<uses-permission android/130564.html">android/208530.html">android:name="android.permission.SYSTEM_ALERT_WINDOW" />

import android.content.Context;import android.graphics.PixelFormat;import android.graphics.Point;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.WindowManager;import android.widget.ImageView;import android.widget.Toast;import com.android.view.FloatMessagePopleDialog;/** * Created by liupanpan on 2017/3/16. */public class FloatMessagerMainWindow { private Context context; private View view; private WindowManager.LayoutParams mParams = null; private WindowManager windowManager = null; private static FloatMessagerMainWindow floatMessagerMainWindow; public FloatMessagerMainWindow(Context context, View view) {  this.context = context;  this.view = view;  showWindow(context); } public static FloatMessagerMainWindow getFloatMessagerMainWindow(Context context, View view) {  if (floatMessagerMainWindow == null) {   synchronized (FloatMessagerMainWindow.class) {    if (floatMessagerMainWindow == null) {     floatMessagerMainWindow = new FloatMessagerMainWindow(context, view);    }   }  }  return floatMessagerMainWindow; } private void showWindow(final Context context) {//  if (!isWindowDismiss) {//   Log.e(TAG, "view is already added here");//   return;//  }//  isWindowDismiss = false;  if (windowManager == null) {   windowManager = (WindowManager) context.getApplicationContext().getSystemService(Context.WINDOW_SERVICE);  }  Point size = new Point();  windowManager.getDefaultDisplay().getSize(size);  int screenWidth = size.x;  int screenHeight = size.y;  mParams = new WindowManager.LayoutParams();  mParams.packageName = context.getPackageName();  mParams.width = WindowManager.LayoutParams.WRAP_CONTENT;  mParams.height = WindowManager.LayoutParams.WRAP_CONTENT;  mParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL    | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR    | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;  mParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;//  mParams.softInputMode = WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE |//    WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN;  mParams.format = PixelFormat.RGBA_8888;  mParams.gravity = Gravity.LEFT | Gravity.TOP;  mParams.x = screenWidth - dp2px(context, 450);  mParams.y = screenHeight - dp2px(context, 550);  ImageView imageView = new ImageView(context);  imageView.setImageResource(R.mipmap.icon_tab_item_message_pressed);  imageView.setOnClickListener(new View.OnClickListener() {   @Override   public void onClick(View v) {    Toast.makeText(context, "image=========", Toast.LENGTH_SHORT).show();    View view = LayoutInflater.from(context).inflate(R.layout.float_pople_room_layout, null);    FloatMessagePopleDialog.getInstance(context, R.style.webviewTheme).setContextView(view);   }  });//  floatView = new AVCallFloatView(context);//  floatView.setParams(mParams);//  floatView.setIsShowing(true);  windowManager.addView(imageView, mParams); } private int dp2px(Context context, float dp) {  final float scale = context.getResources().getDisplayMetrics().density;  return (int) (dp * scale + 0.1f); }}

FloatMessagerMainWindow.getFloatMessagerMainWindow(context, null);