ContactPicker(选择联系人) 详解
ContactPicker:用户可以选择一个联系人.
1. 创建ContactPicker活动(Activity)
位置: java->package-> ContactPicker.java
package mzx.spike.contactpicker.app;
import android.app.Activity;
import android.content.ContentUris;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
/**
* Created by C.L.Wang on 14-3-20.
*/
public class ContactPicker extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Cursor c = getContentResolver().query(
ContactsContract.Contacts.CONTENT_URI, null, null, null, null
);
String[] from = new String[]{ContactsContract.Contacts.DISPLAY_NAME_PRIMARY};
int[] to = new int[]{R.id.itemTextView};
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.listitemlayout, c, from, to, 0);
ListView lv = (ListView)findViewById(R.id.contactListView);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new ListView.OnItemClickListener(){
public void onItemClick(AdapterView parent, View view, int pos, long id) {
c.moveToPosition(pos);
int rowId = c.getInt(c.getColumnIndexOrThrow(_id));
Uri outURI = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, rowId);
Intent outData = new Intent();
outData.setData(outURI);
setResult(Activity.RESULT_OK, outData);
finish();
}
});
}
}
详解:
1. 创建一个活动继承Activity, 显示activity_main界面;
2. 创建游标Cursor遍历存储在联系人列表中的联系人;
3. 构造简单游标适配器(SimpleCursorAdapter), 注意此方法标记为遗弃, 后面需要加上参数0, 版本SDK11+;
4. 将适配器绑定至ListView, setAdapter();
5. 添加项目点击事件(setOnItemClickListener), 将游标移植点击位置, 取出rowID, 构造URI, 将URI绑定至Intent,;
6. 返回结果, setResult(), 结果码(Activity_RESULT_OK) 和 Intent;
2. 修改activity_main.xml
位置: res->layout->activity_main.xml
添加ListView, ContactPicker会调用此布局(layout);
3. 创建listitemlayout.xml
位置: res->layout->listitemlayout.xml
TextView显示ListView中的每一个联系人, ContactPicker会调用此布局(layout);
4. 创建测试布局contactpickertester.xml
位置: res->layout->contactpickertester.xml
TextView显示选择的联系人,Button选择按钮, 启动界面;
5. 创建测试类ContactPickerTester.java
位置: java->package->ContactPickerTester.java
package mzx.spike.contactpicker.app;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
/**
* Created by Administrator on 14-3-20.
*/
public class ContactPickerTester extends Activity {
public static final int PICK_CONTACT = 1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.contactpickertester);
Button button = (Button)findViewById(R.id.pick_contact_button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(Intent.ACTION_PICK, Uri.parse(content://contacts/));
startActivityForResult(intent, PICK_CONTACT);
}
});
}
@Override
public void onActivityResult(int reqCode, int resCode, Intent data) {
super.onActivityResult(reqCode, resCode, data);
switch (reqCode) {
case (PICK_CONTACT) : {
if (resCode == Activity.RESULT_OK) {
Uri contactData = data.getData();
Cursor c = getContentResolver().query(contactData,null, null, null, null);
c.moveToFirst();
String name = c.getString(c.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME_PRIMARY));
c.close();
TextView tv = (TextView)findViewById(R.id.selected_contact_textview);
tv.setText(name);
}
}
default: break;
}
}
}
1. 在onCreate()方法内, 重写按键监听事件(button.setOnClickListene());
2. 在onClick()方法中, 指定Intent.ACTION_PICK动作, 和联系人数据库(content://contacts/);
3. 重写onActivityResult()事件, 处理动作返回值, reqCode, 请求码, resCode, 结果码, data, Intent数据;
4. 提取数据, 更新ViewText的内容;
6. 修改Manifest, 进行注册
位置: root->AndroidManifest.xml
1. 注册ContactPicker, intent-filter, 动作PICK, 种类DEFAULT(默认动作);
2. 注册ContactPickerTester, 启动(MAIN)程序;
7. 运行程序
代码下载: http://download.csdn.net/detail/u012515223/7072781
