首屏動(dòng)畫及驗(yàn)證網(wǎng)絡(luò)狀態(tài)跳轉(zhuǎn)

public class tween extends Activity {   
    // 聲明ImageView對(duì)象   
    ImageView p_w_picpathView;   
    // 聲明TextView   
    TextView textView;   
    // ImageView的alpha值   
    int p_w_picpath_alpha = 0;   
    // Handler對(duì)象用來(lái)給UI_Thread的MessageQueue發(fā)送消息   
    Handler mHandler;   
    // 線程是否運(yùn)行判斷變量   
    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;   
        // 獲得ImageView的對(duì)象   
        p_w_picpathView = (ImageView) this.findViewById(R.id.img);   
        textView = (TextView) this.findViewById(R.id.tvgc);   
       // 設(shè)置p_w_picpathView的Alpha值   
        p_w_picpathView.setAlpha(p_w_picpath_alpha);   
        textView.setAlpha(p_w_picpath_alpha);   
        // 開(kāi)啟一個(gè)線程來(lái)讓Alpha值遞減   
        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視圖   
        mHandler = new Handler() {   
            @Override   
            public void handleMessage(Message msg) {   
                super.handleMessage(msg);   
                p_w_picpathView.setAlpha(p_w_picpath_alpha);   
                // 設(shè)置textview顯示當(dāng)前的Alpha值   
                textView.setAlpha(p_w_picpath_alpha);  
                // 刷新視圖   
                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;  }   
        // 發(fā)送需要更新p_w_picpathview視圖的消息-->這里是發(fā)給主線程   
        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：當(dāng)前處于運(yùn)營(yíng)商網(wǎng)絡(luò)", Toast.LENGTH_SHORT).show(); } 
              Intent it = new Intent(); 
              it.setClass(tween.this,tabhost.class); 
              startActivity(it); 
            
           } 
           else{ 
               Toast.makeText(tween.this, "當(dāng)前網(wǎng)絡(luò)連接不可用！", Toast.LENGTH_SHORT).show();        
            }} 
          }   
}