java.lang.RuntimeException:无法实例化活动ComponentInfo {com.example.projectmobilecloud/com.example.projectmobilecloud.MainActivity}: [英] java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.projectmobilecloud/com.example.projectmobilecloud.MainActivity}:
问题描述
lang.RuntimeException:无法实例化活动ComponentInfo"
lang.RuntimeException: Unable to instantiate activity ComponentInfo"
我正在搜索很多相同的案例并试图修复它,但是对于android的初学者来说确实很难解决此问题.
I was searching a lot of same case and tried to fix it, but it is really hard to fix this problem for beginner of android.
我遇到类似的错误
11-14 23:42:20.624:E/AndroidRuntime(1069):致命异常:主 11-14 23:42:20.624:E/AndroidRuntime(1069):java.lang.RuntimeException:无法实例化活动ComponentInfo {com.example.projectmobilecloud/com.example.projectmobilecloud.MainActivity}:java.lang.ClassNotFoundException:com .example.projectmobilecloud.MainActivity 11-14 23:42:20.624:E/AndroidRuntime(1069):位于android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1983) 11-14 23:42:20.624:E/AndroidRuntime(1069):位于android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 11-14 23:42:20.624:E/AndroidRuntime(1069):at android.app.ActivityThread.access $ 600(ActivityThread.java:130) 11-14 23:42:20.624:E/AndroidRuntime(1069):位于android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1195) 11-14 23:42:20.624:E/AndroidRuntime(1069):位于android.os.Handler.dispatchMessage(Handler.java:99) 11-14 23:42:20.624:E/AndroidRuntime(1069):位于android.os.Looper.loop(Looper.java:137) 11-14 23:42:20.624:E/AndroidRuntime(1069):位于android.app.ActivityThread.main(ActivityThread.java:4745) 11-14 23:42:20.624:E/AndroidRuntime(1069):at java.lang.reflect.Method.invokeNative(本机方法) 11-14 23:42:20.624:E/AndroidRuntime(1069):at java.lang.reflect.Method.invoke(Method.java:511) 11-14 23:42:20.624:E/AndroidRuntime(1069):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:786) 11-14 23:42:20.624:E/AndroidRuntime(1069):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 11-14 23:42:20.624:E/AndroidRuntime(1069):在dalvik.system.NativeStart.main(本机方法) 11-14 23:42:20.624:E/AndroidRuntime(1069):原因:java.lang.ClassNotFoundException:com.example.projectmobilecloud.MainActivity 11-14 23:42:20.624:E/AndroidRuntime(1069):在dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61) 11-14 23:42:20.624:E/AndroidRuntime(1069):at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 11-14 23:42:20.624:E/AndroidRuntime(1069):at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 11-14 23:42:20.624:E/AndroidRuntime(1069):位于android.app.Instrumentation.newActivity(Instrumentation.java:1053) 11-14 23:42:20.624:E/AndroidRuntime(1069):位于android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1974) 11-14 23:42:20.624:E/AndroidRuntime(1069):...还有11个
11-14 23:42:20.624: E/AndroidRuntime(1069): FATAL EXCEPTION: main 11-14 23:42:20.624: E/AndroidRuntime(1069): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.projectmobilecloud/com.example.projectmobilecloud.MainActivity}: java.lang.ClassNotFoundException: com.example.projectmobilecloud.MainActivity 11-14 23:42:20.624: E/AndroidRuntime(1069): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1983) 11-14 23:42:20.624: E/AndroidRuntime(1069): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 11-14 23:42:20.624: E/AndroidRuntime(1069): at android.app.ActivityThread.access$600(ActivityThread.java:130) 11-14 23:42:20.624: E/AndroidRuntime(1069): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 11-14 23:42:20.624: E/AndroidRuntime(1069): at android.os.Handler.dispatchMessage(Handler.java:99) 11-14 23:42:20.624: E/AndroidRuntime(1069): at android.os.Looper.loop(Looper.java:137) 11-14 23:42:20.624: E/AndroidRuntime(1069): at android.app.ActivityThread.main(ActivityThread.java:4745) 11-14 23:42:20.624: E/AndroidRuntime(1069): at java.lang.reflect.Method.invokeNative(Native Method) 11-14 23:42:20.624: E/AndroidRuntime(1069): at java.lang.reflect.Method.invoke(Method.java:511) 11-14 23:42:20.624: E/AndroidRuntime(1069): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 11-14 23:42:20.624: E/AndroidRuntime(1069): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 11-14 23:42:20.624: E/AndroidRuntime(1069): at dalvik.system.NativeStart.main(Native Method) 11-14 23:42:20.624: E/AndroidRuntime(1069): Caused by: java.lang.ClassNotFoundException: com.example.projectmobilecloud.MainActivity 11-14 23:42:20.624: E/AndroidRuntime(1069): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61) 11-14 23:42:20.624: E/AndroidRuntime(1069): at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 11-14 23:42:20.624: E/AndroidRuntime(1069): at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 11-14 23:42:20.624: E/AndroidRuntime(1069): at android.app.Instrumentation.newActivity(Instrumentation.java:1053) 11-14 23:42:20.624: E/AndroidRuntime(1069): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1974) 11-14 23:42:20.624: E/AndroidRuntime(1069): ... 11 more
并在MainActivity.java上
and On the MainActivity.java
public class MainActivity extends Activity {
public MainSelection_Tool mt = new MainSelection_Tool();
private RadioGroup radioSexGroup;
private RadioGroup radioWorkGroup;
private RadioButton radioSexButton;
private Button btnDisplay;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addListenerOnButton();
}
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public void addListenerOnButton() {
radioSexGroup = (RadioGroup) findViewById(R.id.radioSex);
radioWorkGroup = (RadioGroup) findViewById(R.id.radioWorkFlow);
btnDisplay = (Button) findViewById(R.id.btnDisplay);
btnDisplay.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// get selected radio button from radioGroup
int selectedId = radioSexGroup.getCheckedRadioButtonId();
int workflow_id = radioWorkGroup.getCheckedRadioButtonId();
Intent GO_Control = new Intent(MainActivity.this,ControlActivity.class);
int wf = mt.Get_Option(workflow_id, 0);
int si = mt.Get_Option(selectedId, 1);
System.out.println("Sel " + si + " wf " + wf);
Log.d("WORK", String.valueOf(wf));
Log.d("Select", String.valueOf(si));
startActivity(GO_Control);
}
});
}
然后 我有AndroidManifest.xml文件...
And AndroidManifest.xml file I have...
<?xml version="1.0" encoding="utf-8"?>
<manifest package="com.example.projectmobilecloud"
android:versionCode="1"
android:versionName="1.0" xmlns:android="http://schemas.android.com/apk/res/android">
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.projectmobilecloud.MainActivity"
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="ControlActivity" android:label="@string/app_name"></activity>
</application>
</manifest>
说实话,我不确定如何解决它.
To be honest , I am not really sure how to fix it.
我只是从Google代码导入项目,然后尝试运行它.
I just import project from the google code and I tried to run it.
在我队友的笔记本电脑上,它工作正常.
From my teammate's laptop , it was working fine.
但是,当我签出并尝试运行它时.我没工作..
However, When I checked out and tried to run it. I didn't work..
推荐答案
如果您已更新到 ADTv17 或更高版本,则旧的 ProGuard 文件将为您完成此操作.创建一个新的空项目,然后查看project.properties和proguard-properties并相应地修改您的当前项目.
If you have updated to ADTv17 or above, the old ProGuard files will do this to you. Create a new empty project, and see project.properties and proguard-properties and modify your current project accordingly.
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