Android_Utils/WindowUtils.java at master · RealMoMo/Android_Utils · GitHub

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packagecom.realmo.utils;

importandroid.animation.ValueAnimator;
importandroid.app.Activity;
importandroid.content.Context;
importandroid.content.res.Configuration;
importandroid.view.Surface;
importandroid.view.Window;
importandroid.view.WindowManager;

publicfinalclassWindowUtils {

/**
 * Don't let anyone instantiate this class.
 */
privateWindowUtils() {
thrownewError("Do not need instantiate!");
 }

/**
 * 获取当前窗口的旋转角度
 *
 * @param activity activity
 * @return int
 */
publicstaticintgetDisplayRotation(Activityactivity) {
switch (activity.getWindowManager().getDefaultDisplay().getRotation()) {
caseSurface.ROTATION_0:
return0;
caseSurface.ROTATION_90:
return90;
caseSurface.ROTATION_180:
return180;
caseSurface.ROTATION_270:
return270;
default:
return0;
 }
 }

/**
 * 当前是否是横屏
 *
 * @param context context
 * @return boolean
 */
publicstaticfinalbooleanisLandscape(Contextcontext) {
returncontext.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE;
 }

/**
 * 当前是否是竖屏
 *
 * @param context context
 * @return boolean
 */
publicstaticfinalbooleanisPortrait(Contextcontext) {
returncontext.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT;
 }
/**
 * 调整窗口的透明度 1.0f,0.5f 变暗
 * @param from from>=0&&from<=1.0f
 * @param to to>=0&&to<=1.0f
 * @param context 当前的activity
 */
publicstaticvoiddimBackground(finalfloatfrom, finalfloatto, Activitycontext) {
finalWindowwindow = context.getWindow();
ValueAnimatorvalueAnimator = ValueAnimator.ofFloat(from, to);
valueAnimator.setDuration(500);
valueAnimator.addUpdateListener(
newValueAnimator.AnimatorUpdateListener() {
@Override
publicvoidonAnimationUpdate(ValueAnimatoranimation) {
WindowManager.LayoutParamsparams
 = window.getAttributes();
params.alpha = (Float) animation.getAnimatedValue();
window.setAttributes(params);
 }
 });
valueAnimator.start();
 }
}