Android中通过ContentProvider来获取系统联系人

需要注意的是，要想获取系统联系人，首先应在AndroidManifest中获取读取联系人权限，即添加如下代码：

      <uses-permission android:name="android.permission.READ_CONTACTS" />

      <uses-permission android:name="android.permission.WRITE_CONTACTS" />

如果使用模拟器运行时，需要先在模拟器里面添加一些联系人，手机运行的话，如果有联系人就不需要添加了，否则也需要添加。

MainActivity代码如下：

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.content.ContentResolver;

import android.database.Cursor;

import android.os.Bundle;

import android.provider.ContactsContract;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ListView;

public class MainActivity extends Activity implements OnClickListener {

private Button btn;

private ListView listView;

private Cursor cursor1, cursor2;

private ContentResolver resolver;

private List<Person> list;

private Person person;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

btn = (Button) findViewById(R.id.btn);

listView = (ListView) findViewById(R.id.listView);

resolver = getContentResolver();

btn.setOnClickListener(this);

list = new ArrayList<Person>();

}

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

if (v.getId() == R.id.btn) {

cursor1 = resolver.query(ContactsContract.Contacts.CONTENT_URI,

null, null, null, null);

while (cursor1.moveToNext()) {

person = new Person();

String id = cursor1.getString(cursor1

.getColumnIndex(ContactsContract.Contacts._ID));

String name1 = cursor1

.getString(cursor1

.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));

person.setName(name1);

cursor2 = resolver.query(

ContactsContract.CommonDataKinds.Phone.CONTENT_URI,

null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID

+ "=" + id, null, null);

while (cursor2.moveToNext()) {

String number1 = cursor2

.getString(cursor2

.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

person.setNumber(number1);

}

list.add(person);

}

listView.setAdapter(new MyBaseAdapter(list, MainActivity.this));

}

}

}

activity_main布局如下：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <Button

        android:id="@+id/btn"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="获取系统联系人"

        android:textSize="20sp" />

    <ListView

        android:id="@+id/listView"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" >

    </ListView>

</LinearLayout>

MyBaseAdapter代码如下：

import java.util.List;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.TextView;

public class MyBaseAdapter extends BaseAdapter {

private List<Person> list;

private Person person;

private Context context;

public MyBaseAdapter(List<Person> list, Context context) {

super();

this.list = list;

this.context = context;

}

@Override

public int getCount() {

// TODO Auto-generated method stub

return list.size();

}

@Override

public Object getItem(int position) {

// TODO Auto-generated method stub

return list.get(position);

}

@Override

public long getItemId(int position) {

// TODO Auto-generated method stub

return position;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

// TODO Auto-generated method stub

LayoutInflater flater = (LayoutInflater) context

.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

if (convertView == null) {

convertView = flater.inflate(R.layout.linear, parent, false);

}

TextView name = (TextView) convertView.findViewById(R.id.name);

TextView number = (TextView) convertView.findViewById(R.id.number);

name.setText(list.get(position).getName());

number.setText(list.get(position).getNumber());

return convertView;

}

}

linear布局：

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="horizontal" >

    <TextView

        android:id="@+id/name"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:textSize="20dp" />

    <TextView

        android:id="@+id/number"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginLeft="20dp"

        android:textSize="20dp" />

</LinearLayout>

Person代码如下：

public class Person {

private String name;

private String number;

public Person() {

super();

}

public Person(String name, String number) {

super();

this.name = name;

this.number = number;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getNumber() {

return number;

}

public void setNumber(String number) {

this.number = number;

}

@Override

public String toString() {

return "Person [name=" + name + ", number=" + number + "]";

}

}