5 个处理状态栏的函数

今天为大家介绍 5 个处理状态栏的函数，这 5 个函数互不依赖，可以自由以任意次序组合以达成自己的需求。支持到 Android 4.4 。

如图所示：

statusbar-screenshot

沉浸式

public static void setStatusBarTranslucent(Window window, boolean translucent) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        View decorView = window.getDecorView();
        if (translucent) {
            decorView.setOnApplyWindowInsetsListener(new View.OnApplyWindowInsetsListener() {
                @TargetApi(Build.VERSION_CODES.LOLLIPOP)
                @Override
                public WindowInsets onApplyWindowInsets(View v, WindowInsets insets) {
                    WindowInsets defaultInsets = v.onApplyWindowInsets(insets);
                    return defaultInsets.replaceSystemWindowInsets(
                            defaultInsets.getSystemWindowInsetLeft(),
                            0,
                            defaultInsets.getSystemWindowInsetRight(),
                            defaultInsets.getSystemWindowInsetBottom());
                }
            });
        } else {
            decorView.setOnApplyWindowInsetsListener(null);
        }
        ViewCompat.requestApplyInsets(decorView);
    } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        if (translucent) {
            window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        } else {
            window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        }
        ViewCompat.requestApplyInsets(window.getDecorView());
    }
}

状态栏着色

public static void setStatusBarColor(final Window window, int color, boolean animated) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
        if (animated) {
            int curColor = window.getStatusBarColor();
            ValueAnimator colorAnimation = ValueAnimator.ofObject(new ArgbEvaluator(), curColor, color);

            colorAnimation.addUpdateListener(
                    new ValueAnimator.AnimatorUpdateListener() {
                        @TargetApi(21)
                        @Override
                        public void onAnimationUpdate(ValueAnimator animator) {
                            window.setStatusBarColor((Integer) animator.getAnimatedValue());
                        }
                    });
            colorAnimation.setDuration(200).setStartDelay(0);
            colorAnimation.start();
        } else {
            window.setStatusBarColor(color);
        }
    } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        ViewGroup decorViewGroup = (ViewGroup) window.getDecorView();
        View statusBarView = decorViewGroup.findViewWithTag("custom_status_bar_tag");
        if (statusBarView == null) {
            statusBarView = new View(window.getContext());
            statusBarView.setTag("custom_status_bar_tag");
            FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(
                    FrameLayout.LayoutParams.MATCH_PARENT, getStatusBarHeight(window.getContext()));
            params.gravity = Gravity.TOP;
            statusBarView.setLayoutParams(params);
            decorViewGroup.addView(statusBarView);
        }

        if (animated) {
            Drawable drawable = statusBarView.getBackground();
            int curColor = Integer.MAX_VALUE;
            if (drawable != null && drawable instanceof ColorDrawable) {
                ColorDrawable colorDrawable = (ColorDrawable) drawable;
                curColor = colorDrawable.getColor();
            }
            if (curColor != Integer.MAX_VALUE) {
                final View barView = statusBarView;
                ValueAnimator colorAnimation = ValueAnimator.ofObject(new ArgbEvaluator(), curColor, color);
                colorAnimation.addUpdateListener(
                        new ValueAnimator.AnimatorUpdateListener() {
                            @Override
                            public void onAnimationUpdate(ValueAnimator animator) {
                                barView.setBackground(new ColorDrawable((Integer) animator.getAnimatedValue()));
                            }
                        });
                colorAnimation.setDuration(200).setStartDelay(0);
                colorAnimation.start();
            } else {
                statusBarView.setBackground(new ColorDrawable(color));
            }
        } else {
            statusBarView.setBackground(new ColorDrawable(color));
        }
    }
}

黑色状态栏

public static void setStatusBarStyle(Window window, boolean dark) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        View decorView = window.getDecorView();
        decorView.setSystemUiVisibility(
                dark ? View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR : 0);
    }
}

隐藏状态栏

public static void setStatusBarHidden(Window window, boolean hidden) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        if (hidden) {
            window.addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
            window.clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
        } else {
            window.addFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
            window.clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
        }
    }
    
    if (Build.VERSION.SDK_INT == Build.VERSION_CODES.KITKAT) {
        ViewGroup decorViewGroup = (ViewGroup) window.getDecorView();
        final View statusBarView = decorViewGroup.findViewWithTag("custom_status_bar_tag");

        if (statusBarView != null) {
            boolean hiding = statusBarView.isClickable();
            if (hiding == hidden) {
                return;
            }

            if (hidden) {
                statusBarView.setClickable(true);
                ObjectAnimator animator = ObjectAnimator.ofFloat(statusBarView, "y", -getStatusBarHeight(window.getContext()));
                animator.setDuration(200);
                animator.setStartDelay(200);
                animator.start();
            } else {
                statusBarView.setClickable(false);
                ObjectAnimator animator = ObjectAnimator.ofFloat(statusBarView, "y", 0);
                animator.setDuration(200);
                animator.start();
            }
        }
    }
}

调整 Toolbar 位置

public static void appendStatusBarPadding(View view, int viewHeight) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        if (view != null) {
            int statusBarHeight = getStatusBarHeight(view.getContext());
            view.setPadding(view.getPaddingLeft(), statusBarHeight, view.getPaddingRight(), view.getPaddingBottom());
            if (viewHeight > 0) {
                view.getLayoutParams().height = statusBarHeight + viewHeight;
            } else {
                view.getLayoutParams().height = viewHeight;
            }
        }
    }
}

public static void removeStatusBarPadding(View view, int viewHeight) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        if (view != null) {
            view.setPadding(view.getPaddingLeft(), 0, view.getPaddingRight(),
                    view.getPaddingBottom());
            view.getLayoutParams().height = viewHeight;
        }
    }
}

public static int getStatusBarHeight(Context context) {
    int statusBarHeight = -1;
    //获取status_bar_height资源的ID
    int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
    if (resourceId > 0) {
        //根据资源ID获取响应的尺寸值
        statusBarHeight = context.getResources().getDimensionPixelSize(resourceId);
    }
    return statusBarHeight;
}

在 Fragment 中使用

有时，一个 Activity 中有好几个 fragment, 每个 fragment 的状态栏样式可能都不一样，如何优雅地跟随 fragment 切换状态栏的样式呢？就像下图所示的那样？

statusbar.gif

要达成这样的效果需要作一定的封装，这里有一个封装好的方案，只需要有选择地重写下面几个方法，简单返回想要的效果即可。

protected BarStyle preferredStatusBarStyle();
protected boolean preferredStatusBarHidden();
protected int preferredStatusBarColor();
protected boolean preferredStatusBarColorAnimated();

源码在此