获取系统的联系人信息

一 UI Code

<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"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        android:onClick="click"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_marginRight="21dp"
        android:layout_marginTop="60dp"
        android:layout_toLeftOf="@+id/textView1"
        android:text="插入短信" />

</RelativeLayout>

二 Permission Code

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
    <!--实现读与写短信的权限  -->
    <uses-permission android:name="android.permission.WRITE_SMS"/>
    <uses-permission android:name="android.permission.READ_SMS"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.itheima.insertsms.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>

三 Logical Code

package com.itheima.readsms;
import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
    private TextView tv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv = (TextView) findViewById(R.id.tv_content);
    }
    //读取系统里面的短信
    public void click(View view){
        //1.利用内容提供者  中间人 获取用户的短信数据.
        ContentResolver resolver  = getContentResolver();
        Uri uri = Uri.parse("content://sms/"); //根据分析 代表的是所有的短信的路径
        Cursor cursor = resolver.query(uri, new String[]{"address","date","body","type"}, null, null, null);
        StringBuffer sb = new StringBuffer();
        while(cursor.moveToNext()){
            String address =cursor.getString(0);
            String date  = cursor.getString(1);
            String body = cursor.getString(2);
            String type = cursor.getString(3);
            //弹出一个对话框--提示短信发送成功
            Toast.makeText(MainActivity.this, "读取1短信成功", Toast.LENGTH_LONG).show();
            System.out.println("address="+address+"-date-"+date+"--body-"+body+"--type-"+type);
            sb.append(address+"--"+date+"---"+body+"---"+type);
            sb.append("\n");
            System.out.println("Hello");
        }
        cursor.close();
        //弹出一个对话框--提示短信发送成功
        Toast.makeText(MainActivity.this, "读取2短信成功", Toast.LENGTH_LONG).show();
        tv.setText(sb.toString());
    }
}