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(); 
   } 
  } 
 } 

 /* 
 * Copyright (C) 2013 readyState Software Ltd 
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at 
 * 
 * http://www.apache.org/licenses/LICENSE-2.0 
 * 
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
 * See the License for the specific language governing permissions and 
 * limitations under the License. 
 */ 
 import android.annotation.SuppressLint; 
 import android.annotation.TargetApi; 
 import android.app.Activity; 
 import android.content.Context; 
 import android.content.res.Configuration; 
 import android.content.res.Resources; 
 import android.content.res.TypedArray; 
 import android.graphics.drawable.Drawable; 
 import android.os.Build; 
 import android.util.DisplayMetrics; 
 import android.util.TypedValue; 
 import android.view.Gravity; 
 import android.view.View; 
 import android.view.ViewConfiguration; 
 import android.view.ViewGroup; 
 import android.view.Window; 
 import android.view.WindowManager; 
 import android.widget.FrameLayout.LayoutParams; 
 import java.lang.reflect.Field; 
 import java.lang.reflect.Method; 
 /** 
 * Class to manage status and navigation bar tint effects when using KitKat 
 * translucent system UI modes. 
 * 
 */ 
 public class SystemBarTintManager { 
 /** 
  * The default system bar tint color value. 
  */ 
 public static final int DEFAULT_TINT_COLOR = 0x99000000; 
 private static String sNavBarOverride; 
 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; 
 static { 
  // Android allows a system property to override the presence of the navigation bar. 
  // Used by the emulator. 
  // See https://github.com/android/platform_frameworks_base/blob/master/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java#L1076 
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { 
  try { 
   Class c = Class.forName("android.os.SystemProperties"); 
   Method m = c.getDeclaredMethod("get", String.class); 
   m.setAccessible(true); 
   sIsMiuiV6 = "V6".equals((String) m.invoke(c, "ro.miui.ui.version.name")); 
   sNavBarOverride = (String) m.invoke(null, "qemu.hw.mainkeys"); 
  } catch (Throwable e) { 
   sNavBarOverride = null; 
  } 
  } 
 } 
 /** 
  * Constructor. Call this in the host activity onCreate method after its 
  * content view has been set. You should always create new instances when 
  * the host activity is recreated. 
  * 
  * @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. 
  * 
  * If the platform is running Jelly Bean or earlier, or translucent system 
  * UI modes have not been enabled in either the theme or via window flags, 
  * then this method does nothing. 
  * 
  * @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); 
  } 
 } 
 /** 
  * Enable tinting of the system navigation bar. 
  * 
  * If the platform does not have soft navigation keys, is running Jelly Bean 
  * or earlier, or translucent system UI modes have not been enabled in either 
  * the theme or via window flags, then this method does nothing. 
  * 
  * @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 = TypedValue.complexToDimensionPixelSize(tv.data, context.getResources().getDisplayMetrics()); 
  } 
  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; 
  } 
  @TargetApi(14) 
  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 !ViewConfiguration.get(context).hasPermanentMenuKey(); 
  } 
  } 
  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; 
  } 
  } 
 } 
 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(); 
   } 
  } 
 } 
 } 

 public void initSystemBar(){ 
  if (VERSION.SDK_INT >= VERSION_CODES.KITKAT) { 
  getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS); 
  getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION); 
  getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS); 
  fwRootLayout.setFitsSystemWindows(true);//需要把根布局设置为这个属性 子布局则不会占用状态栏位置 
  fwRootLayout.setClipToPadding(true);//需要把根布局设置为这个属性 子布局则不会占用状态栏位置 
  } 
  tintManager = new SystemBarTintManager(this);// 创建状态栏的管理实例 
  tintManager.setStatusBarTintEnabled(true);// 激活状态栏设置 
  tintManager.setNavigationBarTintEnabled(true);// 激活导航栏设置 
  tintManager.setStatusBarTintColor(getResources().getColor(R.color.blue500));//设置状态栏颜色 
  tintManager.setStatusBarDarkMode(false, this);//false 状态栏字体颜色是白色 true 颜色是黑色 
 }