从零开始，学习android开发

简单的说，一个Android的应用，比如一个Activity,主要包含4个文件，即3个xml，一个Java，三个xml分别是main.xml（主界面文件），strings.xml(值文件）和一个AndroidManifest.xml（功能清单文件）。一个Java文件就是我们的主程序文件。
现在要编写的第一个android项目，是获取手机信息的一个Activity。
下面是4个文件的内容：
main.xml
<?xml version="1.0" encoding="utf-8"?>
<linearLayout  xmlns:android="http://schemas.android.com/ask/res/android"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:orientation="vertical">
<TextView
     android:id="@+id/text01"
     android:layout_width="fill_parent"
     andriod:layout_height="fill_parent"/>
</linearLayout>

stinrs.xml的内容
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World, Code01_01!</string>
    <string name="app_name">Code01_01</string>
</resources>

AndroidManifest.xml的内容
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.Code01_01"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".Code01_01"
                  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>
最后一个是Java主程序文件，是以你的Project的名字命名的Java程序文件。

package com.Code01_01（注，项目名必须是Code01_01）
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.telephony.telephonyManager;
import android.widget.TextView;
pubilc class Code01_01 extends Activity{
     TextView textview01=null;

public void onCreate(Bundle saveInstanceState){
       super.onCreate(saveInstanceState);
       setContentView(R.Layout.main);
       textview01=(TextView)this.findViewById(R.id.text01);
       fetch_status();

       Syste.out.pringln("----------------onCreate");
      }
public void getPhoneNumber(){
       TelephonyManager tm=(TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
       String imei=tm.getDeviceId();
       String tel=tm.getLine1Number();
       textview01.setText("手机串号"+imei+"\n"+"手机号"+tel+"\n");
       }
public void fetch_status(){
       TelephonyManager tm=(TelephonyManager) this
.getSystemService(Context.TELEPHONY_SERVICE);
      String str="";
      str+="移动设备身份码DeviceId(IMEI)="+tm.getDeviceID()+"\n";
      str += "设备软件版本DeviceSoftwareVersion = " + tm.getDeviceSoftwareVersion()+ "\n";
str += "手机号Line1Number = " + tm.getLine1Number() + "\n";
str += "国际长途区号NetworkCountryIso = " + tm.getNetworkCountryIso() + "\n";
str += "网络运营商NetworkOperator = " + tm.getNetworkOperator() + "\n";
str += "运营商名称NetworkOperatorName = " + tm.getNetworkOperatorName() + "\n";
str += "网络连接类型NetworkType = " + tm.getNetworkType() + "\n";
str += "手机类型PhoneType = " + tm.getPhoneType() + "\n";
str += "获取ISO国家码SimCountryIso = " + tm.getSimCountryIso() + "\n";
str += "运营商网络码SimOperator = " + tm.getSimOperator() + "\n";
str += "运营商名称SimOperatorName = " + tm.getSimOperatorName() + "\n";
str += "SIM卡的序列号SimSerialNumber = " + tm.getSimSerialNumber() + "\n";
str += "SIM卡状态SimState = " + tm.getSimState() + "\n";
str += "唯一的用户IDSubscriberId(IMSI) = " + tm.getSubscriberId() + "\n";
str += "获取语音邮件号码VoiceMailNumber = " + tm.getVoiceMailNumber() + "\n";
textView01.setText(str);
}

}