android.os.NetworkOnMainThreadException问题

最近测试程序在手机端测试正常,在联网的时候总会抛出android.os.NetworkOnMainThreadException这个异常

也就是说不能在主线程中执行联网操作

在4.0中,访问网络不能在主程序中进行,有两个方法可以解决,一个是在主程序中增加:

StrictMode is a developer tool which detects things you might be doing by accident and brings them to your attention so you can fix them.

// 详见StrictMode文档

StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()

.detectDiskReads()

.detectDiskWrites()

.detectNetwork()   // or .detectAll() for all detectable problems

.penaltyLog()

.build());

StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()

.detectLeakedSqlLiteObjects()

.detectLeakedClosableObjects()

.penaltyLog()

.penaltyDeath()

.build());

 

 

另一种是启动线程执行下载任务:

       public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

setContentView(R.layout.main);

        // 启动线程执行下载任务

new Thread(downloadRun).start();

}

/**

* 下载线程

*/

Runnable downloadRun = new Runnable(){

@Override

public void run() {

// TODO Auto-generated method stub

updateListView();

}

};

posted @ 2013-03-27 16:17  Andye  阅读(934)  评论(0编辑  收藏  举报