How to pass checked items to another activity?

Question

I got list of checked contacts.However, i need to pass these selected contacts to another activity and display in edit Text.Please help.Thanks

Answer 1

You have a few solutions...

1. You can use static fields in your Java classes
2. You can pack the data into Intents via Intent.putExtra

Option (1) is probably going to be the easiest and quickest if you are trying to send data between your own activities. Option (2) is what you must do if you wish to send data to Activities of another applications.

I suggest you read these Q&A first though as some cover this question in more depth...

Passing data of a non-primitive type between activities in android

Passing data between activities in Android

Switching activities/passing data between activities

Answer 2

You have to use an Intent to do so.

Example, to pass the data to an activity already running:

public void sendToActivity(Object data){
    Intent i = new Intent("SEND_DATA");
    i.putExtra("data", this.catchReports.get(data));
    sendBroadcast(i);
}

Then, you have to setup a listener in your receiving activity to catch the Broadcasted signal:

public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    // Sets the View of the Activity
    setContentView(R.layout.activity_layout);   
    registerReceiver(new CustomReceiver(this), new IntentFilter("SEND_DATA")); 
} 

With the following customreceiver:

public class CustomReceiver extends BroadcastReceiver {

    private MyActivity activity;

    public ReceiverEvent(MyActivity activity) {
        this.activity = activity;
    }

    public void onReceive(Context context, Intent i) {
        this.activity.doWhateverWithYourData(i.getParcelableExtra("newEvent"));
    }
}

Note that if you want to transport Objects other than integers, floats and strings, you have to make them Parcelable.