android - Camera Preview is displaying a black screen -

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protected void onresume() {         super.onresume();         log.d("onresume", "camera has been resumed");          try {                mcamera = camera.open();             log.d("onresume", "camera has been opened");             mcamera.startpreview();             log.d("onresume", "camera has started preview");             preview.setcamera(mcamera);             log.d("onresume", "setcamera");             }   catch (runtimeexception ex) {             log.d("onresume", ex.getmessage());         }     }

getting error while mcamera=camera.open() called.it not able connect camera services. inspit of using permission in manifest file.

 error while opening camera , camera services      d/onresume﹕ camera has been resumed.      w/camerabase﹕ error occurred while connecting camera: 0.      d/onresume﹕ fail connect camera service      getting error in inside try block. have used camera permission in manifest file.

error self hint problem,your missing add camera permission in androidmanifest.xml :

<uses-permission android:name="android.permission.camera" />

also add uses-feature if required :

<uses-feature         android:name="android.hardware.camera"         android:required="false" />

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