设想一下：由当前Activity跳转到其它Activity，从其它Activity再返回到当前Activity时，如何获取其它Activity存放的数据？下面用一个例子讲解，
点击selsect按钮跳转到另一界面，同时选择一个电话号码；然后将这个电话号码带回来显示在当前界面的EditText上。
1.代码实现：
（1）ResultActivity.class
/**
*结果界面
*/ public class ResultActivity extends AppCompatActivity { private static final int REQUEST_CODE_1 = 0x1;//请求码
private EditText et;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_result); et = (EditText) findViewById(R.id.et_phone_data); } /**
* 选择一个电话号码
* @param view
*/
public void selectClick(View view){
Intent intent = new Intent(this,PhoneListActivity.class);
//参数：intent,请求编码
startActivityForResult(intent,REQUEST_CODE_1); } //重写该方法来处理返回的结果
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==REQUEST_CODE_1 && resultCode==RESULT_OK){
String nums = data.getStringExtra("no");
et.setText(nums);
}
} /**
* 拨打电话--弹出手机里拨打电话的界面
* @param view
*/
public void CallClick(View view){
String phoneNum = et.getText().toString();
Intent intent = new Intent(); intent.setAction(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:"+phoneNum));
startActivity(intent);
} }
（2）PhoneListActivity.class
/**
*选择电话号码界面
*/ public class PhoneListActivity extends AppCompatActivity {
private ListView lv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_phone_list); lv = (ListView) findViewById(R.id.lv_listView_phone); final String[] numbers = {"18253563602","18810623657","15949822985","15854388317","15275323389","13521205590"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,android.R.id.text1,numbers);
lv.setAdapter(adapter);
//每一项的单击事件
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String no = numbers[position];
Intent intent = new Intent();
intent.putExtra("no",no);
setResult(RESULT_OK,intent);//设置返回码
finish();//结束当前界面
}
});
} }
（3）activity_result.xml
<?xml version="1.0" encoding="utf-8"?>
<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:orientation="vertical"
tools:context="com.langdon.taiyang.androidtest.activity.ResultActivity"> <EditText
android:id="@+id/et_phone_data"
android:hint="请选择一个电话号码"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/bt_phone_select"
android:text="select"
android:onClick="selectClick"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<Button
android:id="@+id/bt_phone_call"
android:text="call"
android:onClick="CallClick"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
（4）activity_phone_list.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_phone_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.langdon.taiyang.androidtest.activity.PhoneListActivity">
<ListView
android:id="@+id/lv_listView_phone"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</RelativeLayout>
2.运行结果：（选择15275323389的电话号码，并将数据返回，显示在当前界面的EditText上）