應用程序崩潰

-5

當我嘗試運行我的應用程序時，我的應用程序崩潰。它在日誌文件中顯示一些錯誤。以下是日誌文件中顯示的錯誤。應用程序崩潰

請幫忙解決這個錯誤。

LOG文件

08-20 23:04:41.766: E/AndroidRuntime(8695): FATAL EXCEPTION: main 
08-20 23:04:41.766: E/AndroidRuntime(8695): Process: com.example.er.wolfpack, PID: 8695 
08-20 23:04:41.766: E/AndroidRuntime(8695): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.er.wolfpack/com.example.er.wolfpack.MainActivity}: java.lang.NullPointerException 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2318) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2396) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at android.app.ActivityThread.access$800(ActivityThread.java:139) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1293) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at android.os.Handler.dispatchMessage(Handler.java:102) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at android.os.Looper.loop(Looper.java:149) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at android.app.ActivityThread.main(ActivityThread.java:5257) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at java.lang.reflect.Method.invokeNative(Native Method) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at java.lang.reflect.Method.invoke(Method.java:515) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at dalvik.system.NativeStart.main(Native Method) 
08-20 23:04:41.766: E/AndroidRuntime(8695): Caused by: java.lang.NullPointerException 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at com.example.er.wolfpack.MainActivity.onCreate(MainActivity.java:26) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at android.app.Activity.performCreate(Activity.java:5411) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2270) 
08-20 23:04:41.766: E/AndroidRuntime(8695):  ... 11 more

public class MainActivity extends Activity implements View.OnClickListener { 

ImageView im1; 
TextView tv1; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_login); 


    tv1=(TextView)findViewById(R.id.textView1); 
    im1=(ImageView)findViewById(R.id.imageView1); 

    tv1.setOnClickListener(this); 
    im1.setOnClickListener(this); 
} 

@Override 
public void onClick(View v) { 

    startActivity(new Intent(this,Login.class)); 

} 
}

來源

2015-08-20 Swapnil Saraf

MainActivity.java中的第26行是什麼？ – Lal