Android - back 버튼 활용

public class MainActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

    @Override

    public void onBackPressed() {

        super.onBackPressed();

    }

}

[출처] [안드로이드] Back 버튼이 눌릴 때 처리 방법|작성자 도모네

[출처] [안드로이드] Back 버튼이 눌릴 때 처리 방법|작성자 도모네

super.onBackPressed();  사용시 어플리케이션 종료되거나 이전 Activity 이동.

두번 눌러서 종료시키기.

import android.app.Activity;
import android.widget.Toast;

public class BackPressCloseHandler {

	private long backKeyPressedTime = 0;
	private Toast toast;

	private Activity activity;

	public BackPressCloseHandler(Activity context) {
		this.activity = context;
	}

	public void onBackPressed() {
		if (System.currentTimeMillis() > backKeyPressedTime + 2000) {
			backKeyPressedTime = System.currentTimeMillis();
			showGuide();
			return;
		}
		if (System.currentTimeMillis() <= backKeyPressedTime + 2000) {
			activity.finish();
			toast.cancel();
		}
	}

	public void showGuide() {
		toast = Toast.makeText(activity,
				"\'뒤로\'버튼을 한번 더 누르시면 종료됩니다.", Toast.LENGTH_SHORT);
		toast.show();
	}
}