android不能在子线程中更新ui，否则会出现android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.异常。
如果要在子线程中更新Ui，可以使用handler和Activity.runOnUiThread(Runnable)来实现
android不能在子线程中更新ui，否则会出现android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.异常。
如果要在子线程中更新Ui，可以使用handler和Activity.runOnUiThread(Runnable)来实现