Android 警报对话框已经显示？

Question

如果AlertDialog 已经显示，我该如何阻止它显示？我到处搜索并使用不同的解决方案来为我的项目工作，但是我有一个循环，每 5 秒运行一次并调用 AlertDialog 方法（showSettingsAlert()），每次新的 AlertDialog 堆栈在前一个上.

我希望该方法在开始时检查它是否已显示对话框。

这是我的代码：

public AlertDialog Dialog;
public void showSettingsAlert() {
  if (Dialog != null && Dialog.isShowing()) {
    return;
  } else {
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(context);
    alertDialog.setTitle("GPS Disabled");

    alertDialog.setMessage("Do you want to go to location settings menu?");

    alertDialog.setPositiveButton("Location Settings", new DialogInterface.OnClickListener() {

      @
      Override
      public void onClick(DialogInterface dialog, int which) {
        Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
        context.startActivity(intent);
      }
    });

    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

      @
      Override
      public void onClick(DialogInterface dialog, int which) {
        dialog.cancel();
      }
    });
    Dialog = alertDialog.create();
    Dialog.show();
  }
}

Answer 1

这样做，

//check dialog open method
public boolean checkDialogOpen()
    {
        if (Dialog!= null && Dialog.isShowing())
            return true;
        else
            return false;
    }

您的更新代码，

public AlertDialog Dialog;

public void showSettingsAlert() {

  if (checkDialogOpen()) 
    return;

    AlertDialog.Builder alertDialog = new AlertDialog.Builder(context);
    alertDialog.setTitle("GPS Disabled");

    alertDialog.setMessage("Do you want to go to location settings menu?");

    alertDialog.setPositiveButton("Location Settings", new DialogInterface.OnClickListener() {

      @
      Override
      public void onClick(DialogInterface dialog, int which) {
        Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
        context.startActivity(intent);
      }
    });

    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

      @
      Override
      public void onClick(DialogInterface dialog, int which) {
        dialog.cancel();
      }
    });
    Dialog = alertDialog.create();
    Dialog.show();
  }
}