Android开发截屏截图方法汇总

[原创文章：www.ii77.com]

黑客手艺

点击右侧存眷，认识黑客的世界！

[本文来自：www.ii77.com]

Java斥地进阶

点击右侧存眷，把握进阶之路！

Python斥地

点击右侧存眷，商量手艺话题！

作者 |  BillyZuo

链接：

https://www.jianshu.com/p/81c413a3692f

一、Activity截屏

1、截Activity界面（包含空白的状况栏）

/**
     * 凭据指定的Activity截图（带空白的状况栏）
     *
     * @param context 要截图的Activity
     * @return Bitmap
     */  
    public static Bitmap shotActivity(Activity context) {
        View view = context.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
  
        Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache(), 0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
        view.setDrawingCacheEnabled(false);
        view.destroyDrawingCache();
        return bitmap;
    }

2、截Activity界面（去除状况栏）

/**
     * 凭据指定的Activity截图（去除状况栏）
     *
     * @param activity 要截图的Activity
     * @return Bitmap
     */  
    public Bitmap shotActivityNoStatusBar(Activity activity) {
        // 获取windows中最顶层的view
        View view = activity.getWindow().getDecorView();
        view.buildDrawingCache();
  
        // 获取状况栏高度
        Rect rect = new Rect();
        view.getWindowVisibleDisplayFrame(rect);
        int statusBarHeights = rect.top;
        Display display = activity.getWindowManager().getDefaultDisplay();
  
        // 获取屏幕宽和高
        int widths = display.getWidth();
        int heights = display.getHeight();
  
        // 许可当前窗口留存缓存信息
        view.setDrawingCacheEnabled(true);
  
        // 去掉状况栏
        Bitmap bmp = Bitmap.createBitmap(view.getDrawingCache(), 0,
                statusBarHeights, widths, heights - statusBarHeights);
  
        // 销毁缓存信息
        view.destroyDrawingCache();
  
        return bmp;
    }

二、View截屏

/**
 * 凭据指定的view截图
 *
 * @param v 要截图的view
 * @return Bitmap
 */  
public static Bitmap getViewBitmap(View v) {
    if (null == v) {
        return null;
    }
    v.setDrawingCacheEnabled(true);
    v.buildDrawingCache();
    if (Build.VERSION.SDK_INT >= 11) {
        v.measure(View.MeasureSpec.makeMeasureSpec(v.getWidth(), View.MeasureSpec.EXACTLY),
                View.MeasureSpec.makeMeasureSpec(v.getHeight(), View.MeasureSpec.EXACTLY));
        v.layout((int) v.getX(), (int) v.getY(), (int) v.getX() + v.getMeasuredWidth(), (int) v.getY() + v.getMeasuredHeight());
    } else {
        v.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
        v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
    }
  
    Bitmap bitmap = Bitmap.createBitmap(v.getDrawingCache(), 0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
    v.setDrawingCacheEnabled(false);
    v.destroyDrawingCache();
    return bitmap;
}

三、ScrollView截屏

ScrollView只有一个childView，固然没有悉数显露在界面上，然则已经悉数衬着绘制，是以能够直接 挪用scrollView.draw(canvas)来完成截图

/**
 * Scrollview截屏
 *
 * @param scrollView 要截图的ScrollView
 * @return Bitmap
 */  
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;
}

四、ListView截屏

ListView是会收受与重用Item，而且只会绘制在屏幕上显露的ItemView，下面的方式采用一个List来存储Item的视图，这种方案依然不敷好，当Item充沛多的时候，或者会发生oom。

/**
 * ListView截图
 *
 * @param listView 要截图的ListView
 * @return Bitmap
 */  
public static Bitmap shotListView(ListView listView) {
    ListAdapter adapter = listView.getAdapter();
    int itemsCount = adapter.getCount();
    int allItemsHeight = 0;
  
    ArrayList<Bitmap> bmps = new ArrayList<>();
    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;
}

五、RecyclerView截屏

/**
     * RecyclerView截屏
     *
     * @param view 要截图的RecyclerView
     * @return Bitmap
     */  
    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;
    }

六、WebView截屏

1、截取webView可视区域的截图

/**
    * 截取webView可视区域的截图
    * @param webView 前提：WebView要设置webView.setDrawingCacheEnabled(true);
    * @return   
    */    
private Bitmap captureWebViewVisibleSize(WebView webView){
    Bitmap bmp = webView.getDrawingCache();
    return bmp;
}

2、截取webView的整个页面

/**
 * 截取webView快照(webView加载的整个内容的巨细)
 * @param webView
 * @return   
 */    
private Bitmap captureWebView(WebView webView){
    Picture snapShot = webView.capturePicture();
        
    Bitmap bmp = Bitmap.createBitmap(snapShot.getWidth(),snapShot.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bmp);
    snapShot.draw(canvas);
    return bmp;
}

3、截取手机屏幕，获取界面展示的webview

/**
 * 截屏
 *
 * @param context
 * @return 
 */  
private Bitmap captureScreen(Activity context) {
    View cv = context.getWindow().getDecorView();
    Bitmap bmp = Bitmap.createBitmap(cv.getWidth(), cv.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bmp);
    cv.draw(canvas);
    return bmp;
}

 介绍↓↓↓ 

长

按

关

注