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Saturday, August 20, 2011

Return result to onActivityResult()

To return result to onActivityResult() of calling activity, we can use the method setResult().



main activity

package com.exercise.AndroidResult;



import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;



public class AndroidResultActivity extends Activity {



final static int REQ_CODE = 1;



TextView tvResultCode;



/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);



tvResultCode = (TextView)findViewById(R.id.resultcode);



Button btnStartActivity2 = (Button)findViewById(R.id.startactivity2);

btnStartActivity2.setOnClickListener(new Button.OnClickListener(){



@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

Intent intent = new Intent(AndroidResultActivity.this, Activity2.class);

startActivityForResult(intent, REQ_CODE);

}});

}



@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

// TODO Auto-generated method stub

if(requestCode == REQ_CODE){

if (resultCode == RESULT_OK){

tvResultCode.setText("RESULT_OK");

}else if(resultCode == RESULT_CANCELED){

tvResultCode.setText("RESULT_CANCELED");

}

}

}

}





main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello"

/>

<Button

android:id="@+id/startactivity2"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="Start Activity 2"

/>

<TextView

android:id="@+id/resultcode"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

/>

</LinearLayout>





Sub-activity

package com.exercise.AndroidResult;



import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;



public class Activity2 extends Activity {



@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.main2);



Button btnReturnOK = (Button)findViewById(R.id.returnOK);

btnReturnOK.setOnClickListener(new Button.OnClickListener(){



@Override

public void onClick(View v) {

// TODO Auto-generated method stub

Intent i = new Intent();

setResult(RESULT_OK, i);

finish();

}});



Button btnReturnCancel = (Button)findViewById(R.id.returnCancel);

btnReturnCancel.setOnClickListener(new Button.OnClickListener(){



@Override

public void onClick(View v) {

// TODO Auto-generated method stub

Intent i = new Intent();

setResult(RESULT_CANCELED, i);

finish();

}});



}



}





<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello"

/>

<Button

android:id="@+id/returnOK"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="return OK"

/>

<Button

android:id="@+id/returnCancel"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="return Cancel"

/>

</LinearLayout>




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