Android沉浸式状态栏，一行代码搞定
参考博客：StatusBarUtil 状态栏工具类（实现沉浸式状态栏/变色状态栏）
用法
- 设置状态栏颜色（默认半透明）
- 为头部是 ImageView 的界面设置状态栏透明
- 状态栏透明度（默认半透明）
- 设置状态栏资源（适用于状态栏有渐变色的情况）
代码
1.Java代码
public class StatusBarUtil {
private static final int TAG_KEY_HAVE_SET_OFFSET = -123;
private static final int FAKE_STATUS_BAR_VIEW_ID = R.id.statusbarutil_fake_status_bar_view;
private static final int FAKE_TRANSLUCENT_VIEW_ID = R.id.statusbarutil_translucent_view;
private static final int DEFAULT_STATUS_BAR_ALPHA = 112;
/**
* 设置状态栏颜色
*
* @param activity 需要设置的 activity
* @param color 状态栏颜色值
*/
public static void setColor(Activity activity, @ColorInt int color) {
setColor(activity, color, DEFAULT_STATUS_BAR_ALPHA);
}
/**
* 设置状态栏颜色
*
* @param activity 需要设置的activity
* @param color 状态栏颜色值
* @param statusBarAlpha 状态栏透明度
*/
public static void setColor(Activity activity, @ColorInt int color, @IntRange(from = 0, to = 255) int statusBarAlpha) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
activity.getWindow().setStatusBarColor(calculateStatusColor(color, statusBarAlpha));
} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();
View fakeStatusBarView = decorView.findViewById(FAKE_STATUS_BAR_VIEW_ID);
if (fakeStatusBarView != null) {
if (fakeStatusBarView.getVisibility() == View.GONE) {
fakeStatusBarView.setVisibility(View.VISIBLE);
}
fakeStatusBarView.setBackgroundColor(calculateStatusColor(color, statusBarAlpha));
} else {
decorView.addView(createStatusBarView(activity, color, statusBarAlpha));
}
setRootView(activity);
}
}
/**
* 为头部是 ImageView 的界面设置状态栏透明
*/
public static void setTranslucentForImageView(Activity activity, @IntRange(from = 0, to = 255) int statusBarAlpha, View needOffsetView) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
return;
}
setTransparentForWindow(activity);
addTranslucentView(activity, statusBarAlpha);
if (needOffsetView != null) {
Object haveSetOffset = needOffsetView.getTag(TAG_KEY_HAVE_SET_OFFSET);
if (haveSetOffset != null && (Boolean) haveSetOffset) {
return;
}
ViewGroup.MarginLayoutParams layoutParams = (ViewGroup.MarginLayoutParams) needOffsetView.getLayoutParams();
layoutParams.setMargins(layoutParams.leftMargin, layoutParams.topMargin + getStatusBarHeight(activity), layoutParams.rightMargin, layoutParams.bottomMargin);
needOffsetView.setTag(TAG_KEY_HAVE_SET_OFFSET, true);
}
}
/**
* 使状态栏半透明
*
* 适用于图片作为背景的界面,此时需要图片填充到状态栏
*
* @param activity 需要设置的activity
*/
public static void setTranslucent(Activity activity) {
setTranslucent(activity, DEFAULT_STATUS_BAR_ALPHA);
}
/**
* 使状态栏半透明
*
* 适用于图片作为背景的界面,此时需要图片填充到状态栏
*
* @param activity 需要设置的activity
* @param statusBarAlpha 状态栏透明度
*/
public static void setTranslucent(Activity activity, @IntRange(from = 0, to = 255) int statusBarAlpha) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
return;
}
setTransparent(activity);
addTranslucentView(activity, statusBarAlpha);
}
/**
* 设置状态栏全透明
*
* @param activity 需要设置的activity
*/
public static void setTransparent(Activity activity) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
return;
}
transparentStatusBar(activity);
setRootView(activity);
}
/**
* 设置状态栏资源
*
* @param activity 需要设置的activity
* @param drawableRes 状态栏颜色值
*/
public static void setDrawable(Activity activity, @DrawableRes int drawableRes) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
activity.getWindow().setStatusBarColor(Color.TRANSPARENT);
ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();
View fakeStatusBarView = decorView.findViewById(FAKE_STATUS_BAR_VIEW_ID);
if (fakeStatusBarView != null) {
if (fakeStatusBarView.getVisibility() == View.GONE) {
fakeStatusBarView.setVisibility(View.VISIBLE);
}
fakeStatusBarView.setBackgroundResource(drawableRes);
} else {
decorView.addView(createStatusBarView(activity, drawableRes));
}
setRootView(activity);
}
}
/**
* 生成一个和状态栏大小相同的矩形条
*
* @param activity 需要设置的activity
* @param drawableId 状态栏背景
* @return 状态栏矩形条
*/
private static View createStatusBarView(Activity activity, @DrawableRes int drawableId) {
// 绘制一个和状态栏一样高的矩形
View statusBarView = new View(activity);
LinearLayout.LayoutParams params =
new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, getStatusBarHeight(activity));
statusBarView.setLayoutParams(params);
statusBarView.setBackgroundResource(drawableId);
statusBarView.setId(FAKE_STATUS_BAR_VIEW_ID);
return statusBarView;
}
/**
* 生成一个和状态栏大小相同的半透明矩形条
*
* @param activity 需要设置的activity
* @param color 状态栏颜色值
* @param alpha 透明值
* @return 状态栏矩形条
*/
private static View createStatusBarView(Activity activity, @ColorInt int color, int alpha) {
// 绘制一个和状态栏一样高的矩形
View statusBarView = new View(activity);
LinearLayout.LayoutParams params =
new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, getStatusBarHeight(activity));
statusBarView.setLayoutParams(params);
statusBarView.setBackgroundColor(calculateStatusColor(color, alpha));
statusBarView.setId(FAKE_STATUS_BAR_VIEW_ID);
return statusBarView;
}
/**
* 计算状态栏颜色
*
* @param color color值
* @param alpha alpha值
* @return 最终的状态栏颜色
*/
private static int calculateStatusColor(@ColorInt int color, int alpha) {
if (alpha == 0) {
return color;
}
float a = 1 - alpha / 255f;
int red = color >> 16 & 0xff;
int green = color >> 8 & 0xff;
int blue = color & 0xff;
red = (int) (red * a + 0.5);
green = (int) (green * a + 0.5);
blue = (int) (blue * a + 0.5);
return 0xff << 24 | red << 16 | green << 8 | blue;
}
/**
* 使状态栏透明
*/
@TargetApi(Build.VERSION_CODES.KITKAT)
private static void transparentStatusBar(Activity activity) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
activity.getWindow().setStatusBarColor(Color.TRANSPARENT);
} else {
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
}
}
/**
* 设置根布局参数
*/
private static void setRootView(Activity activity) {
ViewGroup parent = activity.findViewById(android.R.id.content);
for (int i = 0, count = parent.getChildCount(); i < count; i++) {
View childView = parent.getChildAt(i);
if (childView instanceof ViewGroup) {
childView.setFitsSystemWindows(true);
((ViewGroup) childView).setClipToPadding(true);
}
}
}
/**
* 设置透明
*/
private static void setTransparentForWindow(Activity activity) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
activity.getWindow().setStatusBarColor(Color.TRANSPARENT);
activity.getWindow()
.getDecorView()
.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
activity.getWindow()
.setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
}
}
/**
* 添加半透明矩形条
*
* @param activity 需要设置的 activity
* @param statusBarAlpha 透明值
*/
private static void addTranslucentView(Activity activity, @IntRange(from = 0, to = 255) int statusBarAlpha) {
ViewGroup contentView = activity.findViewById(android.R.id.content);
View fakeTranslucentView = contentView.findViewById(FAKE_TRANSLUCENT_VIEW_ID);
if (fakeTranslucentView != null) {
if (fakeTranslucentView.getVisibility() == View.GONE) {
fakeTranslucentView.setVisibility(View.VISIBLE);
}
fakeTranslucentView.setBackgroundColor(Color.argb(statusBarAlpha, 0, 0, 0));
} else {
contentView.addView(createTranslucentStatusBarView(activity, statusBarAlpha));
}
}
/**
* 创建半透明矩形 View
*
* @param alpha 透明值
* @return 半透明 View
*/
private static View createTranslucentStatusBarView(Activity activity, int alpha) {
// 绘制一个和状态栏一样高的矩形
View statusBarView = new View(activity);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, getStatusBarHeight(activity));
statusBarView.setLayoutParams(params);
statusBarView.setBackgroundColor(Color.argb(alpha, 0, 0, 0));
statusBarView.setId(FAKE_TRANSLUCENT_VIEW_ID);
return statusBarView;
}
/**
* 获取状态栏高度
*
* @param context context
* @return 状态栏高度
*/
private static int getStatusBarHeight(Context context) {
int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
int height = context.getResources().getDimensionPixelSize(resourceId);
return height;
}
}
2.新建 ids.xml 文件
<?xml version="1.0" encoding="utf-8"?>
<resources>
<item name="statusbarutil_fake_status_bar_view" type="id" />
<item name="statusbarutil_translucent_view" type="id" />
</resources>