CODEWITHSUNDEEP
android
HelloCW
HelloCW

Reputation: 2255

Does LocalBroadcastManager only work in the one Activity?

I have read the doc how to use LocalBroadcastManager?.

It works well in the SMSMain.java, and I can find the log info when I click btnToMore button in SMSMain.java:

Got message: This is A!

But I can't find the log info if I click btnNext button in StepName.java.

BTW, I open StepName.java by clicking the btnAddRule button in SMSMain.java .

SMSMain.java

package ui;
import info.dodata.smsforward.R;
import android.app.ListActivity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.v4.content.LocalBroadcastManager;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import bll.PublicPar;

public class SMSMain extends ListActivity { 


    private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String message = intent.getStringExtra("message");
            Log.d("receiver", "Got message: " +message );
        }
    };


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.sms_main);  

        Button btnAddRule = (Button) findViewById(R.id.btnAddRule);
        btnAddRule.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {               
                Intent intent = new Intent().setClass(getApplicationContext(),
                        ui.StepName.class);
                startActivityForResult(intent, 20);
            }
        });

        Button btnToMore = (Button) findViewById(R.id.btnToMore);
        btnToMore.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                  Intent intent = new Intent(PublicPar.LocalBroadcastForRule);
                  intent.putExtra("message", "This is A!");
                  LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(intent);

            }           
        });

        findViewById(R.id.btnClose).setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
             finish();
            }           
        });

    }



    @Override
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();
        LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver,
                  new IntentFilter(PublicPar.LocalBroadcastForRule));
    }


    @Override
    protected void onPause() {
        // TODO Auto-generated method stub
        super.onPause();
        LocalBroadcastManager.getInstance(this).unregisterReceiver(mMessageReceiver);
    }


}

StepName.java

package ui;
import info.dodata.smsforward.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.content.LocalBroadcastManager;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import bll.PublicPar;

public class StepName extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.sms_step_name); 


        Button btnNext = (Button) findViewById(R.id.btnNext);
        btnNext.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {   

                Intent intent = new Intent(PublicPar.LocalBroadcastForRule);    
                intent.putExtra("message", "This is B!");
                LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(intent);

                finish();
            }
        });     

    }
}

Upvotes: 1

Views: 1765

Answers (1)

Shobhit Puri
Shobhit Puri

Reputation: 26007

If you want to receive the LocalBroadcast in various different activities, you will have to register the receiver in all those receiving activities. The Sender activity sends/broadcasts notifications and the receiver activity that watches for notifications has to register the Broadcast Receiver for receiving the notifications.

Upvotes: 3

Related Questions