设置透明状态栏

SystemBarTintManager.java



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;
public class SystemBarTintManager {

	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);
				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 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;
			 }
		 }

	 }

}

/**
	 * 初始化状态栏
	 */
	private void initSystemBarTint() {
		if (translucentStatusBar()) {
			//设置状态栏全透明
			if(Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP){
				getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
				getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
				getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
				getWindow().setStatusBarColor(Color.TRANSPARENT);
			}else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
				getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
			}
		}
// 沉浸式状态栏
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
			//5.0以上使用原生方法
			getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
			getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
			getWindow().setStatusBarColor(setStatusBarColor());
		} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
			//4.4-5.0使用三方工具类，有些4.4的手机有问题，这里为演示方便，不使用沉浸式
			//getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
			SystemBarTintManager tintManager = new SystemBarTintManager(this);
			tintManager.setStatusBarTintEnabled(true);
			tintManager.setStatusBarTintColor(setStatusBarColor());
		}
	}

/** 子类可以重写改变状态栏颜色 */
	protected int setStatusBarColor() {
		return getColorPrimary();
	}

	/** 子类可以重写决定是否使用透明状态栏 */
	protected boolean translucentStatusBar() {
		return false;
	}