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的Android未捕獲的異常

2012-09-29 39 views
1 
09-30 02:32:31.474: D/ddm-heap(214): Got feature list request 
09-30 02:32:31.634: D/AndroidRuntime(214): Shutting down VM 
09-30 02:32:31.634: W/dalvikvm(214): threadid=3: thread exiting with uncaught exception (group=0x4001b188) 
09-30 02:32:31.634: E/AndroidRuntime(214): Uncaught handler: thread main exiting due to uncaught exception 
09-30 02:32:31.654: E/AndroidRuntime(214): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.mjcet.mjcet/com.mjcet.mjcet.MJCET}: java.lang.ClassNotFoundException: com.mjcet.mjcet.MJCET in loader [email protected] 
09-30 02:32:31.654: E/AndroidRuntime(214): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417) 
09-30 02:32:31.654: E/AndroidRuntime(214): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512) 
09-30 02:32:31.654: E/AndroidRuntime(214): at android.app.ActivityThread.access$2200(ActivityThread.java:119) 
09-30 02:32:31.654: E/AndroidRuntime(214): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863) 
09-30 02:32:31.654: E/AndroidRuntime(214): at android.os.Handler.dispatchMessage(Handler.java:99) 
09-30 02:32:31.654: E/AndroidRuntime(214): at android.os.Looper.loop(Looper.java:123) 
09-30 02:32:31.654: E/AndroidRuntime(214): at android.app.ActivityThread.main(ActivityThread.java:4363) 
09-30 02:32:31.654: E/AndroidRuntime(214): at java.lang.reflect.Method.invokeNative(Native Method) 
09-30 02:32:31.654: E/AndroidRuntime(214): at java.lang.reflect.Method.invoke(Method.java:521) 
09-30 02:32:31.654: E/AndroidRuntime(214): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 
09-30 02:32:31.654: E/AndroidRuntime(214): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
09-30 02:32:31.654: E/AndroidRuntime(214): at dalvik.system.NativeStart.main(Native Method) 
09-30 02:32:31.654: E/AndroidRuntime(214): Caused by: java.lang.ClassNotFoundException: com.mjcet.mjcet.MJCET in loader [email protected] 
09-30 02:32:31.654: E/AndroidRuntime(214): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243) 
09-30 02:32:31.654: E/AndroidRuntime(214): at java.lang.ClassLoader.loadClass(ClassLoader.java:573) 
09-30 02:32:31.654: E/AndroidRuntime(214): at java.lang.ClassLoader.loadClass(ClassLoader.java:532) 
09-30 02:32:31.654: E/AndroidRuntime(214): at android.app.Instrumentation.newActivity(Instrumentation.java:1021) 
09-30 02:32:31.654: E/AndroidRuntime(214): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2409) 
09-30 02:32:31.654: E/AndroidRuntime(214): ... 11 more 
09-30 02:32:31.684: I/dalvikvm(214): threadid=7: reacting to signal 3 
09-30 02:32:31.684: E/dalvikvm(214): Unable to open stack trace file '/data/anr/traces.txt': Permission denied

上面是我的調試輸出以下活動 LOGINACTIVITY.java的Android未捕獲的異常

package com.agrim.mjcet; 
import com.agrim.mjcet.R; 

import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
//import android.widget.TextView; 
import android.widget.Button; 
import android.widget.EditText; 
import android.view.View.OnClickListener; 

public class LoginActivity extends Activity { 
EditText txtUserName; 
EditText txtPassword; 
Button btnLogin; 
    Button btnCancel; 
    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    // setting default screen to login.xml 

    setContentView(R.layout.main); 
    txtUserName=(EditText)this.findViewById(R.id.txtUname); 
    txtPassword=(EditText)this.findViewById(R.id.txtPwd); 
    btnLogin=(Button)this.findViewById(R.id.btnLogin); 
    btnLogin=(Button)this.findViewById(R.id.btnLogin); 
    btnLogin.setOnClickListener(new OnClickListener() 
    { 

     public void onClick(View v) { 
      // Switching to Register screen 
      if((txtUserName.getText().toString()).equals(txtPassword.getText().toString())) 
      { 
       Intent myIntent = new Intent(getApplicationContext(),SampleActivity.class); 
       startActivityForResult(myIntent, 0); 
      } 
            } 
    } 
    ); 
} 
    }

樣品ACTIVITY.java

package com.agrim.mjcet; 
import com.agrim.mjcet.R; 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.TextView; 

public class SampleActivity extends Activity { 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    // Set View to register.xml 
    setContentView(R.layout.lol); 

    TextView HomeScreen = (TextView) findViewById(R.id.back); 


    HomeScreen.setOnClickListener(new View.OnClickListener() { 

     public void onClick(View arg0) { 
          // Closing registration screen 
      // Switching to Login Screen/closing register screen 
      finish(); 

     } 
    }); 
}

}

，這裏是我的2佈局

main.xml中

<TableLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
android:background="#000000" 
android:stretchColumns="1"> 
<TableRow> 
<TextView 
android:text="@string/user_name" 
android:textColor="#347235" 
android:id="@+id/TextView01" 
android:layout_width="wrap_content" 
android:layout_marginLeft="25dip" 
android:layout_height="wrap_content"> 
</TextView> 

<EditText 
android:text="" 
android:inputType="text"  
android:id="@+id/txtUname" 
android:layout_weight="0.75" 
android:layout_width="wrap_content" 
android:layout_marginRight="10dip" 
android:layout_marginBottom="5dip" 
android:background="#FFFFFF" 
android:layout_height="wrap_content"> 
</EditText> 
</TableRow> 


<TableRow> 
<TextView 
android:text="@string/password" 
android:textColor="#347235" 
android:id="@+id/TextView02" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_marginLeft="25dip"> 
</TextView> 


<EditText 
android:text="" 
android:inputType="textPassword" 
android:id="@+id/txtPwd" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_marginRight="10dip" 
android:layout_weight="1" 
android:background="#FFFFFF" 
android:gravity="center"> 
</EditText> 
</TableRow> 


<TableRow> 

<Button 
android:id="@+id/btnLogin" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:background="#FFFFFF" 
android:layout_marginTop="25dip" 
android:layout_marginLeft="50dip" 
android:onClick="onClickMyButton" 
android:text="@string/login" /> 

<Button 
android:id="@+id/btnCancel" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:background="#FFFFFF" 
android:layout_marginTop="25dip" 
android:layout_marginLeft="100dip" 
android:layout_marginRight="50dip" 
android:text="@string/cancel" /> 

</TableRow> 

<FrameLayout 
android:layout_width="wrap_content" 
android:layout_height="match_parent" > 

<ImageView 
android:layout_width="fill_parent" 
android:layout_height="match_parent" 
android:scaleType="centerInside" 
android:src="@drawable/logo_invert" 
android:contentDescription="@drawable/logo_invert"/> 

</FrameLayout> 

</TableLayout>

最後LOL.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:background="#000000" 
    android:layout_height="fill_parent" > 
    <ImageView 
     android:layout_width="fill_parent" 
     android:id="@+id/back" 
     android:layout_height="match_parent" 
     android:scaleType="centerInside" 
     android:src="@drawable/lol" 
     android:contentDescription="@drawable/lol"> 
    </ImageView> 


    <RelativeLayout 
     android:layout_width="match_parent" 
     android:layout_height="138dp" 
     android:orientation="vertical" 
     android:gravity="bottom" > 

     <TextView 
      android:id="@+id/TextView02" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignParentBottom="true" 
      android:layout_centerHorizontal="true" 
      android:text="@string/coming_soon" 
      android:textColor="#347235" /> 

    </RelativeLayout> 

</FrameLayout>

，這裏是我的Android的Manifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
package="com.mjcet.mjcet" 
android:versionCode="1" 
android:versionName="1.0" > 

<uses-permission 
    android:name="android.permission.INTERNET"></uses-permission> 
<uses-sdk android:minSdkVersion="7" 
     android:targetSdkVersion="15" 
     android:maxSdkVersion="16" /> 
<application 
    android:icon="@drawable/ic_launcher" 
    android:label="@string/app_name" 
    > 

    <activity 
     android:name="MJCET" 
     android:label="welcome to MJCET" > 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 
      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
<activity android:name=".SampleActivity"></activity> 
</application> 

</manifest>

我在初始化時得到一個強制關閉..是的這是我的第一個Android應用程序:)

來源

2012-09-29 Agrim Asthana

回答

1

您需要在AndroidManifest.xml中添加SampleActivity。

來源

2012-09-29 21:40:52 Luis

0

它看起來像你的AndroidManifest.xml聲明一個活動（MJECT）不存在。

來源

2012-09-29 21:40:01 jbowes

+0

添加了androidmanifest.xml –

0

也許還有其他錯誤，但我第一次發現的是，View與編號back是ImageView。您嘗試訪問並將其投射到TextView。這完全導致ClassCastException。

來源

2012-09-29 21:41:40

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