给状态栏设置渐变颜色

1 状态栏设置纯颜色，很方便，直接获取状态栏，设置颜色即可代码：if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {Window window = ((Activity)context).getWindow();window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);//window.setStatusBarColor(context.getResources().getColor(colorId)); //纯颜色设置//底部导航栏//window.setNavigationBarColor(context.getResources().getColor(R.color.titlecolor));}2 那想让状态栏是渐变色该怎么处理呢？这又分两种情况了，一种是继承传统的 Activity ,一种是继承 AppCompatActivity。（1） 继承 Activity ，这种方式，谷歌没有提供给状态栏设置drawable 的方法，所以，只能利用反射去设置View statusBarView ;public void setStatuesBg(){ if (statusBarView == null) {            int identifier = getResources().getIdentifier("statusBarBackground", "id", "android");            statusBarView = getWindow().findViewById(identifier);        }        if (statusBarView != null) {            statusBarView.setBackgroundResource(R.drawable.topcolor_grient);            isset = true;//            isStatusBar(true);        }        }topcolor_grient：  这个就是自己设置的的渐变背景<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">    <gradient        android:angle="180"        android:endColor="@color/color_2196"        android:startColor="@color/color_1655" /></shape>（2） 如果是继承AppCompatActivity，那就好处理了，原理就是把状态栏设为透明色，然后把布局订到状态栏下面，ok，这时候需要注意的就是调整布局和状态栏的距离了。代码：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);        }    }      /**     * 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 = (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));        }    } 总结：文章编辑的有点乱，稍后会有demo，如果这段时间有人需要的话，留下邮箱，我给你们发过去。