Android读取手机联系人信息

package com.example.contentprovider;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.database.Cursor;import android.os.Bundle;import android.provider.ContactsContract;import android.widget.ArrayAdapter;import android.widget.ListView;public class MainActivity extends Activity {    private ListView contactsView;    private ArrayAdapter<String> adapter;    private List<String> contactslist = new ArrayList<String>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        contactsView = (ListView) findViewById(R.id.contacts_view);        adapter = new ArrayAdapter<String>(this,                android.R.layout.simple_list_item_1, contactslist);        contactsView.setAdapter(adapter);        readContacts();    }    private void readContacts() {        Cursor cursor = null;        try {            cursor = getContentResolver().query(                    ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,                    null, null, null);            while (cursor.moveToNext()) {                //获取联系人姓名                String displayName = cursor                        .getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));                //获取联系人手机号                String number = cursor                        .getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));                                contactslist.add(displayName+"\n"+number);            }        } catch (Exception e) {            e.printStackTrace();        } finally{            if(cursor != null)                cursor.close();        }    }}
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