学步园

<span style="font-size:18px;"> <!-- 注册通讯录的读写权限 -->
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />

lt;!-- .表示上面 manifest 标签中 package属性的值 -->
<activity
android:name=".DemoActivity"
android:label="选择联系人" >
</activity></span>

<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" >

<EditText
android:id="@+id/textView"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />

<Button
android:id="@+id/button1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:onClick="click"
android:text="选择一个联系人" />

<EditText
android:id="@+id/textView2"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />

<Button
android:id="@+id/button2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:onClick="click2"
android:text="选择第二个联系人" />

</LinearLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<ListView
android:id="@+id/lv"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
</ListView>

</LinearLayout>

package com.example.getresultdata;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends Activity {
private TextView textView;
private TextView textView2;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
textView = (TextView) findViewById(R.id.textView);
textView2 = (TextView) findViewById(R.id.textView2);
}

/**
* 第一个按钮的点击事件
*
* @param view
*/
public void click(View view) {
Intent intent = new Intent(this, DemoActivity.class);
// startActivity(intent);
startActivityForResult(intent, 1);// 请求码
// 用于区分请求的数据,如果只有一个请求(按钮),这个code可以为0,可以不考虑他的值
}

/**
* 第二个按钮的点击事件
*
* @param view
*/
public void click2(View view) {
Intent intent = new Intent(this, DemoActivity.class);
// startActivity(intent);
startActivityForResult(intent, 2);// 请求码
}

@Override
/**
* 当跳转的activity(被激活的activity)使用完毕,销毁的时候调用该方法
*/
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (data != null) {
String name = data.getStringExtra("name");
if (requestCode == 1) {// 因为有2个按钮,所以要区分是触发了那个按钮的单击事件,然后把返回的数据放到对应的EditText中
textView.setText(name);
} else if (requestCode == 2) {
textView2.setText(name);
}
}

}

}

package com.example.getresultdata;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.content.ContentResolver;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class DemoActivity extends Activity {
private ListView listView;
private List<String> data;

@Override www.2cto.com
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.demo);
listView = (ListView) findViewById(R.id.lv);// 初始化控件
data = getAllContacts();// 获取所有的联系人姓名
listView.setAdapter(new MyAdapter());
listView.setOnItemClickListener(new OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
TextView textView = (TextView) view;
String name = textView.getText().toString();
Intent intent = new Intent();
intent.putExtra("name", name);// 放入返回值
setResult(0, intent);// 放入回传的值,并添加一个Code,方便区分返回的数据
finish();// 结束当前的activity,等于点击返回按钮
}

});
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

/**
* 内部类,为listview添加数据,构成联系人列表
*
* @author w
*
*/
public class MyAdapter extends BaseAdapter {

@Override
public int getCount() {
// TODO Auto-generated method stub
return data.size();// 返回listview的总长度
}

@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;// 返回当前列表的位置
}

@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;// 返回当前列表位置
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
TextView tv = new TextView(DemoActivity.this);
tv.setTextSize(25);// 设置显示文本的大小,
tv.setTextColor(Color.RED);// 设置显示文本的颜色
tv.setText(data.get(position));// 在对应的位置设置联系人数据
return tv;
}

}

/**
* 获取所有联系人的姓名
*
* @return
*/
private List<String> getAllContacts() {
List<String> list = new ArrayList<String>();
// 或者uri==ContactsContract.Contacts.CONTENT_URI
Uri uri = Uri.parse("content://com.android.contacts/contacts");
ContentResolver resolver = this.getContentResolver();
Cursor cursor = resolver.query(uri, null, null, null, null);
while (cursor.moveToNext()) {
String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
list.add(name);
}
cursor.close();
return list;
}
}