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POnull pointer exception only on tablet
 

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  1. POnull pointer exception only on tablet
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    <p>hi my program works fine on portrait mode and phones but in tablets it wont work and forcecloses the error is this </p> <blockquote> <p></p> </blockquote> <pre><code>05-31 07:07:10.888: E/AndroidRuntime(1012): FATAL EXCEPTION: main 05-31 07:07:10.888: E/AndroidRuntime(1012): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.soheil.prolight/com.soheil.prolight.MainActivity}: java.lang.NullPointerException: println needs a message 05-31 07:07:10.888: E/AndroidRuntime(1012): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956) 05-31 07:07:10.888: E/AndroidRuntime(1012): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 05-31 07:07:10.888: E/AndroidRuntime(1012): at android.app.ActivityThread.access$600(ActivityThread.java:123) 05-31 07:07:10.888: E/AndroidRuntime(1012): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 05-31 07:07:10.888: E/AndroidRuntime(1012): at android.os.Handler.dispatchMessage(Handler.java:99) 05-31 07:07:10.888: E/AndroidRuntime(1012): at android.os.Looper.loop(Looper.java:137) 05-31 07:07:10.888: E/AndroidRuntime(1012): at android.app.ActivityThread.main(ActivityThread.java:4424) 05-31 07:07:10.888: E/AndroidRuntime(1012): at java.lang.reflect.Method.invokeNative(Native Method) 05-31 07:07:10.888: E/AndroidRuntime(1012): at java.lang.reflect.Method.invoke(Method.java:511) 05-31 07:07:10.888: E/AndroidRuntime(1012): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 05-31 07:07:10.888: E/AndroidRuntime(1012): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 05-31 07:07:10.888: E/AndroidRuntime(1012): at dalvik.system.NativeStart.main(Native Method) 05-31 07:07:10.888: E/AndroidRuntime(1012): Caused by: java.lang.NullPointerException: println needs a message 05-31 07:07:10.888: E/AndroidRuntime(1012): at android.util.Log.println_native(Native Method) 05-31 07:07:10.888: E/AndroidRuntime(1012): at android.util.Log.e(Log.java:231) 05-31 07:07:10.888: E/AndroidRuntime(1012): at com.soheil.prolight.MainActivity.getCamera(MainActivity.java:184) 05-31 07:07:10.888: E/AndroidRuntime(1012): at com.soheil.prolight.MainActivity.onCreate(MainActivity.java:146) 05-31 07:07:10.888: E/AndroidRuntime(1012): at android.app.Activity.performCreate(Activity.java:4465) 05-31 07:07:10.888: E/AndroidRuntime(1012): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 05-31 07:07:10.888: E/AndroidRuntime(1012): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) </code></pre> <p>and here is my code consider that im not taking anyyy errors on phones :</p> <pre><code>public class MainActivity extends Activity { ImageButton btnSwitch; ImageButton morebtn; ToggleButton tb_mute; AudioManager mAudioManager; boolean mute; private Camera camera; private boolean isFlashOn; private boolean hasFlash; Parameters params; MediaPlayer mp; float oldBrightNess = 0; float newBrightNess = 1.0f; //add private AdView adView; public ContextWrapper context; public Object paramString; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); this.getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN | WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD | WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON); //ads //papaya AppFlood.initialize(this, "XXXXXXXXX", "xxxxxxxxxxxxxxxx", AppFlood.AD_ALL); // Look up the AdView as a resource and load a request. AdView adView = (AdView)this.findViewById(R.id.adView); AdRequest adRequest = new AdRequest(); LinearLayout layout = (LinearLayout) findViewById(R.id.mainline); // Initiate a generic request to load it with an ad adView.loadAd(adRequest); morebtn = (ImageButton) findViewById(R.id.imageButton1); morebtn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent newActivity = new Intent(MainActivity.this,more.class); startActivity(newActivity); } }); // flash switch button btnSwitch = (ImageButton) findViewById(R.id.btnSwitch); //Mute tb_mute = (ToggleButton) findViewById(R.id.toggleButton1); mAudioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE); if(mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC)==0){ mute = true; tb_mute.setChecked(mute); }else{ mute = false; tb_mute.setChecked(mute); } tb_mute.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if(!mute){ mAudioManager.setStreamMute(AudioManager.STREAM_MUSIC, true); tb_mute.setChecked(true); mute = true; }else{ mAudioManager.setStreamMute(AudioManager.STREAM_MUSIC, false); tb_mute.setChecked(false); mute = false; } } }); // First check if device is supporting flashlight or not hasFlash = getApplicationContext().getPackageManager() .hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH); getCamera(); btnSwitch.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (!hasFlash) { // turn off flash Intent newActivity = new Intent(MainActivity.this,screenlight.class); startActivity(newActivity); turnOffFlash(); } else if (hasFlash &amp;&amp; isFlashOn) { playSound(); toggleButtonImage(); // turn off flash turnOffFlash(); } else { playSound(); toggleButtonImage(); // turn on flash turnOnFlash(); } } }); return; } // Get the camera private void getCamera() { if (camera == null) { try { camera = Camera.open(); params = camera.getParameters(); } catch (RuntimeException e) { Log.e("Camera Error. Failed to Open. Error: ", e.getMessage()); } } } // Turning On flash private void turnOnFlash() { if (!isFlashOn) { if (camera == null || params == null) { return; } // play sound playSound(); params = camera.getParameters(); params.setFlashMode(Parameters.FLASH_MODE_TORCH); camera.setParameters(params); camera.startPreview(); isFlashOn = true; // changing button/switch image toggleButtonImage(); } } // Turning Off flash private void turnOffFlash() { if (isFlashOn) { if (camera == null || params == null) { return; } // play sound playSound(); params = camera.getParameters(); params.setFlashMode(Parameters.FLASH_MODE_OFF); camera.setParameters(params); camera.stopPreview(); isFlashOn = false; // changing button/switch image toggleButtonImage(); } } // Playing sound // will play button toggle sound on flash on / off private void playSound(){ if(isFlashOn){ mp = MediaPlayer.create(MainActivity.this, R.raw.beep); }else{ mp = MediaPlayer.create(MainActivity.this, R.raw.beep); } mp.setOnCompletionListener(new OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { mp.release(); } }); mp.start(); } /* * Toggle switch button images * changing image states to on / off * */ private void toggleButtonImage(){ if(isFlashOn){ btnSwitch.setImageResource(R.drawable.btn_switch_on); }else{ btnSwitch.setImageResource(R.drawable.btn_switch_off); } } @Override protected void onPause() { if (adView != null) { adView.destroy(); } super.onPause(); } @Override protected void onDestroy() { if (adView != null) { adView.destroy(); } AppFlood.destroy(); super.onDestroy(); } @Override protected void onRestart() { super.onRestart(); } @Override protected void onResume() { super.onResume(); } @Override protected void onStart() { super.onStart(); turnOnFlash(); // on starting the app get the camera params getCamera(); } @Override protected void onStop() { super.onStop(); // on stop release the camera if (camera != null) { camera.release(); camera = null; } } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater=getMenuInflater(); inflater.inflate(R.menu.mymenu, menu); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { if(item.getItemId()==R.id.item1){ Dialog d=new Dialog(MainActivity.this); d.setContentView(R.layout.aboutdialog); d.setTitle("About"); d.show(); } return super.onOptionsItemSelected(item); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if ((keyCode == KeyEvent.KEYCODE_BACK)) { finish(); } return super.onKeyDown(keyCode, event); } } </code></pre> <p>and if u want my layout xml code here it is :</p> <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@drawable/background" android:gravity="top" tools:context=".MainActivity" &gt; &lt;ImageButton android:id="@+id/btnSwitch" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:layout_marginTop="25dp" android:background="@null" android:contentDescription="@null" android:src="@drawable/btn_switch_on" /&gt; &lt;TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/textView2" android:layout_centerHorizontal="true" android:text="@string/Develop" android:textColor="#C0C0C0" android:textSize="15sp" /&gt; &lt;TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:padding="5dp" android:text="@string/soheilen" android:textColor="#C0C0C0" android:textSize="18sp" /&gt; &lt;ImageButton android:id="@+id/imageButton1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:background="@null" android:contentDescription="@null" android:minHeight="64dp" android:minWidth="64dp" android:src="@drawable/more" /&gt; &lt;ToggleButton android:id="@+id/toggleButton1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" android:text="@string/mute" android:textOff="@string/mute" android:textOn="@string/mute" /&gt; &lt;LinearLayout android:layout_height="wrap_content" android:orientation="vertical" android:layout_width="fill_parent" android:id="@+id/mainline" android:gravity="top" &gt; &lt;com.google.ads.AdView android:id="@+id/adView" android:layout_width="match_parent" android:layout_height="wrap_content" ads:adSize="BANNER" ads:adUnitId="xxxxxxxx" ads:loadAdOnCreate="true" android:gravity="top" &gt; &lt;/com.google.ads.AdView&gt; &lt;/LinearLayout&gt; </code></pre> <p></p> <p>i wonder where is the error come from ?</p>
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    1. COThis is a nullpointer exception occured by trying to print something which has a null value. Please post your entire error log so that we find at which line the error is occuring. The only logging command in your activity is **Log.e("Camera Error. Failed to Open. Error: ", e.getMessage());** may be this is causing your error
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      1. USMahesh
    2. CO@Mahesh full error aded
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    3. COFunny. Catching a `RuntimeException` (which you shouldn't be doing) you were caught by another `RuntimeException`.
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      1. USMaciejGórski
 

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