Android开发 二维码扫描，识别相册图片二维码

package com.example.saomademo.utils; import android.annotation.SuppressLint; import android.annotation.TargetApi; import android.app.Activity; import android.graphics.Color; import android.os.Build; import android.util.TypedValue; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.view.WindowManager; import android.widget.FrameLayout; import android.widget.Toolbar; import androidx.coordinatorlayout.widget.CoordinatorLayout; import com.example.saomademo.R; import com.google.android.material.appbar.AppBarLayout; import com.google.android.material.appbar.CollapsingToolbarLayout; import java.lang.reflect.Field; import static com.example.saomademo.utils.StatusBarUtils.getStatusBarHeight; /** * <pre> * @author yangchong * blog : https://github.com/yangchong211/YCStatusBar * time : 2018/06/4 * desc : 状态栏工具类 * revise: 使用方法请看GitHub说明文档 * </pre> */ @TargetApi(Build.VERSION_CODES.KITKAT) final class BarStatusKitKat { private static final String TAG_FAKE_STATUS_BAR_VIEW = "statusBarView"; private static final String TAG_MARGIN_ADDED = "marginAdded"; static void setStatusBarColor(Activity activity, int statusColor) { Window window = activity.getWindow(); //设置Window为全透明 window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS); ViewGroup mContentView = (ViewGroup) window.findViewById(Window.ID_ANDROID_CONTENT); //获取父布局 View mContentChild = mContentView.getChildAt(0); //获取状态栏高度 int statusBarHeight = getStatusBarHeight(activity); //如果已经存在假状态栏则移除，防止重复添加 removeFakeStatusBarViewIfExist(activity); //添加一个View来作为状态栏的填充 addFakeStatusBarView(activity, statusColor, statusBarHeight); //设置子控件到状态栏的间距 addMarginTopToContentChild(mContentChild, statusBarHeight); //不预留系统栏位置 if (mContentChild != null) { mContentChild.setFitsSystemWindows(false); } //如果在Activity中使用了ActionBar则需要再将布局与状态栏的高度跳高一个ActionBar的高度，否则内容会被ActionBar遮挡 int actionBarId = activity.getResources().getIdentifier("action_bar", "id", activity.getPackageName()); View view = activity.findViewById(actionBarId); if (view != null) { TypedValue typedValue = new TypedValue(); if (activity.getTheme().resolveAttribute(R.attr.actionBarSize, typedValue, true)) { int actionBarHeight = TypedValue.complexToDimensionPixelSize(typedValue.data, activity.getResources().getDisplayMetrics()); StateAppBar.setContentTopPadding(activity, actionBarHeight); } } } static void translucentStatusBar(Activity activity) { Window window = activity.getWindow(); //设置Window为透明 window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS); ViewGroup mContentView = (ViewGroup) activity.findViewById(Window.ID_ANDROID_CONTENT); View mContentChild = mContentView.getChildAt(0); //移除已经存在假状态栏则,并且取消它的Margin间距 removeFakeStatusBarViewIfExist(activity); removeMarginTopOfContentChild(mContentChild, getStatusBarHeight(activity)); if (mContentChild != null) { //fitsSystemWindow 为 false, 不预留系统栏位置. mContentChild.setFitsSystemWindows(false); } } static void setStatusBarColorForCollapsingToolbar(final Activity activity, final AppBarLayout appBarLayout, final CollapsingToolbarLayout collapsingToolbarLayout, Toolbar toolbar, int statusColor) { Window window = activity.getWindow(); //设置Window为全透明 window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS); ViewGroup mContentView = (ViewGroup) window.findViewById(Window.ID_ANDROID_CONTENT); //AppBarLayout,CollapsingToolbarLayout,ToolBar,ImageView的fitsSystemWindow统一改为false, 不预留系统栏位置. View mContentChild = mContentView.getChildAt(0); mContentChild.setFitsSystemWindows(false); ((View) appBarLayout.getParent()).setFitsSystemWindows(false); appBarLayout.setFitsSystemWindows(false); collapsingToolbarLayout.setFitsSystemWindows(false); collapsingToolbarLayout.getChildAt(0).setFitsSystemWindows(false); toolbar.setFitsSystemWindows(false); //为Toolbar添加一个状态栏的高度, 同时为Toolbar添加paddingTop,使Toolbar覆盖状态栏，ToolBar的title可以正常显示. if (toolbar.getTag() == null) { CollapsingToolbarLayout.LayoutParams lp = (CollapsingToolbarLayout.LayoutParams) toolbar.getLayoutParams(); int statusBarHeight = getStatusBarHeight(activity); lp.height += statusBarHeight; toolbar.setLayoutParams(lp); toolbar.setPadding(toolbar.getPaddingLeft(), toolbar.getPaddingTop() + statusBarHeight, toolbar.getPaddingRight(), toolbar.getPaddingBottom()); toolbar.setTag(true); } //移除已经存在假状态栏则,并且取消它的Margin间距 int statusBarHeight = getStatusBarHeight(activity); removeFakeStatusBarViewIfExist(activity); removeMarginTopOfContentChild(mContentChild, statusBarHeight); //添加一个View来作为状态栏的填充 final View statusView = addFakeStatusBarView(activity, statusColor, statusBarHeight); CoordinatorLayout.Behavior behavior = ((CoordinatorLayout.LayoutParams) appBarLayout.getLayoutParams()).getBehavior(); if (behavior != null && behavior instanceof AppBarLayout.Behavior) { int verticalOffset = ((AppBarLayout.Behavior) behavior).getTopAndBottomOffset(); if (Math.abs(verticalOffset) > appBarLayout.getHeight() - collapsingToolbarLayout.getScrimVisibleHeightTrigger()) { statusView.setAlpha(1f); } else { statusView.setAlpha(0f); } } else { statusView.setAlpha(0f); } appBarLayout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() { @Override public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) { if (Math.abs(verticalOffset) > appBarLayout.getHeight() - collapsingToolbarLayout.getScrimVisibleHeightTrigger()) { //toolbar被折叠时显示状态栏 if (statusView.getAlpha() == 0) { statusView.animate().cancel(); statusView.animate().alpha(1f).setDuration(collapsingToolbarLayout.getScrimAnimationDuration()).start(); } } else { //toolbar展开时显示状态栏 if (statusView.getAlpha() == 1) { statusView.animate().cancel(); statusView.animate().alpha(0f).setDuration(collapsingToolbarLayout.getScrimAnimationDuration()).start(); } } } }); } static void setStatusBarWhiteForCollapsingToolbar(final Activity activity, AppBarLayout appBarLayout, final CollapsingToolbarLayout collapsingToolbarLayout, Toolbar toolbar, final int statusBarColor) { final Window window = activity.getWindow(); window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS); ViewGroup mContentView = (ViewGroup) window.findViewById(Window.ID_ANDROID_CONTENT); View mContentChild = mContentView.getChildAt(0); mContentChild.setFits