public class tween extends Activity {   
    // 声明ImageView对象   
    ImageView p_w_picpathView;   
    // 声明TextView   
    TextView textView;   
    // ImageView的alpha值   
    int p_w_picpath_alpha = 0;   
    // Handler对象用来给UI_Thread的MessageQueue发送消息   
    Handler mHandler;   
    // 线程是否运行判断变量   
    boolean isrung = false;   
   
    @Override   
    public void onCreate(Bundle savedInstanceState) {   
        super.onCreate(savedInstanceState);         
        requestWindowFeature(Window.FEATURE_NO_TITLE);   
        setContentView(R.layout.tween); 
        SysApplication.getInstance().addActivity(this);  
        final Context con=this.getApplicationContext(); 
        isrung = true;   
        // 获得ImageView的对象   
        p_w_picpathView = (ImageView) this.findViewById(R.id.img);   
        textView = (TextView) this.findViewById(R.id.tvgc);   
       // 设置p_w_picpathView的Alpha值   
        p_w_picpathView.setAlpha(p_w_picpath_alpha);   
        textView.setAlpha(p_w_picpath_alpha);   
        // 开启一个线程来让Alpha值递减   
        new Thread(new Runnable() {   
            @Override   
            public  void run() {   
                while (isrung) {   
                    try {   
                        Thread.sleep(200);   
                        // 更新Alpha值   
                        updateAlpha();   
                    } catch (InterruptedException e) {   
                        e.printStackTrace();   
                    }} }   
        }).start();   
        // 接受消息之后更新p_w_picpathview视图   
        mHandler = new Handler() {   
            @Override   
            public void handleMessage(Message msg) {   
                super.handleMessage(msg);   
                p_w_picpathView.setAlpha(p_w_picpath_alpha);   
                // 设置textview显示当前的Alpha值   
                textView.setAlpha(p_w_picpath_alpha);  
                // 刷新视图   
                p_w_picpathView.invalidate();  
              try{ 
                  if(p_w_picpath_alpha==255) 
                  { 
                isNetworkConnected(con); 
                } 
                  } 
              catch(Exception e){} 
               
            } };}   
    // 更新Alpha   
    public void updateAlpha() {   
        if (p_w_picpath_alpha +7<= 255) {   
            p_w_picpath_alpha += 7;   
        }  
        else { 
               p_w_picpath_alpha = 255; 
               isrung = false;  }   
        // 发送需要更新p_w_picpathview视图的消息-->这里是发给主线程   
        mHandler.sendMessage(mHandler.obtainMessage());   
         
}   
    public void isNetworkConnected(Context context)  {   
        if (context != null) {   
             ConnectivityManager mConnectivityManager = (ConnectivityManager)context   
                .getSystemService(Context.CONNECTIVITY_SERVICE);   
             NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();   
           if (mNetworkInfo != null) {   
               NetworkInfo mWiFiNetworkInfo = mConnectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI); 
               NetworkInfo mMobileNetworkInfo = mConnectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);  
              if(!mWiFiNetworkInfo.isConnected()){ 
               Toast.makeText(tween.this, "提示：当前处于运营商网络", Toast.LENGTH_SHORT).show(); } 
              Intent it = new Intent(); 
              it.setClass(tween.this,tabhost.class); 
              startActivity(it); 
            
           } 
           else{ 
               Toast.makeText(tween.this, "当前网络连接不可用！", Toast.LENGTH_SHORT).show();        
            }} 
          }   
}