Show dialog alert from a non-activity class in android

Question

I want to show an Alert Dialog via AlertDialogManager class to a non-activity class DeviceAdminReceiverSample\'s method onDisabl

Answer 1

Here's a quick method of properly performing this task that has done the job for me. Basically, what you would do is just create a new thread.

1. Declare a public and static variable with a type that matches the original activity class.

   public static Activity1 activity;

Activity1 is the class that the variable resides in.

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2. Upon calling the method onCreate();, set the variable to be equal to the context of the activity, otherwise known as this.

Example:

@Override 
    protected void onCreate( Bundle savedInstanceState ) {
    super.onCreate( savedInstanceState );
    activity = this;
}

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3. Since we now have the context of the activity, we can use it to create a function with an alert dialog by using the runOnUiThread(); method inside of the function that will call the alert dialog. We would use a new Runnable() for the runnable action required for runOnUiThread();, and to have the alert dialog actually open, we would override the run function of a runnable item and place the code for the alert dialog in there.

Example function:

public static void exampleDialog(){
Activity1.activity.runOnUiThread(new Runnable){
@Override
    public void run(){
    //alert dialog code goes here.  For the context, use the activity variable from Activity1.
        }
    }
}

Hope this helps :)