@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mRxPermissions = RxPermissions.getInstance(this);
setContentView(R.layout.act_main);
mSurfaceView = (SurfaceView) findViewById(R.id.surfaceView);
}
public void enableCamera(View v) {
mRxPermissions
.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)
.flatMap(
should -> {
if (should) {
// User already denied the permission, but didn't
// checked "never ask again".
Toast.makeText(
MainActivity.this,
"Please please grant this permission !",
Toast.LENGTH_SHORT)
.show();
}
return mRxPermissions.request(Manifest.permission.CAMERA);
})
.subscribe(
granted -> {
if (granted) {
releaseCamera();
mCamera = Camera.open(0);
try {
mCamera.setPreviewDisplay(mSurfaceView.getHolder());
mCamera.startPreview();
} catch (IOException e) {
Log.e(TAG, "Error while trying to display the camera preview", e);
}
} else {
Toast.makeText(
MainActivity.this,
"Permission denied, can't enable the camera",
Toast.LENGTH_SHORT)
.show();
}
});
}