由于代码上注释写的很清楚，可以直接运行成功。所以我就不说什么了，这个例子是疯狂android讲义上的范例，大家有书的可以看看，那本书挺不错的。ContentProvider是很重要的，但是一般不做系统级开发的不会涉及到，我纯粹是为了练习使用它。
package com.example.democontent;
import java.util.ArrayList;
import android.app.Activity;
import android.app.AlertDialog;
import android.database.Cursor;
import android.graphics.Color;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseExpandableListAdapter;
import android.widget.Button;
import android.widget.ExpandableListView;
import android.widget.TextView;
public class MainActivity extends Activity {
private Button button;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
allContants();
}
});
}
private void allContants() {
final ArrayList<String> names = new ArrayList<String>();
final ArrayList<ArrayList<String>> details = new ArrayList<ArrayList<String>>();
Cursor cursor = getContentResolver().query(
ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
while (cursor.moveToNext()) {
// 联系人的id
String contactId = cursor.getString(cursor
.getColumnIndex(ContactsContract.Contacts._ID));
// 联系人的姓名
String name = cursor.getString(cursor
.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
names.add(name);
// 联系人的多个电话
Cursor phones = getContentResolver().query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "="
+ contactId, null, null);
ArrayList<String> detail = new ArrayList<String>();
// 遍历插叙结果获取该联系人的多个电话号码
while (phones.moveToNext()) {
String phoneNumber = phones
.getString(phones
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
detail.add("电话号码:" + phoneNumber);
}
phones.close();
// 查找email
Cursor emails = getContentResolver().query(
ContactsContract.CommonDataKinds.Email.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Email.CONTACT_ID + "="
+ contactId, null, null);
// 遍历查询结果，获取多个联系人的email
while (emails.moveToNext()) {
String emailAddress = emails
.getString(emails
.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));
detail.add("邮件地址:" + emailAddress);
}
emails.close();
details.add(detail);
}
cursor.close();
// 加载result.xml界面布局代表的试图
View resultDialog = getLayoutInflater().inflate(R.layout.result, null);
// 获取加载视图上的id
ExpandableListView list = (ExpandableListView) resultDialog
.findViewById(R.id.expandableListView1);
// 获取视图当中的ExpandableListView对象
BaseExpandableListAdapter adapter = new BaseExpandableListAdapter() {
// 自定义的得到TextView的方法
private TextView getTextView() {
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, 64);
TextView textView = new TextView(MainActivity.this);
textView.setLayoutParams(lp);
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
textView.setPadding(36, 0, 0, 0);
textView.setTextSize(20);
textView.setTextColor(Color.RED);
return textView;
}
// 子选项是否被选中
public boolean isChildSelectable(int groupPosition,
int childPosition) {
// TODO Auto-generated method stub
return true;
}
// 是否有固定的id
public boolean hasStableIds() {
// TODO Auto-generated method stub
return true;
}
// 该方法决定每个组选项的外观,返回的是自定义的TextView
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
TextView textView = getTextView();
textView.setText(getGroup(groupPosition).toString());
return textView;
}
// 得到组的id号
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition;
}
// 得到组的个数
public int getGroupCount() {
// TODO Auto-generated method stub
return names.size();
}
// 得到组
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return names.get(groupPosition);
}
// 得到组的二级列表的个数
public int getChildrenCount(int groupPosition) {
// TODO Auto-generated method stub
return details.get(groupPosition).size();
}
// 得到组的二级列表视图
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
TextView textView = getTextView();
textView.setText(getChild(groupPosition, childPosition)
.toString());
return textView;
}
// 得到组的二级列表的id号
public long getChildId(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return childPosition;
}
// 得到组的二级列表中的一个元素
public Object getChild(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return details.get(groupPosition).get(childPosition);
}
};
list.setAdapter(adapter);
new AlertDialog.Builder(MainActivity.this).setView(resultDialog)
.setPositiveButton("确定", null).show();
}
}
main.xml布局文件只有一个按钮
<RelativeLayout 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" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="所有人信息" />
</RelativeLayout>
result.xml布局文件如下
<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" >
<ExpandableListView
android:id="@+id/expandableListView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ExpandableListView>
</LinearLayout>
重要的权限问题哈
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />