Android——PopupWindow

实现PopupWindow透明效果，先在drawable定义一个文件：

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
	android:shape="rectangle">
	<gradient android:startColor="#c0000000" android:endColor="#c0000000"
		android:angle="90" />
	<!-- <stroke android:dashWidth="2dp" android:dashGap="2dp"
		android:width="2dp" android:color="#FF00ff00" /> 描边 -->
	<corners android:bottomRightRadius="5dp"
		android:bottomLeftRadius="5dp" android:topLeftRadius="5dp"
		android:topRightRadius="5dp" /><!--设置圆角-->
</shape>

 代码中：

/**
	 * 初始化弹出等待窗口
	 */
	private void initPopWindow() {
		if (mPopupWindows == null) {
			View view = context.getLayoutInflater().inflate(
					R.layout.dialog_pop, null);
			mPopupWindows = new PopupWindow(view, 120, 100);
			((TextView) view.findViewById(R.id.message)).setText(mLoadingMsg);
			// mPopupWindows.setBackgroundDrawable(new BitmapDrawable());
		}
		if (mPopupWindows.isShowing()) {
			mPopupWindows.dismiss();
		}
	}

 最后：

mPopupWindows.showAtLocation(context.findViewById(currentId),
				Gravity.CENTER, 0, 0);

 具体参数查看源码