Camera

<uses-feature    android:name="android.hardware.camera2"    android:required="true"/>

public class MainActivity extends AppCompatActivity {
    private static final int CAMERA_REQUEST = 1888;
    ImageView imageView;

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

        imageView = (ImageView)this.findViewById(R.id.imageView);
        Button photbutton= (Button) this.findViewById(R.id.button);

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

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

}