android view statusBar 沉浸式
说到Android 状态栏沉浸式体验，不得不说这是代码设计者留给开发者的锅，版本系统api 割裂、表现不一致。后续的版本没有兼容之前的版本，导致开发者要兼容不同的版本，然后一个简单的功能非要搞的考虑各种情况，一大堆代码，纯粹是给开发者找事干，说实话，这些功能本来就可以用一句话搞定的，诶不说了，贴出自己的理解，主要是给自己看的，其他人也可参考。
再说一句，这些东西其实没必要太深入了解，没有普适性，拿别人总结好的来用，最好。因为，你即使了解了，那另一个开发系统iOS 其实可能没有这些问题，那你掌握的这一点知识其实没有用。
参考资料，主要是参考了 https://www.jianshu.com/p/752f4551e134 和其提供的工具类；在其基础上，我在说说自己的理解：想要实现沉浸式状态栏，无非是两种思路：a 通过设置透明，把内容区域的颜色过渡到状态栏； b 设置颜色，把状态栏颜色设置成内容区域的颜色；
先说说官方网站 对这个点的讨论 ，官网主要是说如何
- 调暗系统栏
// This example uses decor view, but you can use any visible view. View decorView = getActivity().getWindow().getDecorView(); int uiOptions = View.SYSTEM_UI_FLAG_LOW_PROFILE; decorView.setSystemUiVisibility(uiOptions)
- 隐藏状态栏、导航栏
- 开启全屏模式
- 监听界面可见度
这些对应上面的a 方法，通过setSystemUiVisibility 、SYSTEM_UI_FLAG 设置；现在有个问题是官网和现在大多数的博客讲的并不一致，官网仅仅区分了4.0 之下和 4.1 之上，并没有像博客区分4.4 、5.0 、6.0 。二者的思路不是一样的，所以这就是一个问题，我其实也没有搞明白为啥博客上的思路没有按照官网上说的来（我们这边的应用基本没有用actionBar，跟google 推行的主流不一样，所用的主题好像也是noAcitonBar，noTitle ，然后自己定义一个titlebar，野路子玩法，野路子解决），但总的来说二者还是有一些联系的，这些联系就是一些方法、或者思路。其实，也没有必要搞的很清楚，原因就是我上面说的。
好了，按照网上的一些博客上说的，他们大致解决思路：先选定一个主题， 一般是noActionBar 的；
加上一个工具类：
package com.jaeger.library;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Build;
import android.support.annotation.ColorInt;
import android.support.annotation.IntRange;
import android.support.annotation.NonNull;
import android.support.design.widget.CoordinatorLayout;
import android.support.v4.widget.DrawerLayout;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.LinearLayout;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
/**
* Created by Jaeger on 16/2/14.
*
* Email: [email protected]
* GitHub: https://github.com/laobie
*/
public class StatusBarUtil {
public static final int DEFAULT_STATUS_BAR_ALPHA = 112;
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 TAG_KEY_HAVE_SET_OFFSET = -123;
/**
* 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);
}
}
/**
* 为滑动返回界面设置状态栏颜色
*
* @param activity 需要设置的activity
* @param color 状态栏颜色值
*/
public static void setColorForSwipeBack(Activity activity, int color) {
setColorForSwipeBack(activity, color, DEFAULT_STATUS_BAR_ALPHA);
}
/**
* 为滑动返回界面设置状态栏颜色
*
* @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 setColorForSwipeBack(Activity activity, @ColorInt int color,
@IntRange(from = 0, to = 255) int statusBarAlpha) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
ViewGroup contentView = ((ViewGroup) activity.findViewById(android.R.id.content));
View rootView = contentView.getChildAt(0);
int statusBarHeight = getStatusBarHeight(activity);
if (rootView != null && rootView instanceof CoordinatorLayout) {
final CoordinatorLayout coordinatorLayout = (CoordinatorLayout) rootView;
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
coordinatorLayout.setFitsSystemWindows(false);
contentView.setBackgroundColor(calculateStatusColor(color, statusBarAlpha));
boolean isNeedRequestLayout = contentView.getPaddingTop() < statusBarHeight;
if (isNeedRequestLayout) {
contentView.setPadding(0, statusBarHeight, 0, 0);
coordinatorLayout.post(new Runnable() {
@Override
public void run() {
coordinatorLayout.requestLayout();
}
});
}
} else {
coordinatorLayout.setStatusBarBackgroundColor(calculateStatusColor(color, statusBarAlpha));
}
} else {
contentView.setPadding(0, statusBarHeight, 0, 0);
contentView.setBackgroundColor(calculateStatusColor(color, statusBarAlpha));
}
setTransparentForWindow(activity);
}
}
/**
* 设置状态栏纯色 不加半透明效果
*
* @param activity 需要设置的 activity
* @param color 状态栏颜色值
*/
public static void setColorNoTranslucent(Activity activity, @ColorInt int color) {
setColor(activity, color, 0);
}
/**
* 设置状态栏颜色(5.0以下无半透明效果,不建议使用)
*
* @param activity 需要设置的 activity
* @param color 状态栏颜色值
*/
@Deprecated
public static void setColorDiff(Activity activity, @ColorInt int color) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
return;
}
transparentStatusBar(activity);
ViewGroup contentView = (ViewGroup) activity.findViewById(android.R.id.content);
// 移除半透明矩形,以免叠加
View fakeStatusBarView = contentView.findViewById(FAKE_STATUS_BAR_VIEW_ID);
if (fakeStatusBarView != null) {
if (fakeStatusBarView.getVisibility() == View.GONE) {
fakeStatusBarView.setVisibility(View.VISIBLE);
}
fakeStatusBarView.setBackgroundColor(color);
} else {
contentView.addView(createStatusBarView(activity, color));
}
setRootView(activity);
}
/**
* 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);
}
/**
* 针对根布局是 CoordinatorLayout, 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 setTranslucentForCoordinatorLayout(Activity activity, @IntRange(from = 0, to = 255) int statusBarAlpha) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
return;
}
transparentStatusBar(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);
}
/**
* 使状态栏透明(5.0以上半透明效果,不建议使用)
*
* 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
*/
@Deprecated
public static void setTranslucentDiff(Activity activity) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
// 设置状态栏透明
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
setRootView(activity);
}
}
/**
* 为DrawerLayout 布局设置状态栏变色
*
* @param activity 需要设置的activity
* @param drawerLayout DrawerLayout
* @param color 状态栏颜色值
*/
public static void setColorForDrawerLayout(Activity activity, DrawerLayout drawerLayout, @ColorInt int color) {
setColorForDrawerLayout(activity, drawerLayout, color, DEFAULT_STATUS_BAR_ALPHA);
}
/**
* 为DrawerLayout 布局设置状态栏颜色,纯色
*
* @param activity 需要设置的activity
* @param drawerLayout DrawerLayout
* @param color 状态栏颜色值
*/
public static void setColorNoTranslucentForDrawerLayout(Activity activity, DrawerLayout drawerLayout, @ColorInt int color) {
setColorForDrawerLayout(activity, drawerLayout, color, 0);
}
/**
* 为DrawerLayout 布局设置状态栏变色
*
* @param activity 需要设置的activity
* @param drawerLayout DrawerLayout
* @param color 状态栏颜色值
* @param statusBarAlpha 状态栏透明度
*/
public static void setColorForDrawerLayout(Activity activity, DrawerLayout drawerLayout, @ColorInt int color,
@IntRange(from = 0, to = 255) int statusBarAlpha) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
return;
}
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);
} else {
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
}
// 生成一个状态栏大小的矩形
// 添加 statusBarView 到布局中
ViewGroup contentLayout = (ViewGroup) drawerLayout.getChildAt(0);
View fakeStatusBarView = contentLayout.findViewById(FAKE_STATUS_BAR_VIEW_ID);
if (fakeStatusBarView != null) {
if (fakeStatusBarView.getVisibility() == View.GONE) {
fakeStatusBarView.setVisibility(View.VISIBLE);
}
fakeStatusBarView.setBackgroundColor(color);
} else {
contentLayout.addView(createStatusBarView(activity, color), 0);
}
// 内容布局不是 LinearLayout 时,设置padding top
if (!(contentLayout instanceof LinearLayout) && contentLayout.getChildAt(1) != null) {
contentLayout.getChildAt(1)
.setPadding(contentLayout.getPaddingLeft(), getStatusBarHeight(activity) + contentLayout.getPaddingTop(),
contentLayout.getPaddingRight(), contentLayout.getPaddingBottom());
}
// 设置属性
setDrawerLayoutProperty(drawerLayout, contentLayout);
addTranslucentView(activity, statusBarAlpha);
}
/**
* 设置 DrawerLayout 属性
*
* @param drawerLayout DrawerLayout
* @param drawerLayoutContentLayout DrawerLayout 的内容布局
*/
private static void setDrawerLayoutProperty(DrawerLayout drawerLayout, ViewGroup drawerLayoutContentLayout) {
ViewGroup drawer = (ViewGroup) drawerLayout.getChildAt(1);
drawerLayout.setFitsSystemWindows(false);
drawerLayoutContentLayout.setFitsSystemWindows(false);
drawerLayoutContentLayout.setClipToPadding(true);
drawer.setFitsSystemWindows(false);
}
/**
* 为DrawerLayout 布局设置状态栏变色(5.0以下无半透明效果,不建议使用)
*
* @param activity 需要设置的activity
* @param drawerLayout DrawerLayout
* @param color 状态栏颜色值
*/
@Deprecated
public static void setColorForDrawerLayoutDiff(Activity activity, DrawerLayout drawerLayout, @ColorInt int color) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
// 生成一个状态栏大小的矩形
ViewGroup contentLayout = (ViewGroup) drawerLayout.getChildAt(0);
View fakeStatusBarView = contentLayout.findViewById(FAKE_STATUS_BAR_VIEW_ID);
if (fakeStatusBarView != null) {
if (fakeStatusBarView.getVisibility() == View.GONE) {
fakeStatusBarView.setVisibility(View.VISIBLE);
}
fakeStatusBarView.setBackgroundColor(calculateStatusColor(color, DEFAULT_STATUS_BAR_ALPHA));
} else {
// 添加 statusBarView 到布局中
contentLayout.addView(createStatusBarView(activity, color), 0);
}
// 内容布局不是 LinearLayout 时,设置padding top
if (!(contentLayout instanceof LinearLayout) && contentLayout.getChildAt(1) != null) {
contentLayout.getChildAt(1).setPadding(0, getStatusBarHeight(activity), 0, 0);
}
// 设置属性
setDrawerLayoutProperty(drawerLayout, contentLayout);
}
}
/**
* 为 DrawerLayout 布局设置状态栏透明
*
* @param activity 需要设置的activity
* @param drawerLayout DrawerLayout
*/
public static void setTranslucentForDrawerLayout(Activity activity, DrawerLayout drawerLayout) {
setTranslucentForDrawerLayout(activity, drawerLayout, DEFAULT_STATUS_BAR_ALPHA);
}
/**
* 为 DrawerLayout 布局设置状态栏透明
*
* @param activity 需要设置的activity
* @param drawerLayout DrawerLayout
*/
public static void setTranslucentForDrawerLayout(Activity activity, DrawerLayout drawerLayout,
@IntRange(from = 0, to = 255) int statusBarAlpha) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
return;
}
setTransparentForDrawerLayout(activity, drawerLayout);
addTranslucentView(activity, statusBarAlpha);
}
/**
* 为 DrawerLayout 布局设置状态栏透明
*
* @param activity 需要设置的activity
* @param drawerLayout DrawerLayout
*/
public static void setTransparentForDrawerLayout(Activity activity, DrawerLayout drawerLayout) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
return;
}
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);
} else {
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
}
ViewGroup contentLayout = (ViewGroup) drawerLayout.getChildAt(0);
// 内容布局不是 LinearLayout 时,设置padding top
if (!(contentLayout instanceof LinearLayout) && contentLayout.getChildAt(1) != null) {
contentLayout.getChildAt(1).setPadding(0, getStatusBarHeight(activity), 0, 0);
}
// 设置属性
setDrawerLayoutProperty(drawerLayout, contentLayout);
}
/**
* 为 DrawerLayout 布局设置状态栏透明(5.0以上半透明效果,不建议使用)
*
* @param activity 需要设置的activity
* @param drawerLayout DrawerLayout
*/
@Deprecated
public static void setTranslucentForDrawerLayoutDiff(Activity activity, DrawerLayout drawerLayout) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
// 设置状态栏透明
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
// 设置内容布局属性
ViewGroup contentLayout = (ViewGroup) drawerLayout.getChildAt(0);
contentLayout.setFitsSystemWindows(true);
contentLayout.setClipToPadding(true);
// 设置抽屉布局属性
ViewGroup vg = (ViewGroup) drawerLayout.getChildAt(1);
vg.setFitsSystemWindows(false);
// 设置 DrawerLayout 属性
drawerLayout.setFitsSystemWindows(false);
}
}
/**
* 为头部是 ImageView 的界面设置状态栏全透明
*
* @param activity 需要设置的activity
* @param needOffsetView 需要向下偏移的 View
*/
public static void setTransparentForImageView(Activity activity, View needOffsetView) {
setTranslucentForImageView(activity, 0, needOffsetView);
}
/**
* 为头部是 ImageView 的界面设置状态栏透明(使用默认透明度)
*
* @param activity 需要设置的activity
* @param needOffsetView 需要向下偏移的 View
*/
public static void setTranslucentForImageView(Activity activity, View needOffsetView) {
setTranslucentForImageView(activity, DEFAULT_STATUS_BAR_ALPHA, needOffsetView);
}
/**
* 为头部是 ImageView 的界面设置状态栏透明
*
* @param activity 需要设置的activity
* @param statusBarAlpha 状态栏透明度
* @param needOffsetView 需要向下偏移的 View
*/
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);
}
}
/**
* 为 fragment 头部是 ImageView 的设置状态栏透明
*
* @param activity fragment 对应的 activity
* @param needOffsetView 需要向下偏移的 View
*/
public static void setTranslucentForImageViewInFragment(Activity activity, View needOffsetView) {
setTranslucentForImageViewInFragment(activity, DEFAULT_STATUS_BAR_ALPHA, needOffsetView);
}
/**
* 为 fragment 头部是 ImageView 的设置状态栏透明
*
* @param activity fragment 对应的 activity
* @param needOffsetView 需要向下偏移的 View
*/
public static void setTransparentForImageViewInFragment(Activity activity, View needOffsetView) {
setTranslucentForImageViewInFragment(activity, 0, needOffsetView);
}
/**
* 为 fragment 头部是 ImageView 的设置状态栏透明
*
* @param activity fragment 对应的 activity
* @param statusBarAlpha 状态栏透明度
* @param needOffsetView 需要向下偏移的 View
*/
public static void setTranslucentForImageViewInFragment(Activity activity, @IntRange(from = 0, to = 255) int statusBarAlpha,
View needOffsetView) {
setTranslucentForImageView(activity, statusBarAlpha, needOffsetView);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
clearPreviousSetting(activity);
}
}
/**
* 隐藏伪状态栏 View
*
* @param activity 调用的 Activity
*/
public static void hideFakeStatusBarView(Activity activity) {
ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();
View fakeStatusBarView = decorView.findViewById(FAKE_STATUS_BAR_VIEW_ID);
if (fakeStatusBarView != null) {
fakeStatusBarView.setVisibility(View.GONE);
}
View fakeTranslucentView = decorView.findViewById(FAKE_TRANSLUCENT_VIEW_ID);
if (fakeTranslucentView != null) {
fakeTranslucentView.setVisibility(View.GONE);
}
}
@TargetApi(Build.VERSION_CODES.M)
public static void setLightMode(Activity activity) {
// setMIUIStatusBarDarkIcon(activity, true);
// setMeizuStatusBarDarkIcon(activity, true);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
activity.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
}
}
@TargetApi(Build.VERSION_CODES.M)
public static void setDarkMode(Activity activity) {
// setMIUIStatusBarDarkIcon(activity, false);
// setMeizuStatusBarDarkIcon(activity, false);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
activity.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
}
}
/**
* 修改 MIUI V6 以上状态栏颜色
*/
private static void setMIUIStatusBarDarkIcon(@NonNull Activity activity, boolean darkIcon) {
Class clazz = activity.getWindow().getClass();
try {
Class layoutParams = Class.forName("android.view.MiuiWindowManager$LayoutParams");
Field field = layoutParams.getField("EXTRA_FLAG_STATUS_BAR_DARK_MODE");
int darkModeFlag = field.getInt(layoutParams);
Method extraFlagField = clazz.getMethod("setExtraFlags", int.class, int.class);
extraFlagField.invoke(activity.getWindow(), darkIcon ? darkModeFlag : 0, darkModeFlag);
} catch (Exception e) {
//e.printStackTrace();
}
}
/**
* 修改魅族状态栏字体颜色 Flyme 4.0
*/
private static void setMeizuStatusBarDarkIcon(@NonNull Activity activity, boolean darkIcon) {
try {
WindowManager.LayoutParams lp = activity.getWindow().getAttributes();
Field darkFlag = WindowManager.LayoutParams.class.getDeclaredField("MEIZU_FLAG_DARK_STATUS_BAR_ICON");
Field meizuFlags = WindowManager.LayoutParams.class.getDeclaredField("meizuFlags");
darkFlag.setAccessible(true);
meizuFlags.setAccessible(true);
int bit = darkFlag.getInt(null);
int value = meizuFlags.getInt(lp);
if (darkIcon) {
value |= bit;
} else {
value &= ~bit;
}
meizuFlags.setInt(lp, value);
activity.getWindow().setAttributes(lp);
} catch (Exception e) {
//e.printStackTrace();
}
}
///
@TargetApi(Build.VERSION_CODES.KITKAT)
private static void clearPreviousSetting(Activity activity) {
ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();
View fakeStatusBarView = decorView.findViewById(FAKE_STATUS_BAR_VIEW_ID);
if (fakeStatusBarView != null) {
decorView.removeView(fakeStatusBarView);
ViewGroup rootView = (ViewGroup) ((ViewGroup) activity.findViewById(android.R.id.content)).getChildAt(0);
rootView.setPadding(0, 0, 0, 0);
}
}
/**
* 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 = (ViewGroup) 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));
}
}
/**
* 生成一个和状态栏大小相同的彩色矩形条
*
* @param activity 需要设置的 activity
* @param color 状态栏颜色值
* @return 状态栏矩形条
*/
private static View createStatusBarView(Activity activity, @ColorInt int color) {
return createStatusBarView(activity, color, 0);
}
/**
* 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;
}
/**
* 设置根布局参数
*/
private static void setRootView(Activity activity) {
ViewGroup parent = (ViewGroup) 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);
}
}
/**
* 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);
}
}
/**
* 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) {
// 获得状态栏高度
int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
return context.getResources().getDimensionPixelSize(resourceId);
}
/**
* 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;
}
}
比如：我们可以在BaseAcvity 中onCreate 中
setTranslucent（this）；
setLightMode(this);
第一个方法 是设置沉浸式，第二个方法是解决主题色和状态栏颜色相同（比如白色）时，看不到状态栏的问题；大于4.4 设置FLAG_TRANSLUCENT_STATUS ；大于 21 ，通过 setStatusBarColor 实现；System_ui_flag_light_status_bar 这个状态栏是解决和状态栏颜色一样的；
/**
* Flag indicating that this Window is responsible for drawing the background for the
* system bars. If set, the system bars are drawn with a transparent background and the
* corresponding areas in this window are filled with the colors specified in
* {@link Window#getStatusBarColor()} and {@link Window#getNavigationBarColor()}.
*/
public static final int FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS = 0x80000000;
设置了FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS,表明会Window负责系统bar的background 绘制，绘制透明背景的系统bar（状态栏和导航栏），然后用getStatusBarColor()和getNavigationBarColor()的颜色填充相应的区域。这就是Android 5.0 以上实现沉浸式导航栏的原理。
第二种方法是通过设置颜色来实现，即调用 setColor（this， “color”）在baseActvity ，如果某个界面想要不同的颜色则可以通过 setColor 去覆盖baseActivity 界面中的设置。本质和第一种一样。
最后，结合我前面的推荐文章，在好好了解一下，就差不多了。