Detailed explanation of Android global pop-up dialog SYSTEM_ALERT

In order to realize the monitoring of multiple devices login in the project, an account needs to pop up a dialog box on the device when logging in to another device, so the global dialog box is used.

Plan 1.

1. Sometimes global pop-up dialog boxes are used in development, but permissions must be applied in manifest:

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

2. Create Dialog

 builder=new (this);
  (.logo_mini);
  ("Downline notification").setMessage("This account is logged in on another Android device.")
  .setPositiveButton("Re-Login", new () {

   @Override
   public void onClick(DialogInterface dialog, int which) {
    //do somthing
   }
  }).setNegativeButton("quit",new () {

   @Override
   public void onClick(DialogInterface dialog, int which) {
    Intent i=new Intent(,);
    (Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(i);
   }
  });
  alertDialog = ();
  (false);
  (false);
  ().setType(.TYPE_SYSTEM_ALERT);
  ();

Note that you want to set the Window type of Dialog to .TYPE_SYSTEM_ALERT.

Plan II.

Problems caused by adoption plan one:

When installing the application, the user will ask the user whether to authorize it.

At the same time, on Xiaomi phones, the system pop-up box is prohibited by default. The system pop-up box in the application will not be able to pop-up

So can we not apply for system permissions and then pop up a prompt box to prompt the user?

Here we can change our thinking. Since the system pop-up box cannot pop up, we will not use the system pop-up box and give it an Activity substitution. But at this time, please note that when the Service is in or startActivity in ApplicationContext, you should add additional flags.tent.FLAG_ACTIVITY_NEW_TASK:

Intent i=new Intent(this,);
(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(i);
//In the code, ActDialog is actually an Activity to apply the theme to it @android:style///Make the activity like a Dialog style

This solves the problem that permission application and the global Dialog cannot be displayed by default in Xiaomi mobile phones.

Finally, I would like to add that in Plan 1, you can pop up a dialog box without applying for permissions. Change the popup Window type to LayoutParams.TYPE_TOAST, but this type of popup box cannot accept event processing.

Implementing global dialog boxes using WindowManager

/**
   * Show pop-up box
   *
   * @param context
   */
 public static void showPopupWindow(final Context context, final DialogCallback callback) {
  // Get WindowManager  final WindowManager mWindowManager = (WindowManager) (Context.WINDOW_SERVICE);


  final  params = new ();
  // type   = .TYPE_SYSTEM_ALERT;
  // Set flag   = .FLAG_ALT_FOCUSABLE_IM | .FLAG_NOT_FOCUSABLE;
  // If .FLAG_NOT_FOCUSABLE is set, the pop-up View cannot receive the Back key event  // The transparent mask that does not set this pop-up box will be displayed as black   = ;
  // FLAG_NOT_TOUCH_MODAL does not block the event to the subsequent window  // Set FLAG_NOT_FOCUSABLE The floating window is small, and the application icon behind it changes from not being long-press to being long-pressible  // If this flag is not set, there will be problems with the home page's screen stroke   = .WRAP_CONTENT;
   = .WRAP_CONTENT;
   = ;
  TextView textView = new TextView(context);
  ("sfgsfdsfbsadfbasdfg");
  (100);

  final View mView = (context).inflate(.item_dialog_exit, null);
  TextView tv_itemdialog_title = (TextView) (.tv_itemdialog_title);
  TextView tv_itemdialog_ok = (TextView) (.tv_itemdialog_ok);
  TextView tv_itemdialog_close = (TextView) (.tv_itemdialog_close);

  tv_itemdialog_ok.setText("Re-Login");
  tv_itemdialog_close.setText("Login");
  tv_itemdialog_title.setText("This account is logged in on other devices. If you are not operating, please modify your password in time to prevent information leakage.");
  tv_itemdialog_ok.setOnClickListener(new () {
   @Override
   public void onClick(View v) {
    // Hide pop-up window    (mView);
    ();
   }
  });

  tv_itemdialog_close.setOnClickListener(new () {
   @Override
   public void onClick(View v) {
    (mView);
    ();
   }
  });

  (textView, params);
 }

The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.

Detailed explanation of Android global pop-up dialog SYSTEM_ALERT_WINDOW permissions