/**
* 屏幕相关工具类
*/
public final class ScreenUtil {
/* 获取屏幕休眠时长的错误码 */
public final static int GET_SLEEPTIME_ERROR = -123;
private ScreenUtil() {
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* 获取屏幕的宽度和高度（单位：px）
* <p>android 从 3.2 版本开始获取屏幕区域高度会自动减去状态栏高度</p>
*
* @return Point
*/
public static Point getScreenSize() {
DisplayMetrics metrics = SUtils.getApp().getResources().getDisplayMetrics();
return new Point(metrics.widthPixels, metrics.heightPixels);
}
/**
* 获取屏幕的物理尺寸（单位：英寸）
*
* @return 物理尺寸
*/
public static float getScreenSizeOfDevice() {
DisplayMetrics metrics = SUtils.getApp().getResources().getDisplayMetrics();
float xdpi = metrics.xdpi;
float ydpi = metrics.ydpi;
int width = metrics.widthPixels;
int height = metrics.heightPixels;
float w = (width / xdpi) * (width / xdpi);
float h = (height / ydpi) * (width / xdpi);
return (float) Math.sqrt(w + h);
}
/**
* 获取屏幕高和宽的比
*
* @return 屏幕高和宽的比
*/
public static float getScreenRatio() {
Point P = getScreenSize();
float H = P.y;
float W = P.x;
return (H / W);
}
/**
* 获取屏幕密度（指每平方英寸中的像素数）
* <p>例如：0.75 / 1 / 1.5 / ...（dpi/160 可得）</p>
*
* @return 屏幕密度
*/
public static float getDensity() {
return SUtils.getApp().getResources().getDisplayMetrics().density;
}
/**
* 获取屏幕像素密度 dpi （指每英寸中的像素数）
* <p>例如：120 / 160 / 240 /...</p>
*
* @return 像素密度 dpi
*/
public static int getDensityDpi() {
return SUtils.getApp().getResources().getDisplayMetrics().densityDpi;
}
/**
* 获取状态栏的高度
*
* @return 状态栏的高度
*/
public static int getStatusBarHeight() {
int result = 0;
int resourceId = SUtils.getApp().getResources().getIdentifier("status_bar_height", "dimen", "android");
if (resourceId > 0) {
result = SUtils.getApp().getResources().getDimensionPixelSize(resourceId);
}
return result;
}
/**
* 获取底部导航栏的高度
*
* @return 底部导航栏的高度
*/
public static int getNavBarHeight() {
int result = 0;
int resourceId = 0;
// 判断底部导航栏是否显示
int rid = SUtils.getApp().getResources().getIdentifier("config_showNavigationBar", "bool", "android");
if (rid != 0) {
resourceId = SUtils.getApp().getResources().getIdentifier("navigation_bar_height", "dimen", "android");
if (resourceId > 0) {
result = SUtils.getApp().getResources().getDimensionPixelSize(resourceId);
}
}
return result;
}
/**
* 判断是否有底部导航栏
*
* @return {@code true}: 有底部导航栏<br>{@code false}: 没有底部导航栏
*/
public static boolean hasNavigationBar() {
boolean hasNavigationBar = false;
Resources rs = SUtils.getApp().getResources();
int id = rs.getIdentifier("config_showNavigationBar", "bool", "android");
if (id > 0)
hasNavigationBar = rs.getBoolean(id);
try {
Class systemPropertiesClass = Class.forName("android.os.SystemProperties");
Method m = systemPropertiesClass.getMethod("get", String.class);
String navBarOverride = (String) m.invoke(systemPropertiesClass, "qemu.hw.mainkeys");
if (navBarOverride.equals("1")) {
hasNavigationBar = false;
} else if (navBarOverride.equals("0")) {
hasNavigationBar = true;
}
} catch (Exception e) {
e.printStackTrace();
}
return hasNavigationBar;
}
/**
* 截屏
*
* @param activity
* @return 返回的 bitmap 包括状态栏
*/
public static Bitmap screenShot(@NonNull Activity activity) {
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bmp = view.getDrawingCache();
Point point = getScreenSize();
Bitmap bp = Bitmap.createBitmap(bmp, 0, 0, point.x, point.y);
view.destroyDrawingCache();
return bp;
}
/**
* 截屏
*
* @param activity
* @return 返回的 bitmap 不包括状态栏
*/
public static Bitmap screenShotNoStatusBar(@NonNull Activity activity) {
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bmp = view.getDrawingCache();
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;
Point point = getScreenSize();
Bitmap bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, point.x, point.y);
view.destroyDrawingCache();
return bp;
}
/**
* 设置屏幕为全屏
* <p>需在 {@code setContentView} 之前调用</p>
*
* @param activity activity
*/
public static void setFullScreen(@NonNull Activity activity) {
activity.requestWindowFeature(Window.FEATURE_NO_TITLE);
activity.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
}
/**
* 设置屏幕为横屏
* <p>还有一种就是在 Activity 中加属性 android:screenOrientation="landscape"</p>
* <p>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</p>
* <p>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</p>
* <p>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</p>
*
* @param activity activity
*/
public static void setLandscape(@NonNull Activity activity) {
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}
/**
* 设置屏幕为竖屏
*
* @param activity activity
*/
public static void setPortrait(@NonNull final Activity activity) {
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
/**
* 判断是否横屏
*
* @return {@code true}: 是<br>{@code false}: 否
*/
public static boolean isLandscape() {
return SUtils.getApp().getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE;
}
/**
* 判断是否竖屏
*
* @return {@code true}: 是<br>{@code false}: 否
*/
public static boolean isPortrait() {
return SUtils.getApp().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(@NonNull 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;
}
}
/**
* 判断是否锁屏
*
* @return {@code true}: 是<br>{@code false}: 否
*/
public static boolean isScreenLock() {
KeyguardManager km = (KeyguardManager) SUtils.getApp().getSystemService(Context.KEYGUARD_SERVICE);
return km.inKeyguardRestrictedInputMode();
}
/**
* 设置进入休眠时长
*
* @param duration 时长
*/
public static void setSleepTime(final int duration) {
Settings.System.putInt(SUtils.getApp().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 {@link #GET_SLEEPTIME_ERROR}
*/
public static int getSleepTime() {
try {
return Settings.System.getInt(SUtils.getApp().getContentResolver(), Settings.System.SCREEN_OFF_TIMEOUT);
} catch (Settings.SettingNotFoundException e) {
e.printStackTrace();
return GET_SLEEPTIME_ERROR;
}
}
/**
* 判断是否是平板
*
* @return {@code true}: 是<br>{@code false}: 否
*/
public static boolean isTablet() {
return (SUtils.getApp().getResources().getConfiguration().screenLayout
& Configuration.SCREENLAYOUT_SIZE_MASK)
>= Configuration.SCREENLAYOUT_SIZE_LARGE;
}
}屏幕相关工具类
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