得到Android设备的唯一id

权限

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

-----------------------------------------------------

主Activity类

package com.sl.getdeviceid;

import android.app.Activity;
import android.os.Bundle;

public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) 
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

ApplicationContext.initialize(this);
Device.getDeviceId(this);
}
}

-----------------------------------------------------

保存应用程序上下文

package com.sl.getdeviceid;

import android.content.Context;

public class ApplicationContext
{
private static Context contextSingleton;

public static void initialize(Context context)
{
contextSingleton = context;
}

public static Context getContext()
{
return contextSingleton;
}

}

-----------------------------------------------------

Device类

package com.sl.getdeviceid;


import java.io.File;
import java.io.IOException;


import android.content.Context;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.telephony.TelephonyManager;
import android.text.TextUtils;
import android.util.Log;


public class Device 
{
public static String getDeviceId(Context context)
{
String deviceId = getDeviceIdFromFile();
if(TextUtils.isEmpty(deviceId))
{
deviceId = getDeviceIdFromDeviceInfo(context);
setDeviceIdToFile(context, deviceId);
}

return deviceId;
}

public static String getDeviceIdFromFile()
{
String deviceId = "";

try 
{
File memoryFile = new File(FileUtil.DIR.CACHE_PATH_MEMORY_DIR_DEVICEID);
File sdcardFile = new File(FileUtil.DIR.CACHE_PATH_SDCARD_DIR_DEVICEID);

if(memoryFile.exists())
{
return deviceId = FileUtil.read(FileUtil.DIR.CACHE_PATH_MEMORY_DIR_DEVICEID);
}

if(sdcardFile.exists())
{
return deviceId = FileUtil.read(FileUtil.DIR.CACHE_PATH_SDCARD_DIR_DEVICEID);
}
} 
catch (Exception e) 
{
Log.e("Device", "getDeviceIdFromFile: " + e.toString());
}

return deviceId;
}


public static String getDeviceIdFromDeviceInfo(Context context) 
{
StringBuilder deviceId = new StringBuilder();


try 
{
WifiManager wifi = (WifiManager) context.getSystemService("wifi");
WifiInfo info = wifi.getConnectionInfo();
String wifiMac = info.getMacAddress();


if (!TextUtils.isEmpty(wifiMac)) 
{
Log.e("Device", "wifiMac: " + wifiMac);
deviceId.append(wifiMac).append('\002');
}


TelephonyManager tm = (TelephonyManager) context.getSystemService("phone");
String imei = tm.getDeviceId();
if (!TextUtils.isEmpty(imei))
{
Log.e("Device", "imei: " + imei);
deviceId.append(imei).append('\002');
}


String sn = tm.getSimSerialNumber();
if (!TextUtils.isEmpty(sn)) 
{
Log.e("Device", "sn: " + sn);
deviceId.append(sn);
}


} 
catch (Exception e)
{
Log.e("Device", e.toString());
}

Log.e("Device", "deviceId.toString(): " + deviceId.toString());

return deviceId.toString();
}

public static void setDeviceIdToFile(Context context, String deviceId)
{
if (!FileUtil.isExistDir(FileUtil.DIR.CACHE_PATH_MEMORY_DIR)) 
{
   FileUtil.createMemoryDir(FileUtil.DIR.CACHE_PATH_MEMORY_DIR);
}
   
if (!FileUtil.isExistDir(FileUtil.DIR.CACHE_PATH_SDCARD_DIR)) 
{
   FileUtil.createSDCardDir(FileUtil.DIR.CACHE_PATH_SDCARD_DIR);
}
  
File memoryFile = new File(FileUtil.DIR.CACHE_PATH_MEMORY_DIR_DEVICEID);
File sdcardFile = new File(FileUtil.DIR.CACHE_PATH_SDCARD_DIR_DEVICEID);
  
if (!memoryFile.exists())
{
   try 
   {
    memoryFile.createNewFile();
   } 
   catch (IOException e) 
   {
    Log.e("Device", e.toString());
   }
   
   FileUtil.writeSingleLine(memoryFile, deviceId);
}

    if (!sdcardFile.exists()) 
    {
    try 
    {
    sdcardFile.createNewFile();
    } 
    catch (IOException e) 
    {
    Log.e("Device", e.toString());
    }
   
    FileUtil.writeSingleLine(sdcardFile, deviceId);
    }
}

}

-----------------------------------------------------

文件类

package com.sl.getdeviceid;


import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;


import org.apache.http.util.EncodingUtils;


import android.content.Context;
import android.os.Environment;
import android.util.Log;


public class FileUtil 
{
public static boolean isAvailable()
{
   return Environment.getExternalStorageState().equals("mounted");
}

public static String getSDcardPath()
{
   return Environment.getExternalStorageDirectory().getAbsolutePath();
}

public static String getMemoryFilesPath(Context context)
{
   if (context == null) 
   {
     Log.e("FileUtil", "context is null");
     return "";
   }
   
   return context.getFilesDir().getAbsolutePath();
}
 
public static class DIR
{
public static String MEMORY_DIR = getMemoryFilesPath(ApplicationContext.getContext());
   public static String SDCARD_DIR = getSDcardPath();
   public static String CACHE_PATH_MEMORY_DIR = MEMORY_DIR + File.separator + "KODCACHE";
   public static String CACHE_PATH_SDCARD_DIR = SDCARD_DIR + File.separator + "KODCACHE";
public static String CACHE_PATH_MEMORY_DIR_DEVICEID = MEMORY_DIR + File.separator + "KODCACHE" + File.separator + "DEVICEID.log";
public static String CACHE_PATH_SDCARD_DIR_DEVICEID = SDCARD_DIR + File.separator + "KODCACHE" + File.separator + "DEVICEID.log";
}

public static String read(String fileName)
{
String res = "";
   File file = new File(fileName);
   
   try
   {
     FileInputStream fis = new FileInputStream(file);
     int length = fis.available();
     byte[] buffer = new byte[length];
     fis.read(buffer);
     res = EncodingUtils.getString(buffer, "UTF-8");
     fis.close();
   } 
   catch (IOException e)
   {
    Log.e("FileUtil", e.toString());
   }
   return res;
}

public static boolean isExistDir(String path)
{
   File dir = new File(path);


   return (dir.exists()) && (dir.isDirectory());
}

public static boolean createMemoryDir(String memoryPath)
{
   File file = new File(memoryPath);
   boolean mkOk = false;
   
   if (!file.isDirectory()) 
   {
     mkOk = file.mkdirs();
     
     if (!mkOk) 
     {
       mkOk = file.mkdirs();
     }
   }
   
   return mkOk;
}

public static boolean createSDCardDir(String SDCardPath)
{
   boolean mkOk = false;
   
   if (isAvailable())
   {
     File file = new File(SDCardPath);
     
     if (!file.isDirectory())
     {
       mkOk = file.mkdirs();
       
       if (!mkOk) 
       {
         mkOk = file.mkdirs();
       }
     }
   }
   
   return mkOk;
}

public static void writeSingleLine(File file, String content)
{
   FileWriter fw = null;
   
   try 
   {
     fw = new FileWriter(file, true);
     fw.write(content);
   } 
   catch (IOException e) 
   {
    Log.e("FileUtil", e.toString());
   } 
   finally 
   {
   if (fw != null)
   {
    try 
   {
       fw.close();
   }
   catch (IOException e) 
   {
      Log.e("FileUtil", e.toString());
   }
   }
   }
}


}

总结

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