View不需要現在在屏幕上，到達截圖效果

背景

new一個有各種信息的View，不需要顯示給用戶，對這個View截圖。上傳分享等…

參考

代碼實現

1. ViewUtils.layoutView(view, 290, 210); 需要放在所有子view都bind完成後再調用，否則界面會亂掉
2. 用ConstraintLayout佈局，call ViewUtils.layoutView(view, 290, 210); 整個頁面也亂掉

public static void layoutView(View v, int width, int height) {
        // validate view.width and view.height
        v.layout(0, 0, width, height);
        int measuredWidth = View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY);
        int measuredHeight = View.MeasureSpec.makeMeasureSpec(height, View.MeasureSpec.EXACTLY);

        // validate view.measurewidth and view.measureheight
        v.measure(measuredWidth, measuredHeight);
        v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
    }

2.保存圖片到sdcard

public static Pair<Boolean, String> saveBitmapToSdCard(Context context, Bitmap srcBitmap, String name) {
        boolean result = false;
//        //創建位圖保存目錄
//        String path = Environment.getExternalStorageDirectory() + "/temp/";
//        File sd = new File(path);
//        if (!sd.exists()) {
//            sd.mkdir();
//        }
//        File file = new File(sd, name + ".jpg");

        File cacheFile = context.getCacheDir();
        File file = new File(cacheFile, name + ".jpg");


        FileOutputStream fileOutputStream = null;
        if (file.exists()) {
            file.delete();
        }
        try {
            fileOutputStream = new FileOutputStream(file);
            srcBitmap.compress(Bitmap.CompressFormat.JPEG, 90, fileOutputStream);
            fileOutputStream.flush();
            result = true;

        } catch (Exception e) {
            LOG.e("BitmapUtil", e.getMessage(), e);
        } finally {
            Util.closeIOQuietly(fileOutputStream);
        }

        return new Pair<>(result, file.getAbsolutePath());
    }
    

    final View view = View.inflate(context, R.layout.xxx, null);
    ImageView icon = view.findViewById(R.id.iv);
    GlideApp.with(icon)
            .load(url)
            .placeholder(resId)
            .listener(new RequestListener<Drawable>() {
                @Override
                public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Drawable> target, boolean isFirstResource) {
                    return false;
                }

                @Override
                public boolean onResourceReady(Drawable resource, Object model, Target<Drawable> target, DataSource dataSource, boolean isFirstResource) {
                    return false;
                }
            })
            .into(icon);
    TextView tvName = view.findViewById(R.id.tv_name);
    tvName.setText(mArgumentMap.get("name"));

    TextView tvTitle = view.findViewById(R.id.tv_title);
    tvTitle.setText(mArgumentMap.get("title"));

    TextView tvDescription = view.findViewById(R.id.tv_description);
    tvDescription.setText(mArgumentMap.get("description"));

    ViewUtils.layoutView(view, 290, 210);

    final boolean drawingCacheEnabled = true;
    view.setDrawingCacheEnabled(drawingCacheEnabled);

    ThreadUtils.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            view.buildDrawingCache(drawingCacheEnabled);
            Bitmap drawingCache = view.getDrawingCache();
            Bitmap bitmap;
            if (drawingCache != null) {
                bitmap = Bitmap.createBitmap(drawingCache);
                view.setDrawingCacheEnabled(false);
            } else {
                bitmap = null;
            }
            if (bitmap != null) {
                Pair<Boolean, String> stringPair = BitmapUtil.saveBitmapToSdCard(context, bitmap, "imo_zone");
                if (stringPair != null && stringPair.first) {
                    //
                }
            } else {
                IMOLOG.trace(TAG, "failed to save bitmap");
            }
        }
    }, 200);