Android学习 - 悬浮控件

来源：互联网发布：石田电子称软件编辑：程序博客网时间：2024/06/09 13:47

不多说直接代码，看注释就成。

FloatView：

public class FloatView extends View {private String TAG = getClass().getName();private float mTouchStartX;private float mTouchStartY;private float x;private float y;private WindowManager manager;private WindowManager.LayoutParams params;public FloatView(Context context) {super(context);// 获取WindowManagermanager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);// 设置LayoutParams(全局变量）相关参数params = new WindowManager.LayoutParams();params.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT; // 系统提示类型,重要params.format = 1;params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE; // 不能抢占聚焦点params.flags = params.flags| WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH;params.flags = params.flags| WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS; // 排版不受限制params.alpha = 1.0f;params.gravity = Gravity.LEFT | Gravity.TOP; // 调整悬浮窗口至左上角// 以屏幕左上角为原点，设置x、y初始值params.x = 0;params.y = 0;// 设置悬浮窗口长宽数据params.width = 140;params.height = 140;// 显示myFloatView图像manager.addView(this, params);}@Overridepublic boolean onTouchEvent(MotionEvent event) {// 获取相对屏幕的坐标，即以屏幕左上角为原点x = event.getRawX();y = event.getRawY() - 25; // 25是系统状态栏的高度Log.i("currP", "currX" + x + "====currY" + y);switch (event.getAction()) {case MotionEvent.ACTION_DOWN:// 获取相对View的坐标，即以此View左上角为原点mTouchStartX = event.getX();mTouchStartY = event.getY();break;case MotionEvent.ACTION_MOVE:updateViewPosition();break;case MotionEvent.ACTION_UP:updateViewPosition();mTouchStartX = mTouchStartY = 0;break;}return true;}private void updateViewPosition() {// 更新浮动窗口位置参数params.x = (int) (x - mTouchStartX);params.y = (int) (y - mTouchStartY);manager.updateViewLayout(this, params);}public void clear() {manager.removeView(this);}}

使用方式MainActivity：

public class MainActivity extends Activity {private FloatView mLayout;/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);showView();}private void showView() {mLayout = new FloatView(this);mLayout.setBackgroundResource(R.drawable.ic_launcher);}@Overridepublic void onDestroy() {super.onDestroy();// 在程序退出(Activity销毁）时销毁悬浮窗口mLayout.clear();}}

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