android如何获取手机联系人的数据库示例代码

 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> */ 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phone private String uri_phone = "content://com.android.contacts/data/phones"; //直接获取data表中数据类型是emali private 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> data = new ArrayList<>(); private ContentResolver contentResolver;//用来访问数据 @Override protected 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adapter private List> 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> list = new ArrayList<>(); while (cursor != null && cursor.moveToNext()) { String _id = cursor.getString(0); String displayName = cursor.getString(1); Map 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; } }