Android状态栏适配是一个老生常谈的问题,那么我又拿出来讲了,因为这个东西确实太重要了,基本上每个项目都用得到。状态栏总共有几种形态。第一,让状态栏颜色跟应用主色调一致,布局内容不占有状态栏的位置。第二,让布局内容的顶部成为状态栏的一部分,状态栏透明。第三,有DrawerLayout的情况,侧边栏滑出来,一半侧边栏的顶部界面,一半内容的顶部界面,且不透明。
让状态栏颜色跟应用主色调一致,布局内容不占有状态栏的位置
设置非全屏的状态栏颜色
/**
* 设置不全屏内容的状态栏颜色。
*
* @param activity 需要设置的activity
* @param statusBarColor 状态栏颜色值
* @param statusBarAlpha 状态栏透明度
*/
public static void setStatusBar(Activity activity, @ColorInt int statusBarColor, @IntRange(from = 0, to = 255) int statusBarAlpha) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
// >= 6.0 支持根据状态栏颜色定制浅色和深色的文字和图标
activity.getWindow().setStatusBarColor(statusBarColor);
int option;
if (isDarkColor(statusBarColor)) {
// 深色状态栏,则让状态栏文字和图标变白
option = View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
} else {
// 浅色状态栏,则让状态栏文字和图标变黑
option = View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_VISIBLE;
}
activity.getWindow().getDecorView().setSystemUiVisibility(option);
} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
// 5.x
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
activity.getWindow().setStatusBarColor(calculateColor(statusBarColor, statusBarAlpha));
} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
// 4.4 自己创建一个色块加到DecorView
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();
View doraStatusBarView = decorView.findViewById(DORA_STATUS_BAR_VIEW_ID);
if (doraStatusBarView != null) {
if (doraStatusBarView.getVisibility() == View.GONE) {
doraStatusBarView.setVisibility(View.VISIBLE);
}
doraStatusBarView.setBackgroundColor(calculateColor(statusBarColor, statusBarAlpha));
} else {
decorView.addView(createStatusBarView(activity, statusBarColor, statusBarAlpha));
}
setFitsSystemWindow(activity);
} else {
// < 4.4 不可定制,黑色状态栏,无解
}
}
检测状态栏的颜色,以确定用深色还是浅色的文字和图标
/**
* 状态栏是否是深色。
*
* @param color 状态栏颜色值
*/
public static boolean isDarkColor(@ColorInt int color) {
int gray = (int) (Color.red(color) * 0.299 + Color.green(color) * 0.587 + Color.blue(color) * 0.114);
return gray >= 192;
}
自己创建一个和状态栏一样高度的色块。
/**
* 生成一个和状态栏大小相同的矩形条。
*
* @param activity 需要设置的activity
* @param color 状态栏颜色值
* @param alpha 状态栏透明度
* @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(calculateColor(color, alpha));
statusBarView.setId(DORA_STATUS_BAR_VIEW_ID);
return statusBarView;
}
根布局设置fitsSystemWindow
private static void setFitsSystemWindow(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);
}
}
}
获取状态栏的高度
private static int getStatusBarHeight(Context context) {
int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
return context.getResources().getDimensionPixelSize(resourceId);
}
计算带透明度后的颜色
private static int calculateColor(@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;
}
让布局内容的顶部成为状态栏的一部分,状态栏透明
public static void setFullScreenStatusBar(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().setStatusBarColor(Color.TRANSPARENT);
} else {
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
}
activity.getWindow()
.getDecorView()
.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
}
DrawerLayout设置状态栏颜色
设置DrawerLayout的状态栏一半的颜色
public static void setStatusBar(Activity activity, DrawerLayout drawerLayout, @ColorInt int statusBarColor,
@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);
}
ViewGroup contentLayout = (ViewGroup) drawerLayout.getChildAt(0);
View doraStatusBarView = contentLayout.findViewById(DORA_STATUS_BAR_VIEW_ID);
if (doraStatusBarView != null) {
if (doraStatusBarView.getVisibility() == View.GONE) {
doraStatusBarView.setVisibility(View.VISIBLE);
}
doraStatusBarView.setBackgroundColor(statusBarColor);
} else {
contentLayout.addView(createStatusBarView(activity, statusBarColor), 0);
}
if (!(contentLayout instanceof LinearLayout) && contentLayout.getChildAt(1) != null) {
contentLayout.getChildAt(1)
.setPadding(contentLayout.getPaddingLeft(), getStatusBarHeight(activity) + contentLayout.getPaddingTop(),
contentLayout.getPaddingRight(), contentLayout.getPaddingBottom());
}
setFitsSystemWindow(drawerLayout, contentLayout);
addStatusBarView(activity, statusBarAlpha);
}
设置fitsSystemWindow
private static void setFitsSystemWindow(DrawerLayout drawerLayout, ViewGroup drawerLayoutContentLayout) {
ViewGroup drawer = (ViewGroup) drawerLayout.getChildAt(1);
drawerLayout.setFitsSystemWindows(false);
drawerLayoutContentLayout.setFitsSystemWindows(false);
drawerLayoutContentLayout.setClipToPadding(true);
drawer.setFitsSystemWindows(false);
}
添加状态栏View
/**
* 添加半透明矩形条。
*
* @param activity 需要设置的 activity
* @param statusBarAlpha 状态栏透明度
*/
private static void addStatusBarView(Activity activity, @IntRange(from = 0, to = 255) int statusBarAlpha) {
ViewGroup contentView = (ViewGroup) activity.findViewById(android.R.id.content);
View doraStatusBarView = contentView.findViewById(DORA_STATUS_BAR_VIEW_ID);
if (doraStatusBarView != null) {
if (doraStatusBarView.getVisibility() == View.GONE) {
doraStatusBarView.setVisibility(View.VISIBLE);
}
doraStatusBarView.setBackgroundColor(Color.argb(statusBarAlpha, 0, 0, 0));
} else {
contentView.addView(createTranslucentStatusBarView(activity, statusBarAlpha));
}
}