Apidemos-->Views-Lists-Cursor(people)-主要用到了获取手机联系人信息,属于内容提供者的范畴,要想了解这方面的内容,可以参考官方docs
/sdk/docs/guide/topics/providers/content-provider-basics.html
这里简单说下contentprovider;
contentprovider可实现不同应用程序之间的数据共享. 它是程序之间进行数据交换的api.
当一个程序需要把自己的数据暴露给其他程序使用时,该应用程序就可以通过提供contentprovider来实现,其他应用程序也可以通过来contentResolver操作contentprovider暴露的数据.
实例中用到了系统提供的联系人contentprovider:
常用的几个Uri有:
ContactsContract.Contacts.CONTENT_URL //管理联系人的URI
ContactsContract.Contacts.＿ID／／联系人Id
ContactsContract.Contacts.DISPLAY_NAME //联系人name 的Uri
ContactsContract.CommonDataKinds.Phone.CONTENT_URI 管理联系的电话的URI
ContactsContract.CommonDataKinds.Email.CONTENT_URI 管理联系人的E-mail的URI
随便写下自己犯了一个超级低级的错误就是.
居然采用for来遍历cursor,把 moveToNext丢了. 还有使用完关闭游标,加上mCursor.close();
package com.example.testmyviewslistscursorpeople;
import java.util.ArrayList;
import java.util.List;
import android.app.ListActivity;
import android.content.Context;
import android.database.Cursor;
import android.net.LocalSocketAddress.Namespace;
import android.os.Bundle;
import android.provider.ContactsContract.Contacts;
import android.provider.ContactsContract.CommonDataKinds.Phone;
import android.text.GetChars;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import com.example.testmyviewslistsactivateitems.R;
/**
*
* @author Administrator 仿效果slow loading apiDemos -- Views -Lists - Slow Adapter
*/
public class Main extends ListActivity {
private boolean mBusy = false;
public static List<String> mStrings = new ArrayList<String>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getPeople();
setListAdapter(new SlowAdapter(this));
// 设置选择模式为单选
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
// 首次加载设置选中items
getListView().setItemChecked(0, true);
getListView().setOnScrollListener(new OnScrollListener());
}
protected class OnScrollListener implements ListView.OnScrollListener {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
switch (scrollState) {
// The view is not scrolling.
case OnScrollListener.SCROLL_STATE_IDLE:
mBusy = false;
int first = view.getFirstVisiblePosition();
int count = view.getChildCount();
for (int i = 0; i < count; i++) {
TextView t = (TextView) view.getChildAt(i);
if (t.getTag() != null) {
t.setText(mStrings.get(first + i));
t.setTag(null);
}
}
break;
// The user is scrolling using touch, and their finger is still on
// the screen
case OnScrollListener.SCROLL_STATE_TOUCH_SCROLL:
mBusy = true;
break;
// The user had previously been scrolling using touch and had
// performed a fling.
// The animation is now coasting to a stop
case OnScrollListener.SCROLL_STATE_FLING:
mBusy = true;
break;
}
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
}
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
getListView().setItemChecked(position, true);
}
// 自定义适配器
private class SlowAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public SlowAdapter(Context context) {
mInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return mStrings.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
TextView text;
if (convertView == null) {
text = (TextView) mInflater.inflate(R.layout.main, null, false);
} else {
text = (TextView) convertView;
}
if (!mBusy) {
text.setText(mStrings.get(position).toString());
text.setTag(null);
} else {
text.setText("Loading...");
text.setTag(this);
}
return text;
}
}
protected void getPeople() {
final String[] CONTACT_PROJECTION = new String[] { Contacts._ID,
Contacts.DISPLAY_NAME, };
Cursor mCursor = getContentResolver().query(Contacts.CONTENT_URI,
CONTACT_PROJECTION, null, null, null);
while(mCursor.moveToNext()) {
String name =
mCursor.getString(mCursor.getColumnIndex(Contacts.DISPLAY_NAME));
mStrings.add(name);
}
mCursor.close();
}
}
实例源码
增加获取手机联系人电话的方法(只为了解获取方法,尚未和联系人一一对应,后续将改进):
protected void getPeople() {
final String[] CONTACT_PROJECTION = new String[] { Contacts._ID,
Contacts.DISPLAY_NAME };
//联系人
Cursor mCursor = getContentResolver().query(Contacts.CONTENT_URI,
CONTACT_PROJECTION, null, null, null);
//联系人电话
Cursor phones = getContentResolver().query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID, null, null);
while (mCursor.moveToNext()) {
// 获取联系人
String name = mCursor.getString(mCursor
.getColumnIndex(Contacts.DISPLAY_NAME));
mStrings.add(name);
if (phones.moveToNext()) {
//获取电话
String phone = phones.getString(phones
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
mStrings.add(phone);
}
}
//关闭资源
mCursor.close();
phones.close();
}