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【Java】屏幕相关
作者:亦菲 / 发布于2017/2/21/ 661
package com.blankj.utilcode.utils;

import android.app.Activity;
import android.app.KeyguardManager;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.provider.Settings;
import android.util.DisplayMetrics;
import android.view.Surface;
import android.view.View;
import android.view.WindowManager;

/**
 * <pre>
 *     author: Blankj
 *     blog  : http://blankj.com
 *     time  : 2016/8/2
 *     desc  : 屏幕相关工具类
 * </pre>
 */
public class ScreenUtils {

    private ScreenUtils() {
        throw new UnsupportedOperationException("u can't instantiate me...");
    }

    /**
     * 获取屏幕的宽度（单位：px）
     *
     * @return 屏幕宽px
     */
    public static int getScreenWidth() {
        WindowManager windowManager = (WindowManager) Utils.getContext().getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics dm = new DisplayMetrics();// 创建了一张白纸
        windowManager.getDefaultDisplay().getMetrics(dm);// 给白纸设置宽高
        return dm.widthPixels;
    }

    /**
     * 获取屏幕的高度（单位：px）
     *
     * @return 屏幕高px
     */
    public static int getScreenHeight() {
        WindowManager windowManager = (WindowManager) Utils.getContext().getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics dm = new DisplayMetrics();// 创建了一张白纸
        windowManager.getDefaultDisplay().getMetrics(dm);// 给白纸设置宽高
        return dm.heightPixels;
    }

    /**
     * 设置屏幕为横屏
     * 还有一种就是在Activity中加属性android:screenOrientation="landscape"
     * 不设置Activity的android:configChanges时，切屏会重新调用各个生命周期，切横屏时会执行一次，切竖屏时会执行两次
     * 设置Activity的android:configChanges="orientation"时，切屏还是会重新调用各个生命周期，切横、竖屏时只会执行一次
     * 设置Activity的android:configChanges="orientation|keyboardHidden|screenSize"（4.0以上必须带最后一个参数）时
     * 切屏不会重新调用各个生命周期，只会执行onConfigurationChanged方法
     *
     * @param activity activity
     */
    public static void setLandscape(Activity activity) {
        activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
    }

    /**
     * 设置屏幕为竖屏
     *
     * @param activity activity
     */
    public static void setPortrait(Activity activity) {
        activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    }

    /**
     * 判断是否横屏
     *
     * @return {@code true}: 是{@code false}: 否
     */
    public static boolean isLandscape() {
        return Utils.getContext().getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE;
    }

    /**
     * 判断是否竖屏
     *
     * @return {@code true}: 是{@code false}: 否
     */
    public static boolean isPortrait() {
        return Utils.getContext().getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT;
    }

    /**
     * 获取屏幕旋转角度
     *
     * @param activity activity
     * @return 屏幕旋转角度
     */
    public static int getScreenRotation(Activity activity) {
        switch (activity.getWindowManager().getDefaultDisplay().getRotation()) {
            default:
            case Surface.ROTATION_0:
                return 0;
            case Surface.ROTATION_90:
                return 90;
            case Surface.ROTATION_180:
                return 180;
            case Surface.ROTATION_270:
                return 270;
        }
    }

    /**
     * 获取当前屏幕截图，包含状态栏
     *
     * @param activity activity
     * @return Bitmap
     */
    public static Bitmap captureWithStatusBar(Activity activity) {
        View view = activity.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        Bitmap bmp = view.getDrawingCache();
        DisplayMetrics dm = new DisplayMetrics();
        activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
        Bitmap ret = Bitmap.createBitmap(bmp, 0, 0, dm.widthPixels, dm.heightPixels);
        view.destroyDrawingCache();
        return ret;
    }

    /**
     * 获取当前屏幕截图，不包含状态栏
     *
     * @param activity activity
     * @return Bitmap
     */
    public static Bitmap captureWithoutStatusBar(Activity activity) {
        View view = activity.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        Bitmap bmp = view.getDrawingCache();
        int statusBarHeight = BarUtils.getStatusBarHeight(activity);
        DisplayMetrics dm = new DisplayMetrics();
        activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
        Bitmap ret = Bitmap.createBitmap(bmp, 0, statusBarHeight, dm.widthPixels, dm.heightPixels - statusBarHeight);
        view.destroyDrawingCache();
        return ret;
    }

    /**
     * 判断是否锁屏
     *
     * @return {@code true}: 是{@code false}: 否
     */
    public static boolean isScreenLock() {
        KeyguardManager km = (KeyguardManager) Utils.getContext().getSystemService(Context.KEYGUARD_SERVICE);
        return km.inKeyguardRestrictedInputMode();
    }

    /**
     * 设置进入休眠时长
     * 需添加权限 {@code <uses-permission android:name="android.permission.WRITE_SETTINGS" />}
     *
     * @param duration 时长
     */
    public static void setSleepDuration(int duration) {
        Settings.System.putInt(Utils.getContext().getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT, duration);
    }

    /**
     * 获取进入休眠时长
     *
     * @return 进入休眠时长，报错返回-123
     */
    public static int getSleepDuration() {
        try {
            return Settings.System.getInt(Utils.getContext().getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT);
        } catch (Settings.SettingNotFoundException e) {
            e.printStackTrace();
            return -123;
        }
    }
}
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