[置顶] android ScrollView，ListView 截屏并保存到图库

需求截图出如下长图片：

已经写成一个类可直接使用，直接上代码：
/** * 项目名称：测试截屏 * 类描述：截屏 * 创建人：ZhaoGL * 创建时间：2016/4/26 13:47 */public class ScreenShot {    private static String TAG = "ScreenShot";    /** * 获取指定Activity的截屏，保存到png文件 * @param activity * @return */    public static Bitmap takeScreenShot(Activity activity) {        // View是你需要截图的View        View view = activity.getWindow().getDecorView();        view.setDrawingCacheEnabled(true);        view.buildDrawingCache();        Bitmap b1 = view.getDrawingCache();        // 获取状态栏高度        Rect frame = new Rect();        activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);        int statusBarHeight = frame.top;        System.out.println(statusBarHeight);        // 获取屏幕长和高        int width = activity.getWindowManager().getDefaultDisplay().getWidth();        int height = activity.getWindowManager().getDefaultDisplay()                .getHeight();        // 去掉标题栏        // Bitmap b = Bitmap.createBitmap(b1, 0, 25, 320, 455);        Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height                - statusBarHeight);        view.destroyDrawingCache();        savePic(b, "/sdcard/screen_test.png");        return b;    }    /** * 保存到sdcard * @param b * @param strFileName */    public static void savePic(Bitmap b, String strFileName) {        FileOutputStream fos = null;        try {            fos = new FileOutputStream(strFileName);            if (null != fos) {                b.compress(Bitmap.CompressFormat.PNG, 90, fos);                fos.flush();                fos.close();            }        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }    /** * 把View对象转换成bitmap * */    public static Bitmap convertViewToBitmap(View view) {        view.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));        view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());        view.buildDrawingCache();        Bitmap bitmap = view.getDrawingCache();        return bitmap;    }    public static Bitmap getViewBitmap(View v) {        v.clearFocus();        v.setPressed(false);        boolean willNotCache = v.willNotCacheDrawing();        v.setWillNotCacheDrawing(false);        int color = v.getDrawingCacheBackgroundColor();        v.setDrawingCacheBackgroundColor(0);        if (color != 0) {            v.destroyDrawingCache();        }        v.buildDrawingCache();        Bitmap cacheBitmap = v.getDrawingCache();        if (cacheBitmap == null) {            return null;        }        Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);        v.destroyDrawingCache();        v.setWillNotCacheDrawing(willNotCache);        v.setDrawingCacheBackgroundColor(color);        return bitmap;    }    /** * 截取scrollview的屏幕 * * */    public static Bitmap getBitmapByView(ScrollView scrollView) {        int h = 0;        Bitmap bitmap = null;        // 获取listView实际高度        for (int i = 0; i < scrollView.getChildCount(); i++) {            h += scrollView.getChildAt(i).getHeight();            scrollView.getChildAt(i).setBackgroundColor(                    Color.parseColor("#ffffff"));        }        Log.d(TAG, "实际高度:" + h);        Log.d(TAG, " 高度:" + scrollView.getHeight());        // 创建对应大小的bitmap        bitmap = Bitmap.createBitmap(scrollView.getWidth(), h,                Bitmap.Config.ARGB_8888);        final Canvas canvas = new Canvas(bitmap);        scrollView.draw(canvas);        return bitmap;    }    /** * ListView 截屏 * @param listView * @param context * @return */    public  static Bitmap createBitmap(ListView listView, Context context){        int titleHeight,width, height, rootHeight=0;        Bitmap bitmap;        Canvas canvas;        int yPos = 0;        int listItemNum;        List<View> childViews = null;        width = getDisplayMetrics(context)[0];//宽度等于屏幕宽        ListAdapter listAdapter = listView.getAdapter();        listItemNum = listAdapter.getCount();        childViews = new ArrayList<View>(listItemNum);        View itemView;        //计算整体高度:        for(int pos=0; pos < listItemNum; ++pos){            itemView = listAdapter.getView(pos, null, listView);            //measure过程            itemView.measure(View.MeasureSpec.makeMeasureSpec(width, View. MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));            childViews.add(itemView);            rootHeight += itemView.getMeasuredHeight();        }        height = rootHeight;        // 创建对应大小的bitmap        bitmap = Bitmap.createBitmap(listView.getWidth(), height,                Bitmap.Config.ARGB_8888);        //bitmap = BitmapUtil.createBitmap(width, height, Bitmap.Config.ARGB_8888);        canvas = new Canvas(bitmap);        Bitmap itemBitmap;        int childHeight;        //把每个ItemView生成图片，并画到背景画布上        for(int pos=0; pos < childViews.size(); ++pos){            itemView = childViews.get(pos);            childHeight = itemView.getMeasuredHeight();            itemBitmap = viewToBitmap(itemView,width,childHeight);            if(itemBitmap!=null){                canvas.drawBitmap(itemBitmap, 0, yPos, null);            }            yPos = childHeight +yPos;        }        canvas.save(Canvas.ALL_SAVE_FLAG);        canvas.restore();        return bitmap;    }    private static Bitmap viewToBitmap(View view, int viewWidth, int viewHeight){        view.layout(0, 0, viewWidth, viewHeight);        view.buildDrawingCache();        Bitmap bitmap = view.getDrawingCache();        return bitmap;    }    /** * 压缩图片 * @param image * @return */    public static Bitmap compressImage(Bitmap image) {        ByteArrayOutputStream baos = new ByteArrayOutputStream();        // 质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中        image.compress(Bitmap.CompressFormat.JPEG, 100, baos);        int options = 100;        // 循环判断如果压缩后图片是否大于100kb,大于继续压缩        while (baos.toByteArray().length / 1024 > 100) {            // 重置baos            baos.reset();            // 这里压缩options%，把压缩后的数据存放到baos中            image.compress(Bitmap.CompressFormat.JPEG, options, baos);            // 每次都减少10            options -= 10;        }        // 把压缩后的数据baos存放到ByteArrayInputStream中        ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());        // 把ByteArrayInputStream数据生成图片        Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);        return bitmap;    }    /** * 获取屏幕分辨率 * * @param context * @return */    public static final Integer[] getDisplayMetrics(Context context) {        DisplayMetrics dm = new DisplayMetrics();        dm = context.getApplicationContext().getResources().getDisplayMetrics();        int screenWidth = dm.widthPixels;        int screenHeight = dm.heightPixels;        return new Integer[]{screenWidth, screenHeight};    }    /** * 保存图片并插入图库 * @param context * @param bmp * @param dir 文件夹 */    public static void saveImageToGallery(Context context, Bitmap bmp,String dir) {        // 首先保存图片        File appDir = new File(Environment.getExternalStorageDirectory(), dir);        if (!appDir.exists()) {            appDir.mkdir();        }        String fileName = System.currentTimeMillis() + ".jpg";        File file = new File(appDir, fileName);        try {            FileOutputStream fos = new FileOutputStream(file);            bmp.compress(Bitmap.CompressFormat.JPEG, 100, fos);            fos.flush();            fos.close();        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        // 其次把文件插入到系统图库        try {            MediaStore.Images.Media.insertImage(context.getContentResolver(),                    file.getAbsolutePath(), fileName, null);        } catch (FileNotFoundException e) {            e.printStackTrace();        }        // 最后通知图库更新        String path = appDir + fileName;        context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + path)));    }}
调用方法很简单，下面放上例子：
例子代码下载
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