Loading waiting 实现方式

来源：互联网发布：重庆大学博雅学院知乎编辑：程序博客网时间：2024/05/30 05:40

waiting_layout.xml 布局的代码:

<?xml version="1.0" encoding="UTF-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="horizontal" android:layout_width="280dip"android:layout_gravity="center" android:gravity="center"android:layout_height="120dip" android:background="@drawable/alpha_black_back"><ProgressBar android:layout_width="wrap_content"style="?android:attr/progressBarStyleLarge" android:layout_height="wrap_content"android:layout_margin="5dip" /><TextView android:id="@+id/identify_label" android:textColor="#fff"android:paddingLeft="3dip" android:paddingRight="5dip"android:layout_width="wrap_content" android:textSize="22sp"android:layout_height="fill_parent" android:gravity="center"android:text="@string/common_message_pleaseWait" /></LinearLayout>

在Activity上层新建一个Window,用于承载loading. 这样做的好处，避免在Activity上加一个ProgressView. 具体代码如下:

 protected final void showWaiting(boolean isBlur) {isWaiting = true;try {WindowManager.LayoutParams lp = null;if (isBlur) {lp = new WindowManager.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT,WindowManager.LayoutParams.TYPE_APPLICATION,WindowManager.LayoutParams.FLAG_FULLSCREEN| WindowManager.LayoutParams.FLAG_BLUR_BEHIND| WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON,PixelFormat.TRANSLUCENT);} else {lp = new WindowManager.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT,WindowManager.LayoutParams.TYPE_APPLICATION,WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE| WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON,PixelFormat.TRANSLUCENT);}WindowManager mWindowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);if (waitView == null) {LayoutInflater inflate = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);waitView = inflate.inflate(R.layout.waiting_layout, null);}mWindowManager.addView(waitView, lp);} catch (Throwable e) {isWaiting = false;Log.e(TAG, "[showWaiting]");}} protected final void hideWaiting() {isWaiting = false;try {if (waitView != null) {WindowManager mWindowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);mWindowManager.removeView(waitView);waitView = null;}} catch (Throwable e) {Log.e(TAG, "[showWaiting]", e);}}

http://blog.csdn.net/wukunting/article/details/6332767