Broadcast Receivers And Fragments

I have this scenario implemented where I have a navigation drawer with nested fragments that are added to the back stack with tag. Every fragment has the following implemented: @Ov

Solution 1:

My case was to update the textfield in one of the fragments hosted by MainActivity.The simplest solution I found was this:--

In my MainActivity class retrieved the running instance of MainActivtiy.This is my MAinActivity

privatestaticMainActivity mainActivityRunningInstance;
    publicstaticMainActivitygetInstace(){
        return mainActivityRunningInstance;
    }
  @OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mainActivityRunningInstance =this;
----------
}

Now in Broadcast reciever's onRecieve method, get that instance and call the update method

@OverridepublicvoidonReceive(Context context, Intent intent) {
        if (intent.getAction().matches(Intents.PROVIDER_CHANGED_ACTION)) {
                String textValue="the text field value";
// the null check is for, if the activity is not running or in paused state, in my case the update was required onlyif the main activity is active or pausedif(MainActivity.getInstace()!=null)
                MainActivity.getInstace().updateUI(textValue);
}

Now for the part where we need to run the update in UIThread,The updateUI method of MainActivity will call the fragments update method.

publicvoidupdateUI(final String str) {
        MainActivity.this.runOnUiThread(newRunnable() {
            publicvoidrun() {
     //use findFragmentById for fragments defined in XML ((SimpleFragment)getSupportFragmentManager().findFragmentByTag(fragmentTag)).updateUI(str);
            }
        });
    }

and the final step is updating the fragment's text field

publicvoidupdateUI(String str){
        tv_content.setText(str);
    }

and Bingo, its done. I referred post to solve my issue. Hope it help others.