最简Dialog的实现
系统提供的各种Dialog太复杂！来个最简单的，看图：
简单吧！
实现：
private Dialog dialog; private void showProgress() {if(dialog == null) {dialog = new Dialog(this,R.style.Theme_TransparentDialog);//dialog.setContentView(R.layout.progress_dialog);dialog.setContentView(new ProgressBar(this));dialog.setCancelable(true);dialog.show();}}private void closeProgress() {if(dialog != null) {dialog.cancel();dialog = null;}}<style name="Theme_TransparentDialog"> <item name="android:windowBackground">@android:color/transparent</item> <item name="android:windowFrame">@null</item> <item name="android:windowContentOverlay">@null</item> <item name="android:windowIsFloating">true</item> <item name="android:windowIsTranslucent">true</item> <item name="android:windowNoTitle">true</item> <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item> <item name="android:backgroundDimEnabled">false</item></style>