public class StatusBarUtils {
public static void initStatusBar(Window window, View view, int color, boolean transparent) {
// 如果系统版本大于等于 Android 5.0(Lollipop)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
if (transparent) {
// 设置状态栏为透明,并且布局充满全屏
window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
window.setStatusBarColor(Color.TRANSPARENT);
} else {
// 设置状态栏颜色为传入的颜色值
window.setStatusBarColor(color);
}
// 如果系统版本大于等于 Android 6.0(Marshmallow)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
// 设置状态栏文字颜色为传入的颜色值
window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
}
}
// 设置顶部内边距等于状态栏高度(使内容在状态栏的下方显示)
int statusBarHeight = ViewUtils.getStatusBarHeight(view.getContext());
view.setPadding(0, statusBarHeight, 0, 0);
}
/**
* 隐藏状态栏
*/
public static void hideStatusBar(Activity activity) {
// 获取窗口
Window window = activity.getWindow();
// 对Android版本进行检查,选择不同的方法实现隐藏状态栏
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
// API Level 19 及以上(Android 4.4及以上)
View decorView = window.getDecorView();
int option = View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
decorView.setSystemUiVisibility(option);
} else if (Build.VERSION.SDK_INT >= 16) {
// API Level 16 到 18 (Android 4.1 到 Android 4.3)
View decorView = window.getDecorView();
int option = View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(option);
} else {
// API Level 16以下(Android 4.1以下)
window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
}
}
/**
* 显示状态栏
*
* @param activity 当前的Activity
*/
public static void showStatusBar(Activity activity) {
// 获取窗口
Window window = activity.getWindow();
// 对Android版本进行检查,选择不同的方法实现显示状态栏
if (Build.VERSION.SDK_INT < 16) {
// API Level 16以下(Android 4.1以下)
window.clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
} else {
// API Level 16 及以上(Android 4.1及以上)
View decorView = window.getDecorView();
int option = View.SYSTEM_UI_FLAG_VISIBLE;
decorView.setSystemUiVisibility(option);
}
}
}
public class ViewUtils {
/**
* 获取状态栏高度
*
* @param context 应用上下文
* @return int 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;
}
/**
* 计算Item之间的间距
*
* @param columnCount 列数
* @param ratio 宽高比
* @return int[] 包含水平和垂直间距的数组
*/
public static int[] calculateSpacing(int columnCount, float ratio) {
// 计算屏幕宽度
DisplayMetrics displayMetrics = Resources.getSystem().getDisplayMetrics();
int screenWidth = displayMetrics.widthPixels;
// 计算每个item的宽度
int itemWidth = (screenWidth - (columnCount + 1) * 10) / columnCount;
// 计算item高度
int itemHeight = (int) (itemWidth * ratio);
// 计算水平间距和垂直间距
int horizontalSpacing = (screenWidth - itemWidth * columnCount) / (columnCount + 1);
int verticalSpacing = (int) (horizontalSpacing * ratio);
return new int[]{horizontalSpacing, verticalSpacing};
}
}