How to fix “Fail to connect to camera service” exception in Android emulator

Question

I\'m getting a Fail to connect to camera service exception when I run my Android app in the emulator. I\'ve read the various existing posts but none have fixed this. It is

Answer 1

1.Use below permissions in manifest file and always put permissions above Application tag.

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

2.Use Unlock while camera used by other service like MediaRecorder.

camera.unlock();
recorder.setCamera(camera);

2.Released camera properly, I prefer to use lock so become safely accessible for other application and second time use (In case if we reopen).

if (camera != null) {
        camera.lock();
        camera.stopPreview();
        camera.release();
        camera = null;
    }

Answer 2

With Android 6.0, this error can appened if you don't check for manifest authorisation :

    //If authorisation not granted for camera
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)
        //ask for authorisation
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, 50);
    else
        //start your camera
        this.startCamera();