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PObutton.performclick() is not working
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  1. PObutton.performclick() is not working
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    copied!<p>I have a simple code which records video on clicking a button. Manual click works fine but <code>myButton.performClick()</code> does not work (the app stops). I have tried setPressed() too but the click by it does not cause any effect. If I directly start mediarecorder without any button click, then also the app crashes. I am clueless.</p> <pre><code> public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); recording = false; setContentView(R.layout.main); //Get Camera for preview myCamera = getCameraInstance(); if(myCamera == null){ Toast.makeText(AndroidVideoCapture.this, "Fail to get Camera", Toast.LENGTH_LONG).show(); } myCameraSurfaceView = new MyCameraSurfaceView(this, myCamera); FrameLayout myCameraPreview = (FrameLayout)findViewById(R.id.videoview); myCameraPreview.addView(myCameraSurfaceView); myButton = (Button)findViewById(R.id.mybutton); myButton.setOnClickListener(myButtonOnClickListener); myButton.performClick(); } Button.OnClickListener myButtonOnClickListener = new Button.OnClickListener(){ @Override public void onClick(View v) { // TODO Auto-generated method stub if(recording){ // stop recording and release camera mediaRecorder.stop(); // stop the recording releaseMediaRecorder(); // release the MediaRecorder object //Exit after saved finish(); }else{ //Release Camera before MediaRecorder start releaseCamera(); if(!prepareMediaRecorder()){ Toast.makeText(AndroidVideoCapture.this, "Fail in prepareMediaRecorder()!\n - Ended -", Toast.LENGTH_LONG).show(); finish(); } mediaRecorder.start(); recording = true; myButton.setText("STOP"); } }}; </code></pre> <p>My log file-</p> <pre><code> 05-16 12:40:35.680: E/MediaRecorderJNI(1710): Application lost the surface 05-16 12:40:35.680: E/AndroidRuntime(1710): in writeCrashedAppName, pkgName :com.exercise.AndroidVideoCapture 05-16 12:40:35.680: E/AndroidRuntime(1710): FATAL EXCEPTION: main 05-16 12:40:35.680: E/AndroidRuntime(1710): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.exercise.AndroidVideoCapture/com.exercise.AndroidVideoCapture.AndroidVideoCapture}: java.lang.NullPointerException 05-16 12:40:35.680: E/AndroidRuntime(1710): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 05-16 12:40:35.680: E/AndroidRuntime(1710): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 05-16 12:40:35.680: E/AndroidRuntime(1710): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 05-16 12:40:35.680: E/AndroidRuntime(1710): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 05-16 12:40:35.680: E/AndroidRuntime(1710): at android.os.Handler.dispatchMessage(Handler.java:99) 05-16 12:40:35.680: E/AndroidRuntime(1710): at android.os.Looper.loop(Looper.java:130) 05-16 12:40:35.680: E/AndroidRuntime(1710): at android.app.ActivityThread.main(ActivityThread.java:3683) 05-16 12:40:35.680: E/AndroidRuntime(1710): at java.lang.reflect.Method.invokeNative(Native Method) 05-16 12:40:35.680: E/AndroidRuntime(1710): at java.lang.reflect.Method.invoke(Method.java:507) 05-16 12:40:35.680: E/AndroidRuntime(1710): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:880) 05-16 12:40:35.680: E/AndroidRuntime(1710): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:638) 05-16 12:40:35.680: E/AndroidRuntime(1710): at dalvik.system.NativeStart.main(Native Method) 05-16 12:40:35.680: E/AndroidRuntime(1710): Caused by: java.lang.NullPointerException 05-16 12:40:35.680: E/AndroidRuntime(1710): at com.exercise.AndroidVideoCapture.AndroidVideoCapture$1.onClick(AndroidVideoCapture.java:145) 05-16 12:40:35.680: E/AndroidRuntime(1710): at android.view.View.performClick(View.java:2485) 05-16 12:40:35.680: E/AndroidRuntime(1710): at com.exercise.AndroidVideoCapture.AndroidVideoCapture.onCreate(AndroidVideoCapture.java:74) 05-16 12:40:35.680: E/AndroidRuntime(1710): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 05-16 12:40:35.680: E/AndroidRuntime(1710): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 05-1 </code></pre> <p>6 12:40:35.680: E/AndroidRuntime(1710): ... 11 more</p>
 

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