很多人在做手机联系人的apk时会遇到，如何获取手机联系人数据库的问题，在这里我就简单的将代码写一下
package com.example.song.lx_day14_contacts;import android.content.ContentResolver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;/*** 获取手机通讯录信息 展示并且修改* listview* simpleadapter* list<Map<String,String>>*/
public class MainActivity extends AppCompatActivity {private String uri_raw = "content://com.android.contacts/raw_contacts";//直接获取data表中的 数据类型是phoneprivate String uri_phone = "content://com.android.contacts/data/phones";//直接获取data表中数据类型是emaliprivate String uri_emalis = "content://com.android.contacts/data/emails";private String uri_data = "content://com.android.contacts/data";private ListView listView;private TextView empty;private SimpleAdapter adapter;private List<Map<String, String>> data = new ArrayList<>();private ContentResolver contentResolver;//用来访问数据@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);listView = ((ListView) findViewById(R.id.lv));empty = ((TextView) findViewById(R.id.empty));listView.setEmptyView(empty);//设置空视图adapter = new SimpleAdapter(this, data, R.layout.item, new String[]{"_id", "display_Name", "data1"}, new int[]{R.id.id, R.id.name, R.id.number});listView.setAdapter(adapter);contentResolver = getContentResolver();reloadListView();}private void reloadListView() {data.clear();data.addAll(selectData());adapter.notifyDataSetChanged();}//查询工作 用于查询data raw_contact标 返回list数据 在刷新adapterprivate List<Map<String, String>> selectData() {/*** 1.先查询raw 获取_id查出所有联系人* 2.循环查询-->根据_id去data表中（_id=raw_contacts_id）查询 data1数据*/Cursor cursor = contentResolver.query(Uri.parse(uri_raw), new String[]{"_id", "display_name"}, null, null, null);//cursor返回的cursor数量不定List<Map<String, String>> list = new ArrayList<>();while (cursor != null && cursor.moveToNext()) {String _id = cursor.getString(0);String displayName = cursor.getString(1);Map<String, String> map = new HashMap<>();map.put("_id", _id);map.put("display_Name", displayName);//根据_id 去data查手机号Cursor cursor1 = contentResolver.query(Uri.parse(uri_phone), new String[]{"data1"}, "raw_contact_id=?", new String[]{_id}, null);//循环拿到手机号StringBuffer sb = new StringBuffer();//这里循环拿到手机号是因为有时联系人中 你可能一个人有几个电话while (cursor1 != null && cursor1.moveToNext()) {sb.append(cursor1.getString(0) + "\n");}cursor1.close();map.put("data1", sb.toString());list.add(map);}cursor.close();return list;}
}
在这里不要忘记了添加权限
<uses-permission android:name="android.permission.READ_CONTACTS" /><uses-permission android:name="android.permission.WRITE_CONTACTS" />