androd—Intent操作ContentProvider获取电话号码

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.widget.Toast; public class MyIntentContentDemo extends Activity {    private static final int PICK_CONTACT_SUBACTIVITY = 1;              // 定义操作标记    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        super.setContentView(R.layout.main);        Uri uri = Uri.parse("content://contacts/people");               // 连接URI        Intent intent = new Intent(Intent.ACTION_PICK, uri);            // 指定Intent        super.startActivityForResult(intent, PICK_CONTACT_SUBACTIVITY);// 调用Intent    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        switch (requestCode) {        case PICK_CONTACT_SUBACTIVITY:                                  // 接收返回的数据            Uri ret = data.getData();                                   // 单个数据Uri            String phoneSelection = ContactsContract.CommonDataKinds.Phone.CONTACT_ID                        + "=?";                                         // 设置查询条件            String[] phoneSelectionArgs = { String.valueOf(ContentUris                    .parseId(ret)) };                                   // 查询参数            Cursor c = super.managedQuery(                    ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,                    phoneSelection, phoneSelectionArgs, null);          // 查询全部手机号码            StringBuffer buf = new StringBuffer() ;                 // 用于接收全部电话            buf.append("电话号码是：") ;            for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) {   // 循环取数据                buf.append(c.getString(c.getColumnIndex(                        ContactsContract.CommonDataKinds.Phone.NUMBER)))                            .append("、");                               // 取出电话号码            }            Toast.makeText(this, buf, Toast.LENGTH_LONG).show();        // 显示信息        }    }}