Camera basics:Delegating to system cam

MainActivity.java

public class MainActivity extends AppCompatActivity {
    ImageView ivTemp;
    Button btCallCameraThumbnail;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        ivTemp = findViewById(R.id.iv_tmpcheck);
        btCallCameraThumbnail = findViewById(R.id.bt_call_camera_thumbnail);
        
        btCallCameraThumbnail.setOnClickListener(v -> callCameraForThumbnail());
    }

    private void callCameraForThumbnail() {
        //todo
    }
}