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POandroid : camera.getParameters() crashes app
 

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    <p>i'm using this code to use the camera LED as flashlight but it crashes when the service starts. Using Log.w() statements i found it stops at param = camera.getParameters();. i have included the android.permission.CAMERA in my manifest. i don't understand what causes the crash. how can i fix this?</p> <pre><code> public class Flashlight extends Service { private Camera camera; private Parameters param; private final IBinder mBinder = new LocalBinder(); public class LocalBinder extends Binder { Flashlight getService() { return Flashlight.this; } } public int onStartCommand(Intent intent, int flags, int startId) { Log.w("1","camera.open"); Camera.open(); Log.w("1","camera.getParameters"); param = camera.getParameters(); Log.w("1","i got camera parameters"); List&lt;String&gt; pList = camera.getParameters().getSupportedFlashModes(); if(pList.contains(Parameters.FLASH_MODE_TORCH)){ param.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH); } else if(pList.contains(Parameters.FLASH_MODE_ON)){ param.setFlashMode(Camera.Parameters.FLASH_MODE_ON); } param.setFocusMode(Camera.Parameters.FOCUS_MODE_INFINITY); try{ camera.setParameters(param); camera.startPreview(); } catch (Exception e){ Toast.makeText(getApplicationContext(), "Your device does not have flash light support", Toast.LENGTH_SHORT).show(); } return START_STICKY; } @Override public void onDestroy() { // TODO Auto-generated method stub super.onDestroy(); Parameters p=camera.getParameters(); p.setFlashMode(Parameters.FLASH_MODE_OFF); camera.setParameters(p); camera.stopPreview(); camera.release(); } @Override public IBinder onBind(Intent intent) { return mBinder; } } </code></pre> <p>this is the LogCcat</p> <pre><code>12-15 15:44:32.037: W/1(26304): camera.open 12-15 15:44:32.347: W/1(26304): camera.getParameters 12-15 15:44:32.347: D/AndroidRuntime(26304): Shutting down VM 12-15 15:44:32.347: W/dalvikvm(26304): threadid=1: thread exiting with uncaught exception (group=0x40a9e228) 12-15 15:44:32.357: E/AndroidRuntime(26304): FATAL EXCEPTION: main 12-15 15:44:32.357: E/AndroidRuntime(26304): java.lang.RuntimeException: Unable to start service com.bill.deuterh.Flashlight@40dd0978 with Intent { cmp=com.bill.deuterh/.Flashlight }: java.lang.NullPointerException 12-15 15:44:32.357: E/AndroidRuntime(26304): at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2738) 12-15 15:44:32.357: E/AndroidRuntime(26304): at android.app.ActivityThread.access$1900(ActivityThread.java:139) 12-15 15:44:32.357: E/AndroidRuntime(26304): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1334) 12-15 15:44:32.357: E/AndroidRuntime(26304): at android.os.Handler.dispatchMessage(Handler.java:99) 12-15 15:44:32.357: E/AndroidRuntime(26304): at android.os.Looper.loop(Looper.java:154) 12-15 15:44:32.357: E/AndroidRuntime(26304): at android.app.ActivityThread.main(ActivityThread.java:4945) 12-15 15:44:32.357: E/AndroidRuntime(26304): at java.lang.reflect.Method.invokeNative(Native Method) 12-15 15:44:32.357: E/AndroidRuntime(26304): at java.lang.reflect.Method.invoke(Method.java:511) 12-15 15:44:32.357: E/AndroidRuntime(26304): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 12-15 15:44:32.357: E/AndroidRuntime(26304): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 12-15 15:44:32.357: E/AndroidRuntime(26304): at dalvik.system.NativeStart.main(Native Method) 12-15 15:44:32.357: E/AndroidRuntime(26304): Caused by: java.lang.NullPointerException 12-15 15:44:32.357: E/AndroidRuntime(26304): at com.bill.deuterh.Flashlight.onStartCommand(Flashlight.java:32) 12-15 15:44:32.357: E/AndroidRuntime(26304): at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2715) 12-15 15:44:32.357: E/AndroidRuntime(26304): ... 10 more </code></pre> <p>i finally figured it out after a lot of trial end error.i'm posting the correct code for getting the parameteres, for other users with this problem</p> <pre><code> camera = Camera.open(); Camera.Parameters param = camera.getParameters(); </code></pre>
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