通过rxjava保存一整块view到手机相册_java保存view图片-优快云博客

本文介绍了一种将Android应用中的View保存为图片的方法，并将其存储到设备相册中。通过创建Bitmap并使用FileOutputStream进行写入，同时处理了不同Android版本的广播通知。实现了从View到图片的转换及保存流程。

保存一整块view的代码

//执行操作
btn_save.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ViewUtil.createDialog(getActivity(), QMUITipDialog.Builder.ICON_TYPE_LOADING);
                saveView(getViewBitmap(rl_download_code));
            }
        });
        
private void saveView(Bitmap drawingCache) {
        Observable.create(new SaveObservable(drawingCache))
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new SaveSubscriber());
    }
    
/**
     * 某些机型直接获取会为null,在这里处理一下防止国内某些机型返回null
     */
    private Bitmap getViewBitmap(View view) {
        if (view == null) {
            return null;
        }
        Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        view.draw(canvas);
        return bitmap;
    }

处理结果

private class SaveSubscriber extends Subscriber<String> {

        @Override
        public void onCompleted() {
            ViewUtil.dismissDialog();
            showLongToast("保存成功");
        }

        @Override
        public void onError(Throwable e) {
            ViewUtil.dismissDialog();
            showLongToast("保存失败");
            Log.i(getClass().getSimpleName(), e.toString());
        }

        @Override
        public void onNext(String s) {
            Log.i(getClass().getSimpleName(), s);
        }
    }

通知相册及保存

private class SaveObservable implements Observable.OnSubscribe<String> {

        private Bitmap drawingCache = null;

        public SaveObservable(Bitmap drawingCache) {
            this.drawingCache = drawingCache;
        }

        @Override
        public void call(Subscriber<? super String> subscriber) {
            if (drawingCache == null) {
                subscriber.onError(new NullPointerException("View获取为null"));
            } else {
                FileOutputStream out;
                try {
                    String picturePath = "/mnt/sdcard/DCIM/Camera/";
                    File file = new File(picturePath);
                    if (!file.exists()) {
                        file.mkdir();
                    }
                    String pictureName = System.currentTimeMillis() + ".jpg";
                    File picturefile = new File(file, pictureName);
                    out = new FileOutputStream(picturefile);
                    drawingCache.compress(Bitmap.CompressFormat.WEBP, 100, out);
                    out.flush();
                    out.close();
                    try {
                        MediaStore.Images.Media.insertImage(activity.getContentResolver(),
                                picturefile.getAbsolutePath(), pictureName, null);
                    } catch (FileNotFoundException e) {
                        subscriber.onError(new NullPointerException("View操作异常"));
                        e.printStackTrace();
                    }
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                        Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
                        Uri uri = Uri.fromFile(picturefile);
                        intent.setData(uri);
                        activity.sendBroadcast(intent);
                    } else {
                        activity.sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + picturefile)));
                    }
                    subscriber.onNext(picturefile.getPath());
                    subscriber.onCompleted();
                } catch (IOException e) {
                    subscriber.onError(new NullPointerException("View操作异常"));
                    e.printStackTrace();
                }
            }
        }
    }