Android--activity Get return value

Wrote a demo: SMS select the data transfer of the contact person

Main activity:

Import Android.os.bundle;import android.app.activity;import Android.content.intent;import Android.view.Menu;import Android.view.view;import Android.widget.edittext;public class Mainactivity extends Activity {@Overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main);} public void Click (View c) {//jump to select contact Activityintent intent = new Intent (this, contactactivity.class);//startactivity ( intent);//activity initiated with this API, when destroyed, the system will callback Onactivityresultstartactivityforresult (intent, 10);} public void Click2 (View v) {//jump to select Activityintent Intent for quick reply = new Intent (this, callbackactivity.class); Startactivityforresult (Intent, 20);} If an activity returns data when it is destroyed, this method is called to receive data//requestcode: to distinguish which activity//resultcode the data comes from: Used to differentiate what type of data is returned @overrideprotected void onactivityresult (int requestcode, int resultcode, Intent data) {//TODO Auto-generated method Stubsuper.onactivityresult (Requestcode, ResultCode, data); String name = Data.getstringextra ("Name "), if (Requestcode = =) {EditText et = (EditText) Findviewbyid (r.id.et); Et.settext (name);} else if (Requestcode = =) {EditText et_content = (EditText) Findviewbyid (r.id.et_content); Et_content.settext (name);}}}

Contact activity:

Import Android.app.activity;import android.content.intent;import Android.os.bundle;import Android.view.View;import Android.widget.adapterview;import Android.widget.adapterview.onitemclicklistener;import Android.widget.arrayadapter;import Android.widget.listview;public class Contactactivity extends Activity {@ overrideprotected void OnCreate (Bundle savedinstancestate) {//TODO auto-generated method Stubsuper.oncreate ( Savedinstancestate); Setcontentview (r.layout.activity_contact); ListView LV = (ListView) Findviewbyid (r.id.lv); final string[] objects = new string[]{"Xiao Zhi", "Brother forced", "world class XXX", "Country Service First"}; Lv.setadapter (New arrayadapter<string> (this, R.layout.item_listview, R.id.tv, objects));// Click to listen Lv.setonitemclicklistener (new Onitemclicklistener () {////When an entry is clicked, this method calls @overridepublic void for the ListView setting entry Onitemclick (adapterview<?> parent, View view,int position, long ID) {//activity passes data when returned, also by intent object intent data = new in Tent ();//encapsulates the data to be passed into the intent object Data.putextra ("name", Objects[position]);//The current activity is destroyed,The intent of data is passed to the Activitysetresult (1, data) that initiates the current activity;//destroys the current activityfinish ();});} @Overridepublic void onbackpressed () {//TODO auto-generated method Stubsuper.onbackpressed ();}}

Quick reply activity:

Import Android.app.activity;import android.content.intent;import Android.os.bundle;import Android.view.View;import Android.widget.adapterview;import Android.widget.adapterview.onitemclicklistener;import Android.widget.arrayadapter;import Android.widget.listview;public class Callbackactivity extends Activity {@ overrideprotected void OnCreate (Bundle savedinstancestate) {//TODO auto-generated method Stubsuper.oncreate ( Savedinstancestate); Setcontentview (r.layout.activity_contact); ListView LV = (ListView) Findviewbyid (r.id.lv); final string[] objects = new string[]{"No, no, no, roll Duzi", "daughter-in-law I was wrong, beg forgiveness", "Lao Tzu is the head of the household" };lv.setadapter (New arrayadapter<string> (this, R.layout.item_listview, R.id.tv, objects)); Lv.setonitemclicklistener (New Onitemclicklistener () {@Overridepublic void Onitemclick (adapterview<?> parent, View view,int position, long ID) {Intent data = new Intent ();d Ata.putextra ("name", Objects[position]); Setresult (2, data); Finish ();}});}}

<linearlayout xmlns:android= "http://schemas.android.com/apk/res/android" xmlns:tools= "http// Schemas.android.com/tools "android:layout_width=" match_parent "android:layout_height=" Match_parent "Android:paddi ngbottom= "@dimen/activity_vertical_margin" android:paddingleft= "@dimen/activity_horizontal_margin" Android: paddingright= "@dimen/activity_horizontal_margin" android:paddingtop= "@dimen/activity_vertical_margin" tools: Context= ".        Mainactivity "android:orientation=" vertical "> <linearlayout android:layout_width=" match_parent " android:layout_height= "wrap_content" android:orientation= "Horizontal" > <edittext Android Oid:id= "@+id/et" android:layout_weight= "1" android:layout_width= "0DP" android:layout_height= "Wrap_con Tent "android:hint=" Please enter the contact "/> <button android:layout_weight=" 0 "Android:layout_widt H= "Wrap_content" android:layout_height= "Wrap_coNtent "android:text=" + "android:onclick=" click "/> </LinearLayout> <edittext Android:id= "@+id/et_content" android:layout_weight= "1" android:layout_width= "Match_parent" android:l ayout_height= "0DP" android:hint= "Please enter SMS Content" android:gravity= "top"/><button android:layout_wi Dth= "Wrap_content" android:layout_height= "wrap_content" android:text= "quick reply" android:onclick= "Click2"/>< Button android:layout_width= "wrap_content" android:layout_height= "wrap_content" android:text= "Send SMS"/>< /linearlayout>

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/res/ Android "    android:layout_width=" match_parent "    android:layout_height=" match_parent "    android:o rientation= "vertical" >        <listview         android:id= "@+id/lv"        android:layout_width= "Match_parent"        android:layout_height= "Match_parent"        ></ListView></LinearLayout>

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/res/ Android "    android:layout_width=" match_parent "    android:layout_height=" match_parent "    android:o rientation= "vertical" >        <textview         android:id= "@+id/tv"        android:layout_width= "Wrap_content"        android:layout_height= "wrap_content"        android:textsize= "20sp"        /></linearlayout>

Android--activity Get return value