不依赖于Activity的Android全局悬浮窗的实现

[java] view plain copy print&＃63;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&＃63;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; 
  } 
}