不依赖于Activity的Android全局悬浮窗的实现

<!-- 显示顶层浮窗 --><uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

[java] view plain copy print?在CODE上查看代码片派生到我的代码片// 获取应用的Context  mContext = context.getApplicationContext();  // 获取WindowManager  mWindowManager = (WindowManager) mContext      .getSystemService(Context.WINDOW_SERVICE); 参数设置：  final WindowManager.LayoutParams params = new WindowManager.LayoutParams();  // 类型  params.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;  // WindowManager.LayoutParams.TYPE_SYSTEM_ALERT  // 设置flag  int flags = WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM;  // | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;  // 如果设置了WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE，弹出的View收不到Back键的事件  params.flags = flags;  // 不设置这个弹出框的透明遮罩显示为黑色  params.format = PixelFormat.TRANSLUCENT;  // FLAG_NOT_TOUCH_MODAL不阻塞事件传递到后面的窗口  // 设置 FLAG_NOT_FOCUSABLE 悬浮窗口较小时，后面的应用图标由不可长按变为可长按  // 不设置这个flag的话，home页的划屏会有问题  params.width = LayoutParams.MATCH_PARENT;  params.height = LayoutParams.MATCH_PARENT;  params.gravity = Gravity.CENTER; 

[java] view plain copy print?在CODE上查看代码片派生到我的代码片package com.robert.floatingwindow; import android.content.Context; import android.graphics.PixelFormat; import android.graphics.Rect; import android.view.Gravity; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.View.OnKeyListener; import android.view.View.OnTouchListener; import android.view.WindowManager; import android.view.View.OnClickListener; import android.view.WindowManager.LayoutParams; import android.widget.Button; /** * 弹窗辅助类 * * @ClassName WindowUtils * * */ public class WindowUtils {   private static final String LOG_TAG = "WindowUtils";   private static View mView = null;   private static WindowManager mWindowManager = null;   private static Context mContext = null;   public static Boolean isShown = false;   /**    * 显示弹出框    *    * @param context    * @param view    */   public static void showPopupWindow(final Context context) {     if (isShown) {       LogUtil.i(LOG_TAG, "return cause already shown");       return;     }     isShown = true;     LogUtil.i(LOG_TAG, "showPopupWindow");     // 获取应用的Context     mContext = context.getApplicationContext();     // 获取WindowManager     mWindowManager = (WindowManager) mContext         .getSystemService(Context.WINDOW_SERVICE);     mView = setUpView(context);     final WindowManager.LayoutParams params = new WindowManager.LayoutParams();     // 类型     params.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;     // WindowManager.LayoutParams.TYPE_SYSTEM_ALERT     // 设置flag     int flags = WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM;     // | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;     // 如果设置了WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE，弹出的View收不到Back键的事件     params.flags = flags;     // 不设置这个弹出框的透明遮罩显示为黑色     params.format = PixelFormat.TRANSLUCENT;     // FLAG_NOT_TOUCH_MODAL不阻塞事件传递到后面的窗口     // 设置 FLAG_NOT_FOCUSABLE 悬浮窗口较小时，后面的应用图标由不可长按变为可长按     // 不设置这个flag的话，home页的划屏会有问题     params.width = LayoutParams.MATCH_PARENT;     params.height = LayoutParams.MATCH_PARENT;     params.gravity = Gravity.CENTER;     mWindowManager.addView(mView, params);     LogUtil.i(LOG_TAG, "add view");   }   /**    * 隐藏弹出框    */   public static void hidePopupWindow() {     LogUtil.i(LOG_TAG, "hide " + isShown + ", " + mView);     if (isShown && null != mView) {       LogUtil.i(LOG_TAG, "hidePopupWindow");       mWindowManager.removeView(mView);       isShown = false;     }   }   private static View setUpView(final Context context) {     LogUtil.i(LOG_TAG, "setUp view");     View view = LayoutInflater.from(context).inflate(R.layout.popupwindow,         null);     Button positiveBtn = (Button) view.findViewById(R.id.positiveBtn);     positiveBtn.setOnClickListener(new OnClickListener() {       @Override       public void onClick(View v) {         LogUtil.i(LOG_TAG, "ok on click");         // 打开安装包         // 隐藏弹窗         WindowUtils.hidePopupWindow();       }     });     Button negativeBtn = (Button) view.findViewById(R.id.negativeBtn);     negativeBtn.setOnClickListener(new OnClickListener() {       @Override       public void onClick(View v) {         LogUtil.i(LOG_TAG, "cancel on click");         WindowUtils.hidePopupWindow();       }     });     // 点击窗口外部区域可消除     // 这点的实现主要将悬浮窗设置为全屏大小，外层有个透明背景，中间一部分视为内容区域     // 所以点击内容区域外部视为点击悬浮窗外部     final View popupWindowView = view.findViewById(R.id.popup_window);// 非透明的内容区域     view.setOnTouchListener(new OnTouchListener() {       @Override       public boolean onTouch(View v, MotionEvent event) {         LogUtil.i(LOG_TAG, "onTouch");         int x = (int) event.getX();         int y = (int) event.getY();         Rect rect = new Rect();         popupWindowView.getGlobalVisibleRect(rect);         if (!rect.contains(x, y)) {           WindowUtils.hidePopupWindow();         }         LogUtil.i(LOG_TAG, "onTouch : " + x + ", " + y + ", rect: "             + rect);         return false;       }     });     // 点击back键可消除     view.setOnKeyListener(new OnKeyListener() {       @Override       public boolean onKey(View v, int keyCode, KeyEvent event) {         switch (keyCode) {         case KeyEvent.KEYCODE_BACK:           WindowUtils.hidePopupWindow();           return true;         default:           return false;         }       }     });     return view;   } }