The application has stopped unexpectedly!

I have two class as trial.java and ImageWoLab0.java(Image without lable 0).When I run my application I am getting error as : The application has stopped unexpectedly!!

public void onClick(View v) 
{
    switch (v.getId()) 
    {
    case R.id.btnSequence:
        Intent intent1 = new Intent();
        intent1.setClass(this,ImageWoLab0.class);       /*To open new Screen/Activity */
        //intent1.putExtra("String_key", "value");  /*Passing a key/value(Condition) to Activity2.class*/
        startActivity(intent1);                     /*open the new screen/Activity*/
        break;

    case R.id.btnVideo:
        Intent intent2 = new Intent();
        intent2.setClass(this,Activity2.class);
        intent2.putExtra("String_key", "value1");
        startActivity(intent2);
        break;

    case R.id.btnInfo:
        Intent intent3 = new Intent();
        intent3.setClass(this,Activity2.class);

        intent3.putExtra("String_key", "value2");
        startActivity(intent3);
        break;
    }

othar class as:

public class ImageWoLab0 extends Activity implements OnClickListener

{ private static String TAG = "tag";

@Override
public void onCreate(Bundle savedInstanceState) 
{
    Log.i(TAG, "abc");
    super.onCreate(savedInstanceState);
    setContentView(R.layout.image0);
    ImageButton o1 = (ImageButton) findViewById(R.id.next);
    o1.setOnClickListener(this);

}

@Override
public void onClick(View v) 
{
    switch (v.getId()) 
    {
    case R.id.next:
        Intent intent1 = new Intent();
        intent1.setClass(this,ImageWoLab1.class);
        startActivity(intent1);
        break;


    }

}

}

I have clean again and again even rebuild again still the same messageis displaying. I am getting log as:sorry if I have not send log in right format(first time i am using logcat):

11-08 12:48:55.084: INFO/tag(334): abc
11-08 12:48:55.154: WARN/dalvikvm(334): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
11-08 12:48:55.204: ERROR/AndroidRuntime(334): FATAL EXCEPTION: main
11-08 12:48:55.204: ERROR/AndroidRuntime(334): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.Trial/com.example.Trial.ImageWoLab0}: java.lang.ClassCastException: android.widget.ImageView
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at android.os.Looper.loop(Looper.java:123)
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at android.app.ActivityThread.main(ActivityThread.java:4627)
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at java.lang.reflect.Method.invokeNative(Native Method)
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at java.lang.reflect.Method.invoke(Method.java:521)
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at dalvik.system.NativeStart.main(Native Method)
11-08 12:48:55.204: ERROR/AndroidRuntime(334): Caused by: java.lang.ClassCastException: android.widget.ImageView
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at com.example.Trial.ImageWoLab0.onCreate(ImageWoLab0.java:21)
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
11-08 12:48:55.204: ERROR/AndroidRuntime(334):     ... 11 more
11-08 12:48:55.264: WARN/ActivityManager(61):   Force finishing activity com.example.Trial/.ImageWoLab0
11-08 12:48:55.274: WARN/ActivityManager(61):   Fo开发者_StackOverflowrce finishing activity com.example.Trial/.Trial

Based on that log, you're getting a ClassCastException in onCreate. There's only one line where you do any casting. Are you sure that the thing with ID name is actually an ImageButton and not something else?

thanks Yuliy!!i have resolved the problem, Actually in xml i was taking imageview

<?xml version="1.0" encoding="utf-8"?>

while on .java file i was making object of imagebutton as:

ImageButton o1 = (ImageButton) findViewById(R.id.next);
o1.setOnClickListener(this); now problem solved!!!!