Java tutorial
/** * 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. */ package com.gosuncn.core.util.view; import android.annotation.TargetApi; import android.app.Activity; import android.content.Context; import android.graphics.Color; import android.os.Build; import android.support.v4.widget.DrawerLayout; import android.util.AttributeSet; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.view.WindowManager; import android.widget.LinearLayout; /** * ?? */ public class StatusBarUtils { private StatusBarUtils() { throw new UnsupportedOperationException("u can't instantiate me..."); } public static class StatusBarView extends View { public StatusBarView(Context context, AttributeSet attrs) { super(context, attrs); } public StatusBarView(Context context) { super(context); } } public static final int DEFAULT_STATUS_BAR_ALPHA = 112; /** * ?? * * @param activity ? activity * @param color ?? */ public static void setColor(Activity activity, int color) { setColor(activity, color, DEFAULT_STATUS_BAR_ALPHA); } /** * ?? * * @param activity ?activity * @param color ?? * @param statusBarAlpha ??? */ public static void setColor(Activity activity, int color, int statusBarAlpha) { 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(calculateStatusColor(color, statusBarAlpha)); } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS); ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView(); int count = decorView.getChildCount(); if (count > 0 && decorView.getChildAt(count - 1) instanceof StatusBarView) { decorView.getChildAt(count - 1).setBackgroundColor(calculateStatusColor(color, statusBarAlpha)); } else { StatusBarView statusView = createStatusBarView(activity, color, statusBarAlpha); decorView.addView(statusView); } setRootView(activity); } } /** * ??? * * @param activity ?activity * @param color ?? */ public static void setColorForSwipeBack(Activity activity, int color) { setColorForSwipeBack(activity, color, DEFAULT_STATUS_BAR_ALPHA); } /** * ??? * * @param activity ?activity * @param color ?? * @param statusBarAlpha ??? */ public static void setColorForSwipeBack(Activity activity, int color, int statusBarAlpha) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { ViewGroup contentView = ((ViewGroup) activity.findViewById(android.R.id.content)); contentView.setPadding(0, getStatusBarHeight(activity), 0, 0); contentView.setBackgroundColor(calculateStatusColor(color, statusBarAlpha)); setTransparentForWindow(activity); } } /** * ?? ??? * * @param activity ? activity * @param color ?? */ public static void setColorNoTranslucent(Activity activity, int color) { setColor(activity, color, 0); } /** * ???? * <p> * ?,??? * * @param activity ?activity */ public static void setTranslucent(Activity activity) { setTranslucent(activity, DEFAULT_STATUS_BAR_ALPHA); } /** * ???? * <p> * ?,??? * * @param activity ?activity * @param statusBarAlpha ??? */ public static void setTranslucent(Activity activity, int statusBarAlpha) { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) { return; } setTransparent(activity); addTranslucentView(activity, statusBarAlpha); } /** * CoordinatorLayout, ???? * <p> * ?,??? * * @param activity ?activity * @param statusBarAlpha ??? */ public static void setTranslucentForCoordinatorLayout(Activity activity, int statusBarAlpha) { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) { return; } transparentStatusBar(activity); addTranslucentView(activity, statusBarAlpha); } /** * ??? * * @param activity ?activity */ public static void setTransparent(Activity activity) { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) { return; } transparentStatusBar(activity); setRootView(activity); } /** * DrawerLayout ??? * * @param activity ?activity * @param drawerLayout DrawerLayout * @param color ?? */ public static void setColorForDrawerLayout(Activity activity, DrawerLayout drawerLayout, int color) { setColorForDrawerLayout(activity, drawerLayout, color, DEFAULT_STATUS_BAR_ALPHA); } /** * DrawerLayout ??, * * @param activity ?activity * @param drawerLayout DrawerLayout * @param color ?? */ public static void setColorNoTranslucentForDrawerLayout(Activity activity, DrawerLayout drawerLayout, int color) { setColorForDrawerLayout(activity, drawerLayout, color, 0); } /** * DrawerLayout ??? * * @param activity ?activity * @param drawerLayout DrawerLayout * @param color ?? * @param statusBarAlpha ??? */ public static void setColorForDrawerLayout(Activity activity, DrawerLayout drawerLayout, int color, 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); } // ???? // statusBarView ViewGroup contentLayout = (ViewGroup) drawerLayout.getChildAt(0); if (contentLayout.getChildCount() > 0 && contentLayout.getChildAt(0) instanceof StatusBarView) { contentLayout.getChildAt(0).setBackgroundColor(calculateStatusColor(color, statusBarAlpha)); } else { StatusBarView statusBarView = createStatusBarView(activity, color); contentLayout.addView(statusBarView, 0); } // ? LinearLayout ,padding top if (!(contentLayout instanceof LinearLayout) && contentLayout.getChildAt(1) != null) { contentLayout.getChildAt(1).setPadding(contentLayout.getPaddingLeft(), getStatusBarHeight(activity) + contentLayout.getPaddingTop(), contentLayout.getPaddingRight(), contentLayout.getPaddingBottom()); } // ViewGroup drawer = (ViewGroup) drawerLayout.getChildAt(1); drawerLayout.setFitsSystemWindows(false); contentLayout.setFitsSystemWindows(false); contentLayout.setClipToPadding(true); drawer.setFitsSystemWindows(false); addTranslucentView(activity, statusBarAlpha); } /** * DrawerLayout ??? * * @param activity ?activity * @param drawerLayout DrawerLayout */ public static void setTranslucentForDrawerLayout(Activity activity, DrawerLayout drawerLayout) { setTranslucentForDrawerLayout(activity, drawerLayout, DEFAULT_STATUS_BAR_ALPHA); } /** * DrawerLayout ??? * * @param activity ?activity * @param drawerLayout DrawerLayout */ public static void setTranslucentForDrawerLayout(Activity activity, DrawerLayout drawerLayout, int statusBarAlpha) { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) { return; } setTransparentForDrawerLayout(activity, drawerLayout); addTranslucentView(activity, statusBarAlpha); } /** * DrawerLayout ??? * * @param activity ?activity * @param drawerLayout DrawerLayout */ public static void setTransparentForDrawerLayout(Activity activity, DrawerLayout drawerLayout) { 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); // ? LinearLayout ,padding top if (!(contentLayout instanceof LinearLayout) && contentLayout.getChildAt(1) != null) { contentLayout.getChildAt(1).setPadding(0, getStatusBarHeight(activity), 0, 0); } // ViewGroup drawer = (ViewGroup) drawerLayout.getChildAt(1); drawerLayout.setFitsSystemWindows(false); contentLayout.setFitsSystemWindows(false); contentLayout.setClipToPadding(true); drawer.setFitsSystemWindows(false); } /** * ImageView ???? * * @param activity ?activity * @param needOffsetView ???? View */ public static void setTransparentForImageView(Activity activity, View needOffsetView) { setTranslucentForImageView(activity, 0, needOffsetView); } /** * ImageView ????(?) * * @param activity ?activity * @param needOffsetView ???? View */ public static void setTranslucentForImageView(Activity activity, View needOffsetView) { setTranslucentForImageView(activity, DEFAULT_STATUS_BAR_ALPHA, needOffsetView); } /** * ImageView ???? * * @param activity ?activity * @param statusBarAlpha ??? * @param needOffsetView ???? View */ public static void setTranslucentForImageView(Activity activity, int statusBarAlpha, View needOffsetView) { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) { return; } setTransparentForWindow(activity); addTranslucentView(activity, statusBarAlpha); if (needOffsetView != null) { ViewGroup.MarginLayoutParams layoutParams = (ViewGroup.MarginLayoutParams) needOffsetView .getLayoutParams(); layoutParams.setMargins(0, getStatusBarHeight(activity), 0, 0); } } /** * fragment ImageView ??? * * @param activity fragment activity * @param needOffsetView ???? View */ public static void setTranslucentForImageViewInFragment(Activity activity, View needOffsetView) { setTranslucentForImageViewInFragment(activity, DEFAULT_STATUS_BAR_ALPHA, needOffsetView); } /** * fragment ImageView ??? * * @param activity fragment activity * @param needOffsetView ???? View */ public static void setTransparentForImageViewInFragment(Activity activity, View needOffsetView) { setTranslucentForImageViewInFragment(activity, 0, needOffsetView); } /** * fragment ImageView ??? * * @param activity fragment activity * @param statusBarAlpha ??? * @param needOffsetView ???? View */ public static void setTranslucentForImageViewInFragment(Activity activity, int statusBarAlpha, View needOffsetView) { setTranslucentForImageView(activity, statusBarAlpha, needOffsetView); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) { clearPreviousSetting(activity); } } /////////////////////////////////////////////////////////////////////////////////// @TargetApi(Build.VERSION_CODES.KITKAT) private static void clearPreviousSetting(Activity activity) { ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView(); int count = decorView.getChildCount(); if (count > 0 && decorView.getChildAt(count - 1) instanceof StatusBarView) { decorView.removeViewAt(count - 1); ViewGroup rootView = (ViewGroup) ((ViewGroup) activity.findViewById(android.R.id.content)) .getChildAt(0); rootView.setPadding(0, 0, 0, 0); } } /** * ??? * * @param activity ? activity * @param statusBarAlpha ? */ private static void addTranslucentView(Activity activity, int statusBarAlpha) { ViewGroup contentView = (ViewGroup) activity.findViewById(android.R.id.content); if (contentView.getChildCount() > 1) { contentView.getChildAt(1).setBackgroundColor(Color.argb(statusBarAlpha, 0, 0, 0)); } else { contentView.addView(createTranslucentStatusBarView(activity, statusBarAlpha)); } } /** * ?????? * * @param activity ? activity * @param color ?? * @return ??? */ private static StatusBarView createStatusBarView(Activity activity, int color) { // ?? StatusBarView statusBarView = new StatusBarView(activity); LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, getStatusBarHeight(activity)); statusBarView.setLayoutParams(params); statusBarView.setBackgroundColor(color); return statusBarView; } /** * ???????? * * @param activity ?activity * @param color ?? * @param alpha ? * @return ??? */ private static StatusBarView createStatusBarView(Activity activity, int color, int alpha) { // ?? StatusBarView statusBarView = new StatusBarView(activity); LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, getStatusBarHeight(activity)); statusBarView.setLayoutParams(params); statusBarView.setBackgroundColor(calculateStatusColor(color, alpha)); return statusBarView; } /** * ? */ @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH) private static void setRootView(Activity activity) { ViewGroup rootView = (ViewGroup) ((ViewGroup) activity.findViewById(android.R.id.content)).getChildAt(0); rootView.setFitsSystemWindows(true); rootView.setClipToPadding(true); } /** * ? */ private static void setTransparentForWindow(Activity activity) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { activity.getWindow().setStatusBarColor(Color.TRANSPARENT); activity.getWindow().getDecorView().setSystemUiVisibility( View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN); } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { activity.getWindow().setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS); } } /** * ??? */ @TargetApi(Build.VERSION_CODES.KITKAT) private static void transparentStatusBar(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().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION); activity.getWindow().setStatusBarColor(Color.TRANSPARENT); } else { activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS); } } /** * ?? View * * @param alpha ? * @return ?? View */ private static StatusBarView createTranslucentStatusBarView(Activity activity, int alpha) { // ?? StatusBarView statusBarView = new StatusBarView(activity); LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, getStatusBarHeight(activity)); statusBarView.setLayoutParams(params); statusBarView.setBackgroundColor(Color.argb(alpha, 0, 0, 0)); return statusBarView; } /** * ??? * * @param context context * @return ?? */ public static int getStatusBarHeight(Context context) { int result = -1; int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android"); if (resourceId > 0) { result = context.getResources().getDimensionPixelSize(resourceId); } return result; } /** * ?? * * @param color color * @param alpha alpha * @return ?? */ private static int calculateStatusColor(int color, int alpha) { 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; } /** * ???? * <p>??setContentView??</p> * <p>Activity?AppCompatActivity</p> * <p>??????QQ?</p> * <p>?Activityandroid:theme="@android:style/Theme.NoTitleBar.Fullscreen"</p> * <p>?Activity?AppCompatActivity</p> * * @param activity activity */ public static void hideStatusBar(Activity activity) { activity.requestWindowFeature(Window.FEATURE_NO_TITLE); activity.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); } /** * ??? * * @param activity activity * @return {@code true}: <br>{@code false}: ? */ public static boolean isStatusBarExists(Activity activity) { WindowManager.LayoutParams params = activity.getWindow().getAttributes(); return (params.flags & WindowManager.LayoutParams.FLAG_FULLSCREEN) != WindowManager.LayoutParams.FLAG_FULLSCREEN; } }