Android简单通讯录的开发

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本次开发分为4步：

1、获取手机通讯录的信息；

2、手机通讯录的数据封装；

3、手机通讯录的信息的UI适配；

4、对ListView的优化。

GetNumber.java：

用来获取手机通讯录。下面是代码部分：

package com.example.getmyphonenumber;

import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.database.Cursor;
import android.provider.ContactsContract.CommonDataKinds.Phone;

public class GetNumber {

public static List<PhoneInfo> lists = new ArrayList<PhoneInfo>();

public static String getNumber(Context context){
Cursor cursor = context.getContentResolver().query(Phone.CONTENT_URI, null, null, null, null);
String phoneNumber;
String phoneName;
while (cursor.moveToNext()) {
phoneNumber = cursor.getString(cursor.getColumnIndex(Phone.NUMBER));
phoneName = cursor.getString(cursor.getColumnIndex(Phone.DISPLAY_NAME));
PhoneInfo phoneInfo = new PhoneInfo(phoneName, phoneNumber);
lists.add(phoneInfo);
System.out.println(phoneName+phoneNumber);
}
return null;
}

}

2、PhoneInfo.java：

用来对姓名和电话号码进行数据封装。下面是代码部分：

package com.example.getmyphonenumber;

public class PhoneInfo {
private String name;
private String number;

public PhoneInfo(String name,String number) {
setNumber(number);
setName(name);
}

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;
}

}

3、Myadapter.java：

用来对手机通讯录信息进行UI适配和ListView优化。下面是代码部分：

package com.example.getmyphonenumber;

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.LinearLayout;
import android.widget.TextView;

public class Myadapter extends BaseAdapter{

private List<PhoneInfo> lists;
private Context context;
private LinearLayout layout;

public Myadapter(List<PhoneInfo> lists,Context context) {
this.lists = lists;
this.context = context;

}

@Override
public int getCount() {
return lists.size();
}

@Override
public Object getItem(int position) {
return lists.get(position);
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
// LayoutInflater inflater = LayoutInflater.from(context);
// layout = (LinearLayout) inflater.inflate(R.layout.call, null);
// TextView nametv = (TextView) layout.findViewById(R.id.name);
// TextView numbertv = (TextView) layout.findViewById(R.id.number);
// nametv.setText(lists.get(position).getName());
// numbertv.setText(lists.get(position).getNumber());
ViewHolder holder;
if (convertView == null) {
convertView = LayoutInflater.from(context).inflate(R.layout.cell, null);
holder = new ViewHolder();
holder.nametv = (TextView) convertView.findViewById(R.id.name);
holder.numbertv = (TextView) convertView.findViewById(R.id.number);
holder.nametv.setText(lists.get(position).getName());
holder.numbertv.setText(lists.get(position).getNumber());
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
holder.nametv.setText(lists.get(position).getName());
holder.numbertv.setText(lists.get(position).getNumber());
}
return convertView;
}
private static class ViewHolder{
TextView nametv;
TextView numbertv;
}

}

界面部分代码：

activity_main.xml：

cell.xml：

<?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" >

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >

<ImageView
android:id="@+id/imageView1"
android:layout_width="45dp"
android:layout_height="45dp"
android:src="@drawable/ic_launcher" />

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center_vertical"
android:orientation="horizontal" >

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >

<TextView
android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="15sp"
android:text="TextView" />

<TextView
android:id="@+id/number"
android:textSize="10sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
</LinearLayout>
</LinearLayout>
</LinearLayout>

</LinearLayout>

主类部分：

MainActivity.java：

package com.example.getmyphonenumber;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ListView;

public class MainActivity extends Activity {

private ListView lv;
private Myadapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GetNumber.getNumber(this);
lv = (ListView) findViewById(R.id.lv);
adapter = new Myadapter(GetNumber.lists, this);
lv.setAdapter(adapter);
}
}

权限部分：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.getmyphonenumber"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.READ_CONTACTS"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

</manifest>

总结：只是一个简单的Android通讯录，基本功能实现了，后期还可以有很多改进，比如加入E-mail和家庭住址等信息。

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