Android沉浸式状态栏实现

苹果上的UI基本上都是这个效果，然而Android机上的顶部状态栏总是和app的主题颜色不搭。还好如今的api19以上的版本，我们也能做出这样的效果。

第一步：

 // 需要setContentView之前调用
 private void setTranslucentStatus() {
 if (Build.VERSION.SDK_INT >= Build.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);
         SystemStatusManager tintManager = new SystemStatusManager(this);
   tintManager.setStatusBarTintEnabled(true);
         // 设置状态栏的颜色
         tintManager.setStatusBarTintResource(R.color.theme_color);
   getWindow().getDecorView().setFitsSystemWindows(true);
 }
}

第二步：

为xml 的根布局添加android:fitsSystemWindows=”true” 属性

第三步：SystemStatusManager

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.Method;

@SuppressWarnings({ “unchecked”, “rawtypes” })
public class SystemStatusManager
{
static
{
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);
sNavBarOverride = (String) m.invoke(null, “qemu.hw.mainkeys”);
} catch (Throwable e) {
sNavBarOverride = null;
}
}
}

/**
* 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;

/**
* 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 SystemStatusManager(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 {
     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;
   }
 }

}
}