CursorAdapter Filter

关于使用AutoCompleteTextView和CursorAdapter查询电话联系人并找出电话号码
发表于50 天前 ⁄ Android, Android开发 ⁄ 暂无评论 ⁄ 被围观 热度 154˚+
学习到这部分遇见很多的问题，看了很多人讲的关于这部分的文章同时结合自己的测试总结如下：

 

程序的目地是在AutoCompleteTextView里面输入联系人名同时自动找出建议的联系人，选取某个联系人后得到该联系人的电话号码。

 

这里关键是实现一个自己的XXXXXAdapter 继承自CursorAdapter。

 

要继承CursorAdapter类。必须实现(Override)的方法有：

 

一  先实现 public Cursor runQueryOnBackgroundThread(CharSequence constraint)

 

其中constraint就是输入的要查询的关键字，注意当选中输入框的时候，此方法就会被调用，此时constraint = null 如处理不当运行时会报错

 

这里的返回值Cursor.并将提供给方法public View  newView（ ， ，）使用；

 

二  然后实现方法public View newView(Context context, Cursor cursor, ViewGroup parent)，cursor是上一个方法产生的.这个方法里面需要构造一个在dropdown里显示的view（我把这个view理解为例表中每行显示内容的一个模型，这里可以通过LayoutInflater构造出需要的样式）。这个view作为返回值在bindView( )中还会用到。

 

三  再是实现方法public void bindView(View view, Context context, Cursor cursor) 。view就是第二步产生的。cursor是第一步产生的。这里就是把corsor里的数据绑定到view中对应的元素中去。注意此方法会多次频繁调用，所以不要有耗时的操作，不然会卡。

 

四   最后是 public CharSequence convertToString(Cursor cursor) 此方法是在我们选择某个联系人后会显示在AutoCompleteTextView中的内容。

 

AutoCompleteTextView在布局文件中

 

android:completionThreshold="1"  表示输入1个字符就显示出建议的联系人

 

android:completionHint="@string/strHint"  表示在建议例表最后显示的一句话，比如“输入*号给出全部联系人“

 

package my.chenpu.exsdk_05;

import android.app.Service;

import android.content.ContentResolver;

import android.content.Context;

import android.database.Cursor;

import android.provider.ContactsContract;

import android.util.Log;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.CursorAdapter;

import android.widget.ImageView;

import android.widget.TextView;

public class ContactsAdapter extends CursorAdapter {

private ContentResolver mContent;

 

public ContactsAdapter(Context context, Cursor c) {

super(context, c);

// TODO Auto-generated constructor stub

mContent = context.getContentResolver();

}

@Override

public View newView(Context context, Cursor cursor, ViewGroup parent) {

// TODO Auto-generated method stub

Log.e("ContactsAdapter", "newView!!!");

//      LayoutInflater inflater = LayoutInflater.from(context);

 

// LayoutInflater inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);

// TextView view  = (TextView) inflater.inflate(android.R.layout.simple_dropdown_item_1line, parent, false);

// view.setText(cursor.getString(cursor.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME)));

 

LayoutInflater inflater = (LayoutInflater) context.getSystemService(Service.LAYOUT_INFLATER_SERVICE);

View view = (View) inflater.inflate(R.layout.ex05_09_cursoradapterview, null);

TextView text = (TextView) view.findViewById(R.id.textinline);

ImageView image = (ImageView) view.findViewById(R.id.viewinline);

text.setText(cursor.getString(cursor.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME)));

image.setImageResource(R.drawable.min);

return view;

}

@Override

public void bindView(View view, Context context, Cursor cursor) {

// TODO Auto-generated method stub

Log.e("ContactsAdapter", "bindView!!!");

// ((TextView) view).setText(

// cursor.getString(cursor.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME)));

TextView text = (TextView) view.findViewById(R.id.textinline);

text.setText(cursor.getString(cursor.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME)));

}

@Override

public Cursor runQueryOnBackgroundThread(CharSequence constraint) {

// TODO Auto-generated method stub

Log.e("ContactsAdapter", "runQueryOnBackgroundThread()!!!");

super.runQueryOnBackgroundThread(constraint);

if(getFilterQueryProvider() != null)

{

Log.e("ContactsAdapter", "getFilterQueryProvider()!!!");

return getFilterQueryProvider().runQuery(constraint);

}

StringBuilder buffer = null;

String[] args = null;

Log.e("ContactsAdapter", "|" + constraint.toString() + "|");

if(constraint != null)

{

buffer = new StringBuilder();

buffer.append("UPPER(");

buffer.append(ContactsContract.Contacts.DISPLAY_NAME);

buffer.append(") GLOB ?");

 

args = new String[]{

constraint.toString().toUpperCase() + "*" //匹配以constraint开头的所有联系人名

};

}

 

return mContent.query(ContactsContract.Contacts.CONTENT_URI,

null, buffer == null? null : buffer.toString(),

args, null);

}

//当选则某项后输入的位置显示的东西。

@Override

public CharSequence convertToString(Cursor cursor) {

// TODO Auto-generated method stub

return cursor.getString(cursor.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME));

}

 

}

以上就是对CursorAdapter的实现。其中的newView（）方法很是让我郁闷了很久, 网上找了很久才大概了解了LayoutInflater的主要目地就是把一个布局文件导入到代码中来，下面//线的几行是不同的使用方法。

 

我的方法是自己写了个ex05_09_cursoradapterview.xml  ，里面就是很简单的左边一个TextView显示联系人名，右边一个ImageView用于显示一个小图标。关于这部分网上很多查查就有了。

 

@Override

public View newView(Context context, Cursor cursor, ViewGroup parent) {

// TODO Auto-generated method stub

Log.e("ContactsAdapter", "newView!!!");

//  LayoutInflater inflater = LayoutInflater.from(context);

 

// LayoutInflater inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);

// TextView view  = (TextView) inflater.inflate(android.R.layout.simple_dropdown_item_1line, parent, false);

// view.setText(cursor.getString(cursor.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME)));

 

LayoutInflater inflater = (LayoutInflater) context.getSystemService(Service.LAYOUT_INFLATER_SERVICE);

View view = (View) inflater.inflate(R.layout.ex05_09_cursoradapterview, null);

TextView text = (TextView) view.findViewById(R.id.textinline);

ImageView image = (ImageView) view.findViewById(R.id.viewinline);

text.setText(cursor.getString(cursor.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME)));

image.setImageResource(R.drawable.min);

return view;

}

 

 

 

android.R.layout.simple_dropdown_item_1line

 

 

 

位置：mydroid/frameworks/base/core/res/res/layout/simple_dropdown_item_1line.xml

 

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

<!--

/* //device/apps/common/assets/res/any/layout/simple_spinner_item.xml

**

** Copyright 2008, The Android Open Source Project

**

** Licensed under the Apache License, Version 2.0 (the "License");

** you may not use this file except in compliance with the License.

** You may obtain a copy of the License at

**

**     http://www.apache.org/licenses/LICENSE-2.0

**

** Unless required by applicable law or agreed to in writing, software

** distributed under the License is distributed on an "AS IS" BASIS,

** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

** See the License for the specific language governing permissions and

** limitations under the License.

*/

-->

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

android:id="@android:id/text1"

style="?android:attr/dropDownItemStyle" mce_style="?android:attr/dropDownItemStyle"

android:textAppearance="?android:attr/textAppearanceLargeInverse"

android:singleLine="true"

android:layout_width="match_parent"

android:layout_height="?android:attr/listPreferredItemHeight"

android:ellipsize="marquee" />

 

 

 

最后还有程序中使用ContactsContract，我看的书写的是Contacts，似乎是2.0后这个就不建议使用了。这里还有个查找联系人后如何找到属于此人的全部电话号码的问题。

 

 

 

这里提供一个链接 http://hi.baidu.com/wudaovip/blog/item/d7f166df13a8241c495403e7.html

 

package my.chenpu.exsdk_05;

import android.app.Activity;

import android.content.ContentResolver;

import android.database.Cursor;

import android.os.Bundle;

import android.provider.Contacts.People;

import android.provider.ContactsContract;

import android.util.Log;

import android.view.View;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.AutoCompleteTextView;

import android.widget.TextView;

public class ex05_09 extends Activity {

private AutoCompleteTextView myAutoCompleteTextView;

private TextView myTextView;

private Cursor contactCursor;

private ContactsAdapter myContactsAdapter;

//无用了

public static final String[] PEOPLE_PROJECTION = new String[]{

ContactsContract.Contacts._ID, ContactsContract.Contacts.PHOTO_ID,

ContactsContract.Contacts.CONTENT_TYPE, ContactsContract.Contacts.CONTACT_STATUS_LABEL,

ContactsContract.Contacts.DISPLAY_NAME

};

 

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.ex05_09);

Log.e("ex05_09", "onCreate!!!");

myAutoCompleteTextView = (AutoCompleteTextView) findViewById(R.id.myAutoCompleteTextView);

myTextView = (TextView) findViewById(R.id.myTextView0902);

ContentResolver content = getContentResolver();

contactCursor = content.query(ContactsContract.Contacts.CONTENT_URI,

null, null, null, null);

myContactsAdapter = new ContactsAdapter(this, contactCursor);

 

myAutoCompleteTextView.setAdapter(myContactsAdapter);

myAutoCompleteTextView.setOnItemClickListener(new OnItemClickListener(){

@Override

public void onItemClick(AdapterView<?> parent, View view,

int position, long id) {

// TODO Auto-generated method stub

String _id;

Cursor phcursor;

Cursor c = myContactsAdapter.getCursor();

c.moveToPosition(position);

String number = "";

if(c.getInt(c.getColumnIndexOrThrow(ContactsContract.Contacts.HAS_PHONE_NUMBER)) != 0)

{

_id = c.getString(c.getColumnIndexOrThrow(ContactsContract.Contacts._ID));

phcursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,

null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "=" + _id, null, null);

while(phcursor.moveToNext())

{

number += phcursor.getString(phcursor.getColumnIndexOrThrow(ContactsContract.CommonDataKinds.Phone.NUMBER));

number += " , ";

}

}

else

number = "无输入电话！";

myTextView.setText(c.getString(c.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME)) +

"的电话是：" + number);

}

 

});

}
}

Cursor c = DBHelper.query();
for(c.moveToFirst(); ! c.isAfterLast(); c.moveToNext()){
    int id = c.getInt(0);
    String ty = c.getString(1);
    showDialog(“共有”+data_total+“条,id=”+id+“,类型=”+ty);
}