一.在介绍状态栏之前，我们先回顾一下window下视图布局：
1.1 ContentView:我们通过activity.findViewById(Window.ID_ANDROID_CONTENT)获取的View，即得到是setContentView的View，实质是FrameLayout
1.2 ContentParent: ContentView的Parent,实质是LinearLayout.
1.3 ChildView : ContentView的第一个子View，即是Layout布局文件
再介绍一下相关的函数:
-
fitsSystemWindows, 该属性可以设置是否为系统 View 预留出空间, 当设置为 true 时,会预留出状态栏的空间.
-
ContentView, 实质为 ContentFrameLayout, 但是重写了 dispatchFitSystemWindows 方法, 所以对其设置 fitsSystemWindows 无效.
-
ContentParent, 实质为 FitWindowsLinearLayout, 里面第一个 View 是 ViewStubCompat, 如果主题没有设置 title ,它就不会 inflate .第二个 View 就是 ContentView.
5.0以上的处理:
自5.0引入 Material Design ,状态栏对开发者更加直接,可以直接调用 setStatusBarColor 来设置状态栏的颜色.
1.全屏模式：
Window window = activity.getWindow();
//设置透明状态栏,这样才能让 ContentView 向上
window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
//需要设置这个 flag 才能调用 setStatusBarColor 来设置状态栏颜色
window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
//设置状态栏颜色
window.setStatusBarColor(statusColor);
ViewGroup mContentView = (ViewGroup) activity.findViewById(Window.ID_ANDROID_CONTENT);
View mChildView = mContentView.getChildAt(0);
if (mChildView != null) {
//注意不是设置 ContentView 的 FitsSystemWindows, 而是设置 ContentView 的第一个子 View . 使其不为系统 View 预留空间.
ViewCompat.setFitsSystemWindows(mChildView, false);
}2.着色模式：
Window window = activity.getWindow();
//取消设置透明状态栏,使 ContentView 内容不再覆盖状态栏
window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
//需要设置这个 flag 才能调用 setStatusBarColor 来设置状态栏颜色
window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
//设置状态栏颜色
window.setStatusBarColor(statusColor);
ViewGroup mContentView = (ViewGroup) activity.findViewById(Window.ID_ANDROID_CONTENT);
View mChildView = mContentView.getChildAt(0);
if (mChildView != null) {
//注意不是设置 ContentView 的 FitsSystemWindows, 而是设置 ContentView 的第一个子 View . 预留出系统 View 的空间.
ViewCompat.setFitsSystemWindows(mChildView, true);
}4.4-5.0的处理:
4.4-5.0因为没有直接的 API 可以调用,需要自己兼容处理,网上的解决方法基本都是创建一下高度为状态栏的 View ,通过设置这个 View 的背景色来模拟状态栏. 这里我尝试了三种方法来兼容处理.
方法1: 向 ContentView 添加假 View , 设置 ChildView 的 marginTop 属性来模拟 fitsSystemWindows .
1. 全屏模式
Window window = activity.getWindow();
ViewGroup mContentView = (ViewGroup) activity.findViewById(Window.ID_ANDROID_CONTENT);
//首先使 ChildView 不预留空间
View mChildView = mContentView.getChildAt(0);
if (mChildView != null) {
ViewCompat.setFitsSystemWindows(mChildView, false);
}
int statusBarHeight = getStatusBarHeight(activity);
//需要设置这个 flag 才能设置状态栏
window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
//避免多次调用该方法时,多次移除了 View
if (mChildView != null && mChildView.getLayoutParams() != null && mChildView.getLayoutParams().height == statusBarHeight) {
//移除假的 View.
mContentView.removeView(mChildView);
mChildView = mContentView.getChildAt(0);
}
if (mChildView != null) {
FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) mChildView.getLayoutParams();
//清除 ChildView 的 marginTop 属性
if (lp != null && lp.topMargin >= statusBarHeight) {
lp.topMargin -= statusBarHeight;
mChildView.setLayoutParams(lp);
}
}2.着色模式:
Window window = activity.getWindow();
ViewGroup mContentView = (ViewGroup) activity.findViewById(Window.ID_ANDROID_CONTENT);
//First translucent status bar.
window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
int statusBarHeight = getStatusBarHeight(activity);
View mChildView = mContentView.getChildAt(0);
if (mChildView != null) {
FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) mChildView.getLayoutParams();
//如果已经为 ChildView 设置过了 marginTop, 再次调用时直接跳过
if (lp != null && lp.topMargin < statusBarHeight && lp.height != statusBarHeight) {
//不预留系统空间
ViewCompat.setFitsSystemWindows(mChildView, false);
lp.topMargin += statusBarHeight;
mChildView.setLayoutParams(lp);
}
}
View statusBarView = mContentView.getChildAt(0);
if (statusBarView != null && statusBarView.getLayoutParams() != null && statusBarView.getLayoutParams().height == statusBarHeight) {
//避免重复调用时多次添加 View
statusBarView.setBackgroundColor(statusColor);
return;
}
statusBarView = new View(activity);
ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, statusBarHeight);
statusBarView.setBackgroundColor(statusColor);
//向 ContentView 中添加假 View
mContentView.addView(statusBarView, 0, lp);方法2: 向 ContentParent 添加假 View ,设置 ContentView 和 ChildView 的 fitsSystemWindows.
全屏模式:
Window window = activity.getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
ViewGroup mContentView = (ViewGroup) activity.findViewById(Window.ID_ANDROID_CONTENT);
ViewGroup mContentParent = (ViewGroup) mContentView.getParent();
View statusBarView = mContentParent.getChildAt(0);
if (statusBarView != null && statusBarView.getLayoutParams() != null && statusBarView.getLayoutParams().height == getStatusBarHeight(activity)) {
//移除假的 View
mContentParent.removeView(statusBarView);
}
//ContentView 不预留空间
if (mContentParent.getChildAt(0) != null) {
ViewCompat.setFitsSystemWindows(mContentParent.getChildAt(0), false);
}
//ChildView 不预留空间
View mChildView = mContentView.getChildAt(0);
if (mChildView != null) {
ViewCompat.setFitsSystemWindows(mChildView, false);
}着色模式(会有一条黑线,无法解决):
Window window = activity.getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
ViewGroup mContentView = (ViewGroup) activity.findViewById(Window.ID_ANDROID_CONTENT);
ViewGroup mContentParent = (ViewGroup) mContentView.getParent();
View statusBarView = mContentParent.getChildAt(0);
if (statusBarView != null && statusBarView.getLayoutParams() != null && statusBarView.getLayoutParams().height == getStatusBarHeight(activity)) {
//避免重复调用时多次添加 View
statusBarView.setBackgroundColor(statusColor);
return;
}
//创建一个假的 View, 并添加到 ContentParent
statusBarView = new View(activity);
ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
getStatusBarHeight(activity));
statusBarView.setBackgroundColor(statusColor);
mContentParent.addView(statusBarView, 0, lp);
//ChildView 不需要预留系统空间
View mChildView = mContentView.getChildAt(0);
if (mChildView != null) {
ViewCompat.setFitsSystemWindows(mChildView, false);
} 方法3:向 ContentView 添加假 View , 设置 ChildView 的 fitsSystemWindows.
全屏模式:
Window window = activity.getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
ViewGroup mContentView = (ViewGroup) activity.findViewById(Window.ID_ANDROID_CONTENT);
View statusBarView = mContentView.getChildAt(0);
//移除假的 View
if (statusBarView != null && statusBarView.getLayoutParams() != null && statusBarView.getLayoutParams().height == getStatusBarHeight(activity)) {
mContentView.removeView(statusBarView);
}
//不预留空间
if (mContentView.getChildAt(0) != null) {
ViewCompat.setFitsSystemWindows(mContentView.getChildAt(0), false);
} 着色模式:
Window window = activity.getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
ViewGroup mContentView = (ViewGroup) activity.findViewById(Window.ID_ANDROID_CONTENT);
int statusBarHeight = getStatusBarHeight(activity);
View mTopView = mContentView.getChildAt(0);
if (mTopView != null && mTopView.getLayoutParams() != null && mTopView.getLayoutParams().height == statusBarHeight) {
//避免重复添加 View
mTopView.setBackgroundColor(statusColor);
return;
}
//使 ChildView 预留空间
if (mTopView != null) {
ViewCompat.setFitsSystemWindows(mTopView, true);
}
//添加假 View
mTopView = new View(activity);
ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, statusBarHeight);
mTopView.setBackgroundColor(statusColor);
mContentView.addView(mTopView, 0, lp);
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