Sending Intent from BroadcastReceiver class to currently running activity

Question

I have a class which extends BroadcastReceiver. On receiving a SMS, I would like to pass information to my main activity class to display the text in a box (Append,

Answer 1

Modify your code as below.

 public class SmsReceiver extends BroadcastReceiver {
@Override 

public void onReceive(Context context, Intent intent)
    { 
        Intent i = new Intent(context, MainActivity.class);
            i.putExtra("updatedString","Hello");            i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_SINGLE_TOP);
            context.startActivity(i);
    } 
}

public class MainActivity extends Activity{

  private TextView results;
  @Override 
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Bundle extras = getIntent().getExtras();
        if(extras!=null){
            results = (TextView) findViewById(R.id.results);
            results.setVisibility(View.VISIBLE);
            results.append(extras.getString("updatedString"));
        } 

@Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
      //handle your intent here.Note this will be called even when activity first created.so becareful to handle intents correctly.
    }

}