
Intent appInfo = new Intent(getApplicationContext(), ApkInfoActivity.class);
startActivity(appInfo);
}
I can't find the problem..How can i solve?
EDIT with logcat:
10-29 17:14:07.710: E/AndroidRuntime(3535): FATAL EXCEPTION: main
10-29 17:14:07.710: E/AndroidRuntime(3535): java.lang.ClassCastException: android.content.pm.ApplicationInfo cannot be cast to android.content.pm.PackageInfo
10-29 17:14:07.710: E/AndroidRuntime(3535): at com.dd.application.MainActivity.onItemClick(MainActivity.java:369)
10-29 17:14:07.710: E/AndroidRuntime(3535): at android.widget.AdapterView.performItemClick(AdapterView.java:297)
10-29 17:14:07.710: E/AndroidRuntime(3535): at android.widget.AbsListView.performItemClick(AbsListView.java:1149)
10-29 17:14:07.710: E/AndroidRuntime(3535): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2939)
10-29 17:14:07.710: E/AndroidRuntime(3535): at android.widget.AbsListView$2.run(AbsListView.java:3622)
10-29 17:14:07.710: E/AndroidRuntime(3535): at android.os.Handler.handleCallback(Handler.java:730)
10-29 17:14:07.710: E/AndroidRuntime(3535): at android.os.Handler.dispatchMessage(Handler.java:92)
10-29 17:14:07.710: E/AndroidRuntime(3535): at android.os.Looper.loop(Looper.java:137)
10-29 17:14:07.710: E/AndroidRuntime(3535): at android.app.ActivityThread.main(ActivityThread.java:5323)
10-29 17:14:07.710: E/AndroidRuntime(3535): at java.lang.reflect.Method.invokeNative(Native Method)
10-29 17:14:07.710: E/AndroidRuntime(3535): at java.lang.reflect.Method.invoke(Method.java:525)
10-29 17:14:07.710: E/AndroidRuntime(3535): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:743)
10-29 17:14:07.710: E/AndroidRuntime(3535): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:559)
10-29 17:14:07.710: E/AndroidRuntime(3535): at dalvik.system.NativeStart.main(Native Method)
解决方案
public class MenuYangu extends ListActivity {
String classes[] = { "Quiz Trivia", "Sign A New User", "Friend List",
"Download A File", "Upload A File", "Select Pdf files", "Memory Game",
"Dzidza Maths", "Write Exam" };
@Override
protected void onCreate(Bundle savedInstanceState)
{
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setListAdapter(new ArrayAdapter<String>(Menuone.this,
android.R.layout.simple_list_item_1, classes));
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id)
{
// TODO Auto-generated method stub
super.onListItemClick(l, v, position, id);
if (position == 0) {
Intent intent = new Intent(this, QuizActivity.class);
startActivity(intent);
}
else if (position == 1) {
Intent intent = new Intent(this, SignUp.class);
startActivity(intent);
}
else if (position == 2) {
Intent intent = new Intent(this, FriendList.class);
startActivity(intent);
}
}
}
}
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