android主線程訪問網絡失敗的解決方法

在Activity的onCreate方法中添加以下代碼：

if(android.os.Build.VERSION.SDK_INT >= 11) {
			StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
			.detectDiskReads()
			.detectDiskWrites()
			.detectNetwork() 
			.penaltyLog()
			.build());

			StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
			.detectLeakedSqlLiteObjects()
			.penaltyLog()
			.penaltyDeath()
			.build());
		}