QQ实现了沉浸状态栏的效果，如图：
如图，好多应用如金山词霸等也实现了这样的效果。这样的效果很酷炫，其实设置很简单。
不过要说明的是，这种效果只能在API19以及以上版本中才能够做到。
如果想让界面Activity中实现这种效果，代码如下：
if(VERSION.SDK_INT >= VERSION_CODES.KITKAT) {
//透明状态栏
getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
//透明导航栏
getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
}VERSION_CODES.KITKAT就是API19的名称，只有手机系统版本大于19，才执行判断中的代码，才能显示沉浸状态栏的效果。
同时，这几句代码要写在setContentView(R.layout.XX);方法之前执行。
以上代码复制到Activity中执行效果如图：
这个界面的布局如下：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#6699CC"
android:gravity="center" >
<EditText
android:id="@+id/id_edt_username"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="输入账号"
android:layout_margin="10dp" />
<EditText
android:id="@+id/id_edt_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="输入密码"
android:layout_margin="10dp" />
<Button
android:id="@+id/id_btn_login"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="登录"
android:layout_margin="10dp" />
</LinearLayout>由于根节点中LinearLayout设置了背景颜色6699CC，所以上面的状态栏中设置成了6699CC这个颜色。
大家会问，上面有个标题栏，怎么去掉？很简单，使用requestWindowFeature(Window.FEATURE_NO_TITLE);就可以了，也是在setContentView(R.layout.XX);方法之前执行。
效果图：
这样是不是达到了整个界面同意的颜色的效果了。
上面的设置方法只是让一个Activity设置成沉浸状态栏的效果，如果想让整个应用中都想沉浸状态栏的效果，如何设置呢？有！！！确实有方法！！
如图所示，在res目录下面新建一个values-v19文件夹，下面新建一个styles.xml文件，内容如下：
<resources>
<!--
Base application theme for API 19+.
-->
<style name="AppBaseTheme" parent="android:Theme.Holo.Light.DarkActionBar">
<!-- API 14 theme customizations can go here. -->
<item name="android:windowTranslucentStatus">true</item>
<item name="android:windowTranslucentNavigation">true</item>
</style>
</resources>这样安卓系统会根据这个目录中的配置，自动进行设置，自动会加载这个目录下边的设置。
这样设置之后，代码中的判断语句就不需要了。运行之后，你会发现整个应用的界面都会是沉浸状态栏的形式了。
可能细心的人，可能发现了，经过上面的设置，状态栏中的字体和应用中的顶部挨得太近了。如图：
上面图中箭头部分，靠的太近了，这个该怎么设置呢？
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipToPadding="true"
android:fitsSystemWindows="true" >
............
............在该activity的布局文件中根元素下设置：
android:clipToPadding=”true”
android:fitsSystemWindows=”true”
就可以了。
效果图：
设置之后，间距是不是达到了我们想要的距离了，是正常的距离。
但是新问题出现了，状态栏颜色成了系统默认的颜色背景了。如何设置呢？简单！！！只要把上面的
android:clipToPadding=”true”
android:fitsSystemWindows=”true”
这两句代码放在布局文件的根元素的第一个元素下面就可以了。例如我的上面的界面的根元素是RelativeLayout，他的第一个元素是标题栏，一个返回按钮 ，一个图片按钮，可以把上面的两句代码放在标题栏的布局中，例如：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<RelativeLayout
android:id="@+id/noticelist_title_rl"
style="@style/Title_Bar"
android:layout_height="60dp"
android:background="#FF09D7E5"
<!--重点是这两句-->
android:clipToPadding="true"
android:fitsSystemWindows="true" >
<ImageView
android:id="@+id/noticelist_back_icon"
style="@style/Title_BackBtn"
android:contentDescription="@string/app_name" />
<TextView
android:id="@+id/noticelist_back_text"
style="@style/Title_BackTx"
android:layout_toRightOf="@id/noticelist_back_icon"/>
............
............这样设置之后，效果图：
正常了些。整个背景都是想要的了。
至于如何设置状态栏中的字体颜色，从开源中国论坛中看到了一个牛人的代码，现在粘贴在此，我还没看明白，目测是从android源码的角度来写的，废话不多说，代码如下；
public class SystemBarTintManager {
/**
* The default system bar tint color value.
*/
public static final int DEFAULT_TINT_COLOR = 0x99000000;
private final SystemBarConfig mConfig;
private boolean mStatusBarAvailable;
private boolean mNavBarAvailable;
private boolean mStatusBarTintEnabled;
private boolean mNavBarTintEnabled;
private View mStatusBarTintView;
private View mNavBarTintView;
private static boolean sIsMiuiV6;
private static String sNavBarOverride = null;
static {
Method methodGetter = null;
try {
Class<?> sysClass = Class.forName("android.os.SystemProperties");
methodGetter = sysClass.getDeclaredMethod("get", String.class);
sIsMiuiV6 = "V6".equals((String) methodGetter.invoke(sysClass, "ro.miui.ui.version.name"));
} catch (Exception e) {
e.printStackTrace();
}finally{
if(methodGetter!=null)
{
try {
sNavBarOverride = (String) methodGetter.invoke(null, "qemu.hw.mainkeys");
} catch (Exception e) {
e.printStackTrace();
sNavBarOverride = null;
}
}
}
}
/**
* @param activity The host activity.
*/
@TargetApi(19)
public SystemBarTintManager(Activity activity) {
Window win = activity.getWindow();
ViewGroup decorViewGroup = (ViewGroup) win.getDecorView();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
// check theme attrs
int[] attrs = {android.R.attr.windowTranslucentStatus,android.R.attr.windowTranslucentNavigation};
TypedArray a = activity.obtainStyledAttributes(attrs);
try {
mStatusBarAvailable = a.getBoolean(0, false);
mNavBarAvailable = a.getBoolean(1, false);
} finally {
a.recycle();
}
// check window flags
WindowManager.LayoutParams winParams = win.getAttributes();
int bits = WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;
if ((winParams.flags & bits) != 0) {
mStatusBarAvailable = true;
}
bits = WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION;
if ((winParams.flags & bits) != 0) {
mNavBarAvailable = true;
}
}
mConfig = new SystemBarConfig(activity, mStatusBarAvailable, mNavBarAvailable);
// device might not have virtual navigation keys
if (!mConfig.hasNavigtionBar()) {
mNavBarAvailable = false;
}
if (mStatusBarAvailable) {
setupStatusBarView(activity, decorViewGroup);
}
if (mNavBarAvailable) {
setupNavBarView(activity, decorViewGroup);
}
}
/**
* Enable tinting of the system status bar.
*
* @param enabled True to enable tinting, false to disable it (default).
*/
public void setStatusBarTintEnabled(boolean enabled) {
mStatusBarTintEnabled = enabled;
if (mStatusBarAvailable) {
mStatusBarTintView.setVisibility(enabled ? View.VISIBLE : View.GONE);
}
}
/**
* set status bar darkmode
* @param darkmode
* @param activity
*/
public void setStatusBarDarkMode(boolean darkmode, Activity activity) {
if (sIsMiuiV6) {
Class<? extends Window> clazz = activity.getWindow().getClass();
try {
int darkModeFlag = 0;
Class<?> layoutParams = Class.forName("android.view.MiuiWindowManager$LayoutParams");
Field field = layoutParams.getField("EXTRA_FLAG_STATUS_BAR_DARK_MODE");
darkModeFlag = field.getInt(layoutParams);
Method extraFlagField = clazz.getMethod("setExtraFlags", int.class, int.class);
extraFlagField.invoke(activity.getWindow(), darkmode ? darkModeFlag : 0, darkModeFlag);
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* Enable tinting of the system navigation bar.
* @param enabled True to enable tinting, false to disable it (default).
*/
public void setNavigationBarTintEnabled(boolean enabled) {
mNavBarTintEnabled = enabled;
if (mNavBarAvailable) {
mNavBarTintView.setVisibility(enabled ? View.VISIBLE : View.GONE);
}
}
/**
* Apply the specified color tint to all system UI bars.
* @param color The color of the background tint.
*/
public void setTintColor(int color) {
setStatusBarTintColor(color);
setNavigationBarTintColor(color);
}
/**
* Apply the specified drawable or color resource to all system UI bars.
* @param res The identifier of the resource.
*/
public void setTintResource(int res) {
setStatusBarTintResource(res);
setNavigationBarTintResource(res);
}
/**
* Apply the specified drawable to all system UI bars.
* @param drawable The drawable to use as the background, or null to remove it.
*/
public void setTintDrawable(Drawable drawable) {
setStatusBarTintDrawable(drawable);
setNavigationBarTintDrawable(drawable);
}
/**
* Apply the specified alpha to all system UI bars.
* @param alpha The alpha to use
*/
public void setTintAlpha(float alpha) {
setStatusBarAlpha(alpha);
setNavigationBarAlpha(alpha);
}
/**
* Apply the specified color tint to the system status bar.
* @param color The color of the background tint.
*/
public void setStatusBarTintColor(int color) {
if (mStatusBarAvailable) {
mStatusBarTintView.setBackgroundColor(color);
}
}
/**
* Apply the specified drawable or color resource to the system status bar.
* @param res The identifier of the resource.
*/
public void setStatusBarTintResource(int res) {
if (mStatusBarAvailable) {
mStatusBarTintView.setBackgroundResource(res);
}
}
/**
* Apply the specified drawable to the system status bar.
* @param drawable The drawable to use as the background, or null to remove it.
*/
@SuppressWarnings("deprecation")
public void setStatusBarTintDrawable(Drawable drawable) {
if (mStatusBarAvailable) {
mStatusBarTintView.setBackgroundDrawable(drawable);
}
}
/**
* Apply the specified alpha to the system status bar.
*
* @param alpha The alpha to use
*/
@TargetApi(11)
public void setStatusBarAlpha(float alpha) {
if (mStatusBarAvailable && Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
mStatusBarTintView.setAlpha(alpha);
}
}
/**
* Apply the specified color tint to the system navigation bar.
*
* @param color The color of the background tint.
*/
public void setNavigationBarTintColor(int color) {
if (mNavBarAvailable) {
mNavBarTintView.setBackgroundColor(color);
}
}
/**
* Apply the specified drawable or color resource to the system navigation bar.
*
* @param res The identifier of the resource.
*/
public void setNavigationBarTintResource(int res) {
if (mNavBarAvailable) {
mNavBarTintView.setBackgroundResource(res);
}
}
/**
* Apply the specified drawable to the system navigation bar.
*
* @param drawable The drawable to use as the background, or null to remove it.
*/
@SuppressWarnings("deprecation")
public void setNavigationBarTintDrawable(Drawable drawable) {
if (mNavBarAvailable) {
mNavBarTintView.setBackgroundDrawable(drawable);
}
}
/**
* Apply the specified alpha to the system navigation bar.
*
* @param alpha The alpha to use
*/
@TargetApi(11)
public void setNavigationBarAlpha(float alpha) {
if (mNavBarAvailable && Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
mNavBarTintView.setAlpha(alpha);
}
}
/**
* Get the system bar configuration.
* @return The system bar configuration for the current device configuration.
*/
public SystemBarConfig getConfig() {
return mConfig;
}
/**
* Is tinting enabled for the system status bar?
* @return True if enabled, False otherwise.
*/
public boolean isStatusBarTintEnabled() {
return mStatusBarTintEnabled;
}
/**
* Is tinting enabled for the system navigation bar?
* @return True if enabled, False otherwise.
*/
public boolean isNavBarTintEnabled() {
return mNavBarTintEnabled;
}
private void setupStatusBarView(Context context, ViewGroup decorViewGroup) {
mStatusBarTintView = new View(context);
LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, mConfig.getStatusBarHeight());
params.gravity = Gravity.TOP;
if (mNavBarAvailable && !mConfig.isNavigationAtBottom()) {
params.rightMargin = mConfig.getNavigationBarWidth();
}
mStatusBarTintView.setLayoutParams(params);
mStatusBarTintView.setBackgroundColor(DEFAULT_TINT_COLOR);
mStatusBarTintView.setVisibility(View.GONE);
decorViewGroup.addView(mStatusBarTintView);
}
private void setupNavBarView(Context context, ViewGroup decorViewGroup) {
mNavBarTintView = new View(context);
LayoutParams params;
if (mConfig.isNavigationAtBottom()) {
params = new LayoutParams(LayoutParams.MATCH_PARENT, mConfig.getNavigationBarHeight());
params.gravity = Gravity.BOTTOM;
} else {
params = new LayoutParams(mConfig.getNavigationBarWidth(), LayoutParams.MATCH_PARENT);
params.gravity = Gravity.RIGHT;
}
mNavBarTintView.setLayoutParams(params);
mNavBarTintView.setBackgroundColor(DEFAULT_TINT_COLOR);
mNavBarTintView.setVisibility(View.GONE);
decorViewGroup.addView(mNavBarTintView);
}
/**
* Class which describes system bar sizing and other characteristics for the current
* device configuration.
*
*/
public static class SystemBarConfig {
private static final String STATUS_BAR_HEIGHT_RES_NAME = "status_bar_height";
private static final String NAV_BAR_HEIGHT_RES_NAME = "navigation_bar_height";
private static final String NAV_BAR_HEIGHT_LANDSCAPE_RES_NAME = "navigation_bar_height_landscape";
private static final String NAV_BAR_WIDTH_RES_NAME = "navigation_bar_width";
private static final String SHOW_NAV_BAR_RES_NAME = "config_showNavigationBar";
private final boolean mTranslucentStatusBar;
private final boolean mTranslucentNavBar;
private final int mStatusBarHeight;
private final int mActionBarHeight;
private final boolean mHasNavigationBar;
private final int mNavigationBarHeight;
private final int mNavigationBarWidth;
private final boolean mInPortrait;
private final float mSmallestWidthDp;
private SystemBarConfig(Activity activity, boolean translucentStatusBar, boolean traslucentNavBar) {
Resources res = activity.getResources();
mInPortrait = (res.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT);
mSmallestWidthDp = getSmallestWidthDp(activity);
mStatusBarHeight = getInternalDimensionSize(res, STATUS_BAR_HEIGHT_RES_NAME);
mActionBarHeight = getActionBarHeight(activity);
mNavigationBarHeight = getNavigationBarHeight(activity);
mNavigationBarWidth = getNavigationBarWidth(activity);
mHasNavigationBar = (mNavigationBarHeight > 0);
mTranslucentStatusBar = translucentStatusBar;
mTranslucentNavBar = traslucentNavBar;
}
@TargetApi(14)
private int getActionBarHeight(Context context) {
int result = 0;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
TypedValue tv = new TypedValue();
context.getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true);
result = context.getResources().getDimensionPixelSize(tv.resourceId);
}
return result;
}
@TargetApi(14)
private int getNavigationBarHeight(Context context) {
Resources res = context.getResources();
int result = 0;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
if (!hasNavBar(context)) {
String key;
if (mInPortrait) {
key = NAV_BAR_HEIGHT_RES_NAME;
} else {
key = NAV_BAR_HEIGHT_LANDSCAPE_RES_NAME;
}
return getInternalDimensionSize(res, key);
}
}
return result;
}
@TargetApi(14)
private int getNavigationBarWidth(Context context) {
Resources res = context.getResources();
int result = 0;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
if (!hasNavBar(context))
{
return getInternalDimensionSize(res, NAV_BAR_WIDTH_RES_NAME);
}
}
return result;
}
private int getInternalDimensionSize(Resources res, String key) {
int result = 0;
int resourceId = res.getIdentifier(key, "dimen", "android");
if (resourceId > 0) {
result = res.getDimensionPixelSize(resourceId);
}
return result;
}
@SuppressLint("NewApi")
private float getSmallestWidthDp(Activity activity) {
DisplayMetrics metrics = new DisplayMetrics();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
activity.getWindowManager().getDefaultDisplay().getRealMetrics(metrics);
} else {
// TODO this is not correct, but we don't really care pre-kitkat
activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
}
float widthDp = metrics.widthPixels / metrics.density;
float heightDp = metrics.heightPixels / metrics.density;
return Math.min(widthDp, heightDp);
}
/**
* Should a navigation bar appear at the bottom of the screen in the current
* device configuration? A navigation bar may appear on the right side of
* the screen in certain configurations.
*
* @return True if navigation should appear at the bottom of the screen, False otherwise.
*/
public boolean isNavigationAtBottom() {
return (mSmallestWidthDp >= 600 || mInPortrait);
}
/**
* Get the height of the system status bar.
*
* @return The height of the status bar (in pixels).
*/
public int getStatusBarHeight() {
return mStatusBarHeight;
}
/**
* Get the height of the action bar.
*
* @return The height of the action bar (in pixels).
*/
public int getActionBarHeight() {
return mActionBarHeight;
}
/**
* Does this device have a system navigation bar?
*
* @return True if this device uses soft key navigation, False otherwise.
*/
public boolean hasNavigtionBar() {
return mHasNavigationBar;
}
/**
* Get the height of the system navigation bar.
*
* @return The height of the navigation bar (in pixels). If the device does not have
* soft navigation keys, this will always return 0.
*/
public int getNavigationBarHeight() {
return mNavigationBarHeight;
}
/**
* Get the width of the system navigation bar when it is placed vertically on the screen.
*
* @return The width of the navigation bar (in pixels). If the device does not have
* soft navigation keys, this will always return 0.
*/
public int getNavigationBarWidth() {
return mNavigationBarWidth;
}
/**
* Get the layout inset for any system UI that appears at the top of the screen.
*
* @param withActionBar True to include the height of the action bar, False otherwise.
* @return The layout inset (in pixels).
*/
public int getPixelInsetTop(boolean withActionBar) {
return (mTranslucentStatusBar ? mStatusBarHeight : 0) + (withActionBar ? mActionBarHeight : 0);
}
/**
* Get the layout inset for any system UI that appears at the bottom of the screen.
*
* @return The layout inset (in pixels).
*/
public int getPixelInsetBottom() {
if (mTranslucentNavBar && isNavigationAtBottom()) {
return mNavigationBarHeight;
} else {
return 0;
}
}
/**
* Get the layout inset for any system UI that appears at the right of the screen.
*
* @return The layout inset (in pixels).
*/
public int getPixelInsetRight() {
if (mTranslucentNavBar && !isNavigationAtBottom()) {
return mNavigationBarWidth;
} else {
return 0;
}
}
private boolean hasNavBar(Context context) {
Resources res = context.getResources();
int resourceId = res.getIdentifier(SHOW_NAV_BAR_RES_NAME, "bool", "android");
if (resourceId != 0) {
boolean hasNav = res.getBoolean(resourceId);
// check override flag (see static block)
if ("1".equals(sNavBarOverride)) {
hasNav = false;
} else if ("0".equals(sNavBarOverride)) {
hasNav = true;
}
return hasNav;
} else { // fallback
return !hasPermanentMenuKey(context);
}
}
private boolean hasPermanentMenuKey(Context cxt) {
try {
WindowManager wm = (WindowManager) cxt.getSystemService(Context.WINDOW_SERVICE);
ViewConfiguration config = ViewConfiguration.get(cxt);
Field menuKeyField = ViewConfiguration.class
.getDeclaredField("sHasPermanentMenuKey");
if (menuKeyField != null) {
menuKeyField.setAccessible(true);
return menuKeyField.getBoolean(config);
}
} catch (Exception e) {
e.printStackTrace();
}
return false;
}
}
}该工具类用法如下：
@Override
protected void onCreate(Bundle arg0) {
super.onCreate(arg0);
windowAttributes = getWindow().getAttributes();
activity = this;
mInflater = LayoutInflater.from(activity);
globalUtils = GlobalUtils.shareInstance();
screenMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(screenMetrics);
globalUtils = GlobalUtils.shareInstance();
userManager = UserManager.sharedInstance();
initHttpUtils();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
//状态栏透明 需要在创建SystemBarTintManager 之前调用。
setTranslucentStatus(true);
}
SystemBarTintManager tintManager = new SystemBarTintManager(this);
tintManager.setStatusBarTintEnabled(true);
//使StatusBarTintView 和 actionbar的颜色保持一致，风格统一。
tintManager.setStatusBarTintResource(R.color.white);
// 设置状态栏的文字颜色
tintManager.setStatusBarDarkMode(true, this);
}
@TargetApi(19)
private void setTranslucentStatus(boolean on) {
Window win = getWindow();
WindowManager.LayoutParams winParams = win.getAttributes();
final int bits = WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;
if (on) {
winParams.flags |= bits;
} else {
winParams.flags &= ~bits;
}
win.setAttributes(winParams);
}最后要注意：状态栏透明可能导致布局向上便宜，所以需要设置根布局的android:fitsSystemWindows=”true”
该工具类用了一下，还可以，效果非常好。
上面可以设置状态栏和标题栏的字体颜色和背景颜色，方法有多种。状态栏字体颜色好像V6有两种，一个白色，一种黑色，不设置黑色的话，默认就是白色。但是本人水平有限，还没有看懂作者的代码的大部分意思，以后看懂之后在进行补充。
以上代码，亲测有效！大家如果用的时候有什么问题，可以留言或评论，我看到会及时回复的。【握手~~~】
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