android中和屏幕相关的操作

最新推荐文章于 2021-05-27 07:38:42 发布

CCW_2015

最新推荐文章于 2021-05-27 07:38:42 发布

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分类专栏：界面文章标签： android 屏幕分辨率

本文链接：https://blog.csdn.net/chenchuanwen111/article/details/52574241

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/**
* desc : 屏幕相关工具类
* 获取手机分辨率 getDeviceWidth、getDeviceHeight
* 设置透明状态栏(api大于19方可使用) setTransparentStatusBar
* 隐藏状态栏(注释萌萌哒) hideStatusBar
* 获取状态栏高度 getStatusBarHeight
* 判断状态栏是否存在 isStatusBarExists
* 获取ActionBar高度 getActionBarHeight
* 显示通知栏 showNotificationBar
* 隐藏通知栏 hideNotificationBar
* 设置屏幕为横屏(注释萌萌哒) setLandscape
* 获取屏幕截图 snapShotWithStatusBar、snapShotWithoutStatusBar
* 判断是否锁屏 isScreenLock
*/
public class ScreenUtils {

private ScreenUtils() {
}

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

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

/**
 * 设置透明状态栏(api大于19方可使用)
 * <p>可在Activity的onCreat()中调用</p>
 * <p>需在顶部控件布局中加入以下属性让内容出现在状态栏之下</p>
 * <p>android:clipToPadding="true"</p>
 * <p>android:fitsSystemWindows="true"</p>
 *
 * @param activity activity
 */
public static void setTransparentStatusBar(Activity activity) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        //透明状态栏
        activity.getWindow().addFlags(LayoutParams.FLAG_TRANSLUCENT_STATUS);
        //透明导航栏
        activity.getWindow().addFlags(LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
    }
}

/**
 * 隐藏状态栏
 * <p>也就是设置全屏，一定要在setContentView之前调用，否则报错</p>
 * <p>此方法Activity可以继承AppCompatActivity</p>
 * <p>启动的时候状态栏会显示一下再隐藏，比如QQ的欢迎界面</p>
 * <p>在配置文件中Activity加属性android:theme="@android:style/Theme.NoTitleBar.Fullscreen"</p>
 * <p>如加了以上配置Activity不能继承AppCompatActivity，会报错</p>
 *
 * @param activity activity
 */
public static void hideStatusBar(Activity activity) {
    activity.requestWindowFeature(Window.FEATURE_NO_TITLE);
    activity.getWindow().setFlags(LayoutParams.FLAG_FULLSCREEN,
            LayoutParams.FLAG_FULLSCREEN);
}

/**
 * 获取状态栏高度
 *
 * @param context 上下文
 * @return 状态栏高度
 */
public static int getStatusBarHeight(Context context) {
    int result = 0;
    int resourceId = context.getResources()
            .getIdentifier("status_bar_height", "dimen", "android");
    if (resourceId > 0) {
        result = context.getResources().getDimensionPixelSize(resourceId);
    }
    return result;
}

/**
 * 判断状态栏是否存在
 *
 * @param activity activity
 * @return {@code true}: 存在<br>{@code false}: 不存在
 */
public static boolean isStatusBarExists(Activity activity) {
    LayoutParams params = activity.getWindow().getAttributes();
    return (params.flags & LayoutParams.FLAG_FULLSCREEN) != LayoutParams.FLAG_FULLSCREEN;
}

/**
 * 获取ActionBar高度
 *
 * @param activity activity
 * @return ActionBar高度
 */
public static int getActionBarHeight(Activity activity) {
    TypedValue tv = new TypedValue();
    if (activity.getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true)) {
        return TypedValue.complexToDimensionPixelSize(tv.data, activity.getResources().getDisplayMetrics());
    }
    return 0;
}

/**
 * 显示通知栏
 * <p>需添加权限 {@code <uses-permission android:name="android.permission.EXPAND_STATUS_BAR"/>}</p>
 *
 * @param context        上下文
 * @param isSettingPanel {@code true}: 打开设置<br>{@code false}: 打开通知
 */
public static void showNotificationBar(Context context, boolean isSettingPanel) {
    String methodName = (Build.VERSION.SDK_INT <= 16) ? "expand"
            : (isSettingPanel ? "expandSettingsPanel" : "expandNotificationsPanel");
    invokePanels(context, methodName);
}

/**
 * 隐藏通知栏
 * <p>需添加权限 {@code <uses-permission android:name="android.permission.EXPAND_STATUS_BAR"/>}</p>
 *
 * @param context 上下文
 */
public static void hideNotificationBar(Context context) {
    String methodName = (Build.VERSION.SDK_INT <= 16) ? "collapse" : "collapsePanels";
    invokePanels(context, methodName);
}

/**
 * 反射唤醒通知栏
 *
 * @param context    上下文
 * @param methodName 方法名
 */
private static void invokePanels(Context context, String methodName) {
    try {
        Object service = context.getSystemService("statusbar");
        Class<?> statusBarManager = Class.forName("android.app.StatusBarManager");
        Method expand = statusBarManager.getMethod(methodName);
        expand.invoke(service);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

/**
 * 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(Activity activity) {
    activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}

/**
 * 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();
    int width = getScreenWidth(activity);
    int height = getScreenHeight(activity);
    Bitmap bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
    view.destroyDrawingCache();
    return bp;
}

/**
 * 获取当前屏幕截图，不包含状态栏
 * <p>需要用到上面获取状态栏高度getStatusBarHeight的方法</p>
 *
 * @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 = getStatusBarHeight(activity);
    int width = getScreenWidth(activity);
    int height = getScreenHeight(activity);
    Bitmap bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height - statusBarHeight);
    view.destroyDrawingCache();
    return bp;
}

/**
 * 判断是否锁屏
 *
 * @param context 上下文
 * @return {@code true}: 是<br>{@code false}: 否
 */
public static boolean isScreenLock(Context context) {
    KeyguardManager km = (KeyguardManager) context
            .getSystemService(Context.KEYGUARD_SERVICE);
    return km.inKeyguardRestrictedInputMode();
}

}

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