Camera error: Cannot connect to the camera

Question

I want to use the built-in camera functionality of a device. having read the documentation, this is the method I am using

private void dispatchTakePictureIntent() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
        startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
    }
}

In the manifest I added the usage:

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

However, when I invoke the method, the error dialog appears. Why is that?

Answer 1

Using camera with ACTION_IMAGE_CAPTURE intent with target API 23 or higher requires camera permission. You must request this permission at runtime.

Here you can find a video tutorial on this topic.

Answer 2

If you want to open the camera on button click, use the code below.

Initialize the button and image view within the onCreate() method.

photoButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
            startActivityForResult(cameraIntent, CAMERA_REQUEST); 
        }
    });
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    if (requestCode == CAMERA_REQUEST && resultCode == Activity.RESULT_OK) {  
        Bitmap photo = (Bitmap) data.getExtras().get("data"); 
        if(photo!=null)
            imageView.setImageBitmap(photo);
    }  
}