CODEWITHSUNDEEP
androidandroid-activity
enzom83
enzom83

Reputation: 8310

How to sending data to a specific activity that is already started?

Suppose we have two simple applications, so we have two different packages. Each of these packages has an Activity that can be launched by clicking the application icon. Suppose that the two activities are as follows:

Suppose we have launched the MyFirstActivity activity, so it is running. Could the MySecondActivity activity send data directly to the MyFirstActivity activity?

I would like the two activities (which are in different packages) can communicate with each other by exchanging data.

Upvotes: 1

Views: 1003

Answers (2)

Bhavesh Hirpara
Bhavesh Hirpara

Reputation: 22536

If you want to pass data without resuming on destroying activity then you have to make listener for that..

public class MyFirstActivity extends Activity implements OnDataChanged {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

}

@Override
public void onChange(int a) {
    Log.e("", "a : " + a);

}

}

MySecondActivity.java

public class MySecondActivity extends Activity {

private OnDataChanged mOnDataChanged;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    sendData(10);
}

public interface OnDataChanged {
    public void onChange(int a);
}

private void sendData(int a) {
    mOnDataChanged.onChange(a);
}

}

MySecondActivity is sending 10 to MyFirstActivity by implementing listener of MySecondActivity...

Upvotes: 0

ρяσѕρєя K
ρяσѕρєя K

Reputation: 132972

if you are launching MySecondActivity from MyFirstActivity then use this way:

in Activity MyFirstActivity:

Intent intent25 = new Intent(Intent.ACTION_MAIN).addCategory(
Intent.CATEGORY_LAUNCHER).setClassName("org.secondexample",
"org.secondexample.MySecondActivity").addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
.addFlags(Intent.FLAG_FROM_BACKGROUND).setComponent(new ComponentName("rg.secondexample",
"org.secondexample.MySecondActivity"));
Bundle bundle = new Bundle();
bundle.putString("Name", "test");
intent25.putExtras(bundle);
getApplicationContext().startActivity(intent25);

and in MySecondActivity oncreate()

Bundle bundle = this.getIntent().getExtras();
String name = bundle.getString("Name");

Upvotes: 1

Related Questions