How to use

setContentView

method

in

com.nguyenhoanglam.sample.MainActivity

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  folderModeSwitch = findViewById(R.id.switch_folder_mode);
  multipleModeSwitch = findViewById(R.id.switch_multiple_mode);
  cameraOnlySwitch = findViewById(R.id.switch_camera_only);
  pickImageButton = findViewById(R.id.button_pick_image);
  launchFragmentButton = findViewById(R.id.button_launch_fragment);
  recyclerView = findViewById(R.id.recyclerView);
  pickImageButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
      start();
    }
  });
  launchFragmentButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
      launchFragment();
    }
  });
  adapter = new ImageAdapter(this);
  RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
  recyclerView.setLayoutManager(layoutManager);
  recyclerView.setAdapter(adapter);
}