package com.realmo.utils;

import android.animation.ValueAnimator;

import android.app.Activity;

import android.content.Context;

import android.content.res.Configuration;

import android.view.Surface;

import android.view.Window;

import android.view.WindowManager;

public final class WindowUtils {

/**

* Don't let anyone instantiate this class.

*/

private WindowUtils() {

throw new Error("Do not need instantiate!");

}

/**

* 获取当前窗口的旋转角度

*

* @param activity activity

* @return int

*/

public static int getDisplayRotation(Activity activity) {

switch (activity.getWindowManager().getDefaultDisplay().getRotation()) {

case Surface.ROTATION_0:

return 0;

case Surface.ROTATION_90:

return 90;

case Surface.ROTATION_180:

return 180;

case Surface.ROTATION_270:

return 270;

default:

return 0;

}

}

/**

* 当前是否是横屏

*

* @param context context

* @return boolean

*/

public static final boolean isLandscape(Context context) {

return context.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE;

}

/**

* 当前是否是竖屏

*

* @param context context

* @return boolean

*/

public static final boolean isPortrait(Context context) {

return context.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

*/

public static void dimBackground(final float from, final float to, Activity context) {

final Window window = context.getWindow();

ValueAnimator valueAnimator = ValueAnimator.ofFloat(from, to);

valueAnimator.setDuration(500);

valueAnimator.addUpdateListener(

new ValueAnimator.AnimatorUpdateListener() {

@Override

public void onAnimationUpdate(ValueAnimator animation) {

WindowManager.LayoutParams params

= window.getAttributes();

params.alpha = (Float) animation.getAnimatedValue();

window.setAttributes(params);

}

});

valueAnimator.start();

}

}