Java tutorial
/* * Copyright (C) 2016. BoBoMEe(wbwjx115@gmail.com) * * 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.bobomee.android.common.util; import android.app.Activity; import android.content.Context; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Point; import android.graphics.Rect; import android.graphics.drawable.ColorDrawable; import android.graphics.drawable.Drawable; import android.os.Build; import android.support.v4.util.LruCache; import android.support.v7.widget.RecyclerView; import android.util.DisplayMetrics; import android.view.View; import android.view.Window; import android.view.WindowManager; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.ScrollView; import java.util.ArrayList; import java.util.List; /** * ?? * * @author BoBoMEe */ public class ScreenUtil { /** * shot the current screen ,with the status but the status is trans * * * @param ctx current activity */ public static Bitmap shotActivity(Activity ctx) { View view = ctx.getWindow().getDecorView(); view.setDrawingCacheEnabled(true); view.buildDrawingCache(); Bitmap bp = Bitmap.createBitmap(view.getDrawingCache(), 0, 0, view.getMeasuredWidth(), view.getMeasuredHeight()); view.setDrawingCacheEnabled(false); view.destroyDrawingCache(); return bp; } /** * shot the current screen ,with the status and navigationbar* */ public static Bitmap ShotActivity$WithoutStatus$WithoutNavigationBar(Activity ctx) { int statusH = getStatusH(ctx); int navigationBarH = getNavigationBarHeight(ctx); View view = ctx.getWindow().getDecorView(); view.setDrawingCacheEnabled(true); view.buildDrawingCache(); Bitmap bp = Bitmap.createBitmap(view.getDrawingCache(), 0, statusH, view.getMeasuredWidth(), view.getMeasuredHeight() - statusH - navigationBarH); view.setDrawingCacheEnabled(false); view.destroyDrawingCache(); return bp; } /** * ? */ public static int getScreenWidth(Context context) { WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); DisplayMetrics outMetrics = new DisplayMetrics(); wm.getDefaultDisplay().getMetrics(outMetrics); return outMetrics.widthPixels; } /** * get the height of screen * */ public static int getScreenH(Context ctx) { int h = 0; if (Build.VERSION.SDK_INT > 13) { Point p = new Point(); ((WindowManager) ctx.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getSize(p); h = p.y; } else { h = ((WindowManager) ctx.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getHeight(); } return h; } /** * get the width of screen ** */ public static int getScreenW(Context ctx) { int w = 0; if (Build.VERSION.SDK_INT > 13) { Point p = new Point(); ((WindowManager) ctx.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getSize(p); w = p.x; } else { w = ((WindowManager) ctx.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getWidth(); } return w; } /** * get the height of status * */ public static int getStatusH(Activity ctx) { Rect s = new Rect(); ctx.getWindow().getDecorView().getWindowVisibleDisplayFrame(s); return s.top; } /** * get the height of status * */ public static int getStatusHeight(Context activity) { int resourceId = activity.getResources().getIdentifier("status_bar_height", "dimen", "android"); return resourceId > 0 ? activity.getResources().getDimensionPixelSize(resourceId) : 0; } /** * get the height of status * */ public static int getStatusH(Context ctx) { int statusHeight = -1; try { Class<?> clazz = Class.forName("com.android.internal.R$dimen"); Object object = clazz.newInstance(); int height = Integer.parseInt(clazz.getField("status_bar_height").get(object).toString()); statusHeight = ctx.getResources().getDimensionPixelSize(height); } catch (Exception e) { e.printStackTrace(); } return statusHeight; } /** * get the height of title * */ public static int getTitleH(Activity ctx) { int contentTop = ctx.getWindow().findViewById(Window.ID_ANDROID_CONTENT).getTop(); return contentTop - getStatusH(ctx); } /** * get the height of NavigationBar */ public static int getNavigationBarHeight(Activity mActivity) { Resources resources = mActivity.getResources(); int resourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android"); int height = resources.getDimensionPixelSize(resourceId); return height; } /** * http://stackoverflow.com/questions/12742343/android-get-screenshot-of-all-listview-items */ public static Bitmap shotListView(ListView listview) { ListAdapter adapter = listview.getAdapter(); int itemscount = adapter.getCount(); int allitemsheight = 0; List<Bitmap> bmps = new ArrayList<Bitmap>(); for (int i = 0; i < itemscount; i++) { View childView = adapter.getView(i, null, listview); childView.measure(View.MeasureSpec.makeMeasureSpec(listview.getWidth(), View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)); childView.layout(0, 0, childView.getMeasuredWidth(), childView.getMeasuredHeight()); childView.setDrawingCacheEnabled(true); childView.buildDrawingCache(); bmps.add(childView.getDrawingCache()); allitemsheight += childView.getMeasuredHeight(); } Bitmap bigbitmap = Bitmap.createBitmap(listview.getMeasuredWidth(), allitemsheight, Bitmap.Config.ARGB_8888); Canvas bigcanvas = new Canvas(bigbitmap); Paint paint = new Paint(); int iHeight = 0; for (int i = 0; i < bmps.size(); i++) { Bitmap bmp = bmps.get(i); bigcanvas.drawBitmap(bmp, 0, iHeight, paint); iHeight += bmp.getHeight(); bmp.recycle(); bmp = null; } return bigbitmap; } /** * https://gist.github.com/PrashamTrivedi/809d2541776c8c141d9a */ public static Bitmap shotRecyclerView(RecyclerView view) { RecyclerView.Adapter adapter = view.getAdapter(); Bitmap bigBitmap = null; if (adapter != null) { int size = adapter.getItemCount(); int height = 0; Paint paint = new Paint(); int iHeight = 0; final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024); // Use 1/8th of the available memory for this memory cache. final int cacheSize = maxMemory / 8; LruCache<String, Bitmap> bitmaCache = new LruCache<>(cacheSize); for (int i = 0; i < size; i++) { RecyclerView.ViewHolder holder = adapter.createViewHolder(view, adapter.getItemViewType(i)); adapter.onBindViewHolder(holder, i); holder.itemView.measure(View.MeasureSpec.makeMeasureSpec(view.getWidth(), View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)); holder.itemView.layout(0, 0, holder.itemView.getMeasuredWidth(), holder.itemView.getMeasuredHeight()); holder.itemView.setDrawingCacheEnabled(true); holder.itemView.buildDrawingCache(); Bitmap drawingCache = holder.itemView.getDrawingCache(); if (drawingCache != null) { bitmaCache.put(String.valueOf(i), drawingCache); } height += holder.itemView.getMeasuredHeight(); } bigBitmap = Bitmap.createBitmap(view.getMeasuredWidth(), height, Bitmap.Config.ARGB_8888); Canvas bigCanvas = new Canvas(bigBitmap); Drawable lBackground = view.getBackground(); if (lBackground instanceof ColorDrawable) { ColorDrawable lColorDrawable = (ColorDrawable) lBackground; int lColor = lColorDrawable.getColor(); bigCanvas.drawColor(lColor); } for (int i = 0; i < size; i++) { Bitmap bitmap = bitmaCache.get(String.valueOf(i)); bigCanvas.drawBitmap(bitmap, 0f, iHeight, paint); iHeight += bitmap.getHeight(); bitmap.recycle(); } } return bigBitmap; } /** * http://blog.csdn.net/lyy1104/article/details/40048329 */ public static Bitmap shotScrollView(ScrollView scrollView) { int h = 0; Bitmap bitmap = null; for (int i = 0; i < scrollView.getChildCount(); i++) { h += scrollView.getChildAt(i).getHeight(); scrollView.getChildAt(i).setBackgroundColor(Color.parseColor("#ffffff")); } bitmap = Bitmap.createBitmap(scrollView.getWidth(), h, Bitmap.Config.RGB_565); final Canvas canvas = new Canvas(bitmap); scrollView.draw(canvas); return bitmap; } /** * http://stackoverflow.com/questions/9791714/take-a-screenshot-of-a-whole-view */ public static Bitmap shotView(View v, int width, int height) { Bitmap b = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); Canvas c = new Canvas(b); v.layout(0, 0, v.getLayoutParams().width, v.getLayoutParams().height); v.draw(c); return b; } }