ContactPicker(选择联系人) 详解
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本文地址: http://blog.csdn.net/caroline_wendy/article/details/21629357
Android API: http://developer.android.com/reference/android/content/Intent.html
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
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