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>