플로팅 윈도

360이 네트워크 속도를 감시하는 그 플로팅 창과 유사하다

public class FloatWindowService extends Service {

	WindowManager wm = null;

	WindowManager.LayoutParams wmParams = null;

	View view;

	private float mTouchStartX;
	private float mTouchStartY;

	private float x;
	private float y;

	@Override
	public void onCreate() {

		super.onCreate();
		setForeground(true);
		view = LayoutInflater.from(this).inflate(R.layout.float_window, null);
	}

	@Override
	public void onStart(Intent intent, int startId) {
		super.onStart(intent, startId);
		createView();
	}

	private void createView() {
		wm = (WindowManager) getApplicationContext().getSystemService("window");

		wmParams = new WindowManager.LayoutParams();
		wmParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;
		wmParams.flags |= WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
		wmParams.gravity = Gravity.LEFT | Gravity.TOP;

		wmParams.x = 0;
		wmParams.y = 0;

		wmParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
		wmParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
		wmParams.format = PixelFormat.RGBA_8888;

		wm.addView(view, wmParams);

		view.setOnTouchListener(new OnTouchListener() {

			public boolean onTouch(View v, MotionEvent event) {

				x = event.getRawX();
				y = event.getRawY();

				switch (event.getAction()) {

				case MotionEvent.ACTION_DOWN:
					mTouchStartX = event.getX();
					mTouchStartY = event.getY() + view.getHeight() / 2;
					break;

				case MotionEvent.ACTION_MOVE:
					updateViewPosition();
					break;

				case MotionEvent.ACTION_UP:
					updateViewPosition();
					mTouchStartX = mTouchStartY = 0;
					break;
				}

				return true;
			}
		});
	}

	private void updateViewPosition() {

		wmParams.x = (int) (x - mTouchStartX);
		wmParams.y = (int) (y - mTouchStartY);
		wm.updateViewLayout(view, wmParams);
	}

	@Override
	public IBinder onBind(Intent intent) {
		return null;
	}
}

플로팅 창의layout은 스스로 추가하십시오. 클릭 이벤트는 onClickListener에 등록하면 됩니다
주의
1. 안드로이드 매니페스트에 있어야 합니다.xml에permission 추가

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

2. 이 플로팅 창은 실질적으로 하나의 서비스이기 때문에 반드시 성명해야 한다

<service
    android:name="FloatWindowService"
    android:enabled="true" />