这篇文章将为大家详细讲解有关Android怎么实现桌面悬浮小火箭效果，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
具体内容如下
思路
使用serivce在后台启动小火箭
小火箭使用windowmanager实现。
用ontoch监听实现小火箭的拖拽。
代码实现
public class RocketService extends Service { private WindowManager mWM; private View view; private int startX ; private int startY ; private LayoutParams params; @Override public IBinder onBind(Intent intent) { return null ; } @Override public void onCreate() { super .onCreate(); System. out .println("服务创建。。。。" ); mWM = (WindowManager) getSystemService(WINDOW_SERVICE ); winWidth = mWM.getDefaultDisplay(). getWidth(); winHeight = mWM .getDefaultDisplay().getHeight (); params = new WindowManager.LayoutParams(); params. height = WindowManager.LayoutParams.WRAP_CONTENT ; params. width = WindowManager.LayoutParams.WRAP_CONTENT ; params. flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE ; params. format = PixelFormat. TRANSLUCENT ; params. type = WindowManager.LayoutParams.TYPE_PHONE ; params. gravity = Gravity. LEFT + Gravity. TOP; view = LayoutInflater.from( this).inflate(R.layout. rocket , null ); //拿到 imageview，设置帧动画 ImageView ivRocket = (ImageView) view .findViewById(R.id. rocket); ivRocket.setImageResource(R.drawable. rocket ); AnimationDrawable drawable = (AnimationDrawable) ivRocket.getDrawable(); drawable.start(); mWM.addView( view, params); // 设置view的触摸事件，让它可以被拖拽 view.setOnTouchListener( new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent. ACTION_DOWN: startX = ( int ) event.getRawX(); startY = ( int ) event.getRawY(); break ; case MotionEvent. ACTION_MOVE: int dx = (int ) (event.getRawX() - startX ); int dy = (int ) (event.getRawY() - startY ); // 更新浮窗位置 params. x += dx; params. y += dy; // 限制窗口坐标不超过屏幕 if (params .x < 0) { params. x = 0; } if (params .x > winWidth - view .getWidth()) { params. x = winWidth - view .getWidth(); } if (params .y < 0) { params. y = 0; } if (params .y > winHeight - view .getHeight()) { params. y = winHeight - view .getHeight(); } mWM.updateViewLayout( view, params ); startX = ( int ) event.getRawX(); startY = ( int ) event.getRawY(); break ; case MotionEvent. ACTION_UP: // 手指抬起起，需要发射火箭，限定发射火箭的范围 if (params .x > 0 && params. x < winWidth && params. y > winHeight - 500) { sendRocket(); } break ; } return true ;// 不再把事件传递给onClick处理 } }); } private Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { int y = msg.arg1 ; params. y = y; mWM.updateViewLayout( view, params); } }; private int winWidth ; private int winHeight ; // 发射火箭 private void sendRocket() { // 用子线程更新y轴 new Thread(new Runnable() { @Override public void run() { int pos = 1000; for (int i=0; i <= 10; i++) { int y = pos-100*i; //休眠100ms发消息 try { Thread. sleep(100); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } Message msg = Message.obtain(); msg. arg1 = y; mHandler.sendMessage(msg); } } }).start(); } @Override public void onDestroy() { // TODO Auto-generated method stub super .onDestroy(); if (mWM != null && view != null) { mWM.removeView( view); view = null ; } }}关于“Android怎么实现桌面悬浮小火箭效果”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，使各位可以学到更多知识，如果觉得文章不错，请把它分享出去让更多的人看到。
