輕松實現狀態欄顏色變化


忙太長一段時間了,回過頭來想想,還是不敢放松自己,今天就算熬夜也要堅持把這篇文章寫完。為了自己以后方便,在各種地方都要用到toolbar或者其他的自定義頂部欄、亦或是ActionBar。

在這里,已經整理了一個工具類,以后想怎么用就怎么用了。

第一種效果:

這里,狀態欄顏色一致,其實狀態欄這時候是設置了50的透明值的。看看布局代碼:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="huolongluo.statusbarsample.MainActivity">

    <include layout="@layout/toolbar" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

第一層用的ConstraintLayout,當然你也可以用別的,然后頂部是引用的一個ToolBar,如下:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.AppBarLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />

</android.support.design.widget.AppBarLayout>

ToolBar第一層用的AppBarLayout,用這個的話,必須要先引入design包,看布局包名也很明確了。還有一點,大家都知道,要使用ToolBar的話,必須要設置APP主題為NoActionBar:

要實現上面的效果,六句代碼,當然,要是使用一些別的框架結合的話,能更精簡。代碼如下:

 

第二種效果:

這就是很多人說的沉浸式。布局代碼就是一個ImageView:

然后java類三句代碼實現:

 

第三種效果(遮蓋狀態欄):

這個效果呢,布局文件和第二種一模一樣,然后看看java是怎么實現的吧,原來如此簡單~~:

一句給控件設置圖片的代碼,另加重寫onWindowFocusChanged方法,搞定!

 

看完這些,假如還需要別的效果其實也可以去做,程序員的生活就是這樣,需要自己一步步提高,舉一反三。OK,以上效果的實現呢,最最核心的東西來了---實現工具類(StatusBarUtils.java):

  1 package huolongluo.statusbarsample;
  2 
  3 import android.annotation.TargetApi;
  4 import android.app.Activity;
  5 import android.content.Context;
  6 import android.graphics.Color;
  7 import android.os.Build;
  8 import android.support.annotation.ColorInt;
  9 import android.util.DisplayMetrics;
 10 import android.view.Display;
 11 import android.view.Gravity;
 12 import android.view.View;
 13 import android.view.ViewGroup;
 14 import android.view.Window;
 15 import android.view.WindowManager;
 16 import android.widget.FrameLayout;
 17 
 18 /**
 19  * <p>
 20  * Created by 火龍裸先生 on 2017/8/24 0024.
 21  */
 22 
 23 public class StatusBarUtils {
 24 
 25     private Activity activity;
 26 
 27     public StatusBarUtils(Activity activity) {
 28         this.activity = activity;
 29     }
 30 
 31     @TargetApi(Build.VERSION_CODES.KITKAT)
 32     public void setColorBar(@ColorInt int color, int alpha) {
 33         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
 34             Window window = activity.getWindow();
 35             window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
 36             window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 37             window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
 38             int alphaColor = alpha == 0 ? color : calculateColor(color, alpha);
 39             window.setStatusBarColor(alphaColor);
 40             window.setNavigationBarColor(alphaColor);
 41         } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
 42             Window window = activity.getWindow();
 43             window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 44             int alphaColor = alpha == 0 ? color : calculateColor(color, alpha);
 45             ViewGroup decorView = (ViewGroup) window.getDecorView();
 46             decorView.addView(createStatusBarView(activity, alphaColor));
 47             if (navigationBarExist(activity)) {
 48                 decorView.addView(createNavBarView(activity, alphaColor));
 49                 window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
 50             }
 51             setRootView(activity, true);
 52         }
 53     }
 54 
 55 
 56     @TargetApi(Build.VERSION_CODES.KITKAT)
 57     public void setColorBar(@ColorInt int color) {
 58         setColorBar(color, 0);
 59     }
 60 
 61 
 62     @TargetApi(Build.VERSION_CODES.KITKAT)
 63     public void setColorBarForDrawer(@ColorInt int color, int alpha) {
 64         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
 65             Window window = activity.getWindow();
 66             ViewGroup decorView = (ViewGroup) window.getDecorView();
 67             int option = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
 68                     | View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
 69             if (navigationBarExist(activity)) {
 70                 option = option | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION;
 71             }
 72             decorView.setSystemUiVisibility(option);
 73             window.setNavigationBarColor(Color.TRANSPARENT);
 74             window.setStatusBarColor(Color.TRANSPARENT);
 75             int alphaColor = alpha == 0 ? color : calculateColor(color, alpha);
 76             decorView.addView(createStatusBarView(activity, alphaColor), 0);
 77             if (navigationBarExist(activity)) {
 78                 decorView.addView(createNavBarView(activity, alphaColor), 1);
 79             }
 80         } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
 81             Window window = activity.getWindow();
 82             window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 83             ViewGroup decorView = (ViewGroup) window.getDecorView();
 84             int alphaColor = alpha == 0 ? color : calculateColor(color, alpha);
 85             decorView.addView(createStatusBarView(activity, alphaColor), 0);
 86             if (navigationBarExist(activity)) {
 87                 window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
 88                 decorView.addView(createNavBarView(activity, alphaColor), 1);
 89             }
 90         }
 91     }
 92 
 93 
 94     @TargetApi(Build.VERSION_CODES.KITKAT)
 95     public void setColorBarForDrawer(@ColorInt int color) {
 96         setColorBarForDrawer(color, 0);
 97     }
 98 
 99 
100     @TargetApi(Build.VERSION_CODES.KITKAT)
101     public void setTransparentBar(@ColorInt int color, int alpha) {
102         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
103             Window window = activity.getWindow();
104             View decorView = window.getDecorView();
105             int option = View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
106                     | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
107                     | View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
108             decorView.setSystemUiVisibility(option);
109 
110             int finalColor = alpha == 0 ? Color.TRANSPARENT :
111                     Color.argb(alpha, Color.red(color), Color.green(color), Color.blue(color));
112 
113             window.setNavigationBarColor(finalColor);
114             window.setStatusBarColor(finalColor);
115 
116         } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
117             Window window = activity.getWindow();
118             window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
119             ViewGroup decorView = (ViewGroup) window.getDecorView();
120             int finalColor = alpha == 0 ? Color.TRANSPARENT :
121                     Color.argb(alpha, Color.red(color), Color.green(color), Color.blue(color));
122             decorView.addView(createStatusBarView(activity, finalColor));
123             if (navigationBarExist(activity)) {
124                 window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
125                 decorView.addView(createNavBarView(activity, finalColor));
126             }
127         }
128 
129     }
130 
131 
132     @TargetApi(Build.VERSION_CODES.KITKAT)
133     public void setImmersionBar() {
134         setTransparentBar(Color.TRANSPARENT, 0);
135     }
136 
137 
138     @TargetApi(Build.VERSION_CODES.KITKAT)
139     public void setHintBar() {
140         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
141             View decorView = activity.getWindow().getDecorView();
142             decorView.setSystemUiVisibility(
143                     View.SYSTEM_UI_FLAG_LAYOUT_STABLE
144                             | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
145                             | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
146                             | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
147                             | View.SYSTEM_UI_FLAG_FULLSCREEN
148                             | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
149         }
150     }
151 
152 
153     private View createStatusBarView(Context context, @ColorInt int color) {
154         View mStatusBarTintView = new View(context);
155         FrameLayout.LayoutParams params = new FrameLayout.LayoutParams
156                 (FrameLayout.LayoutParams.MATCH_PARENT, getStatusBarHeight(context));
157         params.gravity = Gravity.TOP;
158         mStatusBarTintView.setLayoutParams(params);
159         mStatusBarTintView.setBackgroundColor(color);
160         return mStatusBarTintView;
161     }
162 
163     private View createNavBarView(Context context, @ColorInt int color) {
164         View mNavBarTintView = new View(context);
165         FrameLayout.LayoutParams params = new FrameLayout.LayoutParams
166                 (FrameLayout.LayoutParams.MATCH_PARENT, getNavigationHeight(context));
167         params.gravity = Gravity.BOTTOM;
168         mNavBarTintView.setLayoutParams(params);
169         mNavBarTintView.setBackgroundColor(color);
170         return mNavBarTintView;
171     }
172 
173 
174     private boolean navigationBarExist(Activity activity) {
175         WindowManager windowManager = activity.getWindowManager();
176         Display d = windowManager.getDefaultDisplay();
177 
178         DisplayMetrics realDisplayMetrics = new DisplayMetrics();
179         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
180             d.getRealMetrics(realDisplayMetrics);
181         }
182 
183         int realHeight = realDisplayMetrics.heightPixels;
184         int realWidth = realDisplayMetrics.widthPixels;
185 
186         DisplayMetrics displayMetrics = new DisplayMetrics();
187         d.getMetrics(displayMetrics);
188 
189         int displayHeight = displayMetrics.heightPixels;
190         int displayWidth = displayMetrics.widthPixels;
191 
192         return (realWidth - displayWidth) > 0 || (realHeight - displayHeight) > 0;
193     }
194 
195 
196     @ColorInt
197     private int calculateColor(@ColorInt int color, int alpha) {
198         float a = 1 - alpha / 255f;
199         int red = color >> 16 & 0xff;
200         int green = color >> 8 & 0xff;
201         int blue = color & 0xff;
202         red = (int) (red * a + 0.5);
203         green = (int) (green * a + 0.5);
204         blue = (int) (blue * a + 0.5);
205         return 0xff << 24 | red << 16 | green << 8 | blue;
206     }
207 
208 
209     private void setRootView(Activity activity, boolean fit) {
210         ViewGroup parent = (ViewGroup) activity.findViewById(android.R.id.content);
211         for (int i = 0, count = parent.getChildCount(); i < count; i++) {
212             View childView = parent.getChildAt(i);
213             if (childView instanceof ViewGroup) {
214                 childView.setFitsSystemWindows(fit);
215                 ((ViewGroup) childView).setClipToPadding(fit);
216             }
217         }
218     }
219 
220 
221     private int getStatusBarHeight(Context context) {
222         int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
223         return context.getResources().getDimensionPixelSize(resourceId);
224     }
225 
226 
227     public int getNavigationHeight(Context context) {
228 
229         int resourceId = context.getResources().getIdentifier("navigation_bar_height", "dimen", "android");
230         return context.getResources().getDimensionPixelSize(resourceId);
231     }
232 }

要設置自定義顏色的狀態欄和導航欄只需要在 onCreate 方法中調用“setColorBar”方法,我們可以看到第一個方法里面傳入了兩個參數,第一個參數是自定義的顏色值,第二個參數是顏色深度值,最小為 0,最大為 255,當深度值為 0 時,狀態欄和導航欄的顏色就是第一個參數傳入的顏色值,即為第二個方法中的情況;當深度值不為 0 時,會根據深度值計算得到最終的顏色值,然后設置到狀態欄和導航欄上面。

正如大家所說,這里分別針對 Android 4.4 和 Android 5.0 以上做了不同處理,首先來看 Android 5.0 以上的情況,事實上 Android 5.0 以上的實現非常簡單,因為 Android 5.0 以上可以直接設置狀態欄和導航欄的顏色,所以只需要先得到最終的顏色值,然后調用 setStatusBarColor 和 setNavigationBarColor 方法進行設置就好了。然后 Android 4.4 稍微麻煩一點,首先必須要添加 FLAG_TRANSLUCENT_STATUS 這個 flag 來把狀態欄設置為透明,然后再在狀態欄上面添加一個 view 來保證狀態欄的顏色,然后再調用 navigationBarExist 方法來判斷當前手機是否存在導航欄,如果存在,對導航欄做同樣的處理,最后必須調用 setRootView 方法,其實這個方法是用來設置布局的子 view 的 fitsSystemWindows 參數的,相當於在布局中添加 android:fitsSystemWindows="true",如果不調用這個方法,就會導致布局中的內容覆蓋到狀態欄和導航欄上面了。

 

暫時就先寫到這里吧,后續繼續學習,一步步提高,程序員的生涯,無底洞!


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