android - 如何将GIF图片保存到SD卡中？

Question

我是android新手，想通过android编程将GIF图片保存到sdcard中。目前我已经从谷歌做了一些代码来将 GIF 图像保存在 sdcard 中。但是当我将该图像保存到 SD 卡时，它将显示普通图像而不是 GIF 图像。

这是我显示GIF图片的代码

//Save code
    save.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            Bitmap image = BitmapFactory.decodeResource(getResources(),
                    R.drawable.gpp3);
            File outputFile = new File("/sdcard/gpp3.gif");
            FileOutputStream fos = null;
            try {
                fos = new FileOutputStream(outputFile);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }

            if (fos != null) {
                AnimatedGifEncoder gifEncoder = new AnimatedGifEncoder();
                gifEncoder.start(fos);
                gifEncoder.addFrame(image);
                gifEncoder.finish();
            }

        }
    });

所以，上面的代码有什么问题，请告诉我。

Answer 1

我不确定，但根据你的要求，你应该先打开你的 GIF，然后在你转换成字节数组之后保存它。我希望你能得到你的解决方案

private void saveGIF()
    {
        try
        {
            File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), "shared_gif_shai" + System.currentTimeMillis() + ".gif");

            long startTime = System.currentTimeMillis();

            Log.d(TAG, "on do in background, url open connection");

            InputStream is = getResources().openRawResource(R.drawable.g);
            Log.d(TAG, "on do in background, url get input stream");
            BufferedInputStream bis = new BufferedInputStream(is);
            Log.d(TAG, "on do in background, create buffered input stream");

            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            Log.d(TAG, "on do in background, create buffered array output stream");

            byte[] img = new byte[1024];

            int current = 0;

            Log.d(TAG, "on do in background, write byte to baos");
            while ((current = bis.read()) != -1) {
                baos.write(current);
            }


            Log.d(TAG, "on do in background, done write");

            Log.d(TAG, "on do in background, create fos");
            FileOutputStream fos = new FileOutputStream(file);
            fos.write(baos.toByteArray());

            Log.d(TAG, "on do in background, write to fos");
            fos.flush();

            fos.close();
            is.close();
            Log.d(TAG, "on do in background, done write to fos");
        }
        catch (Exception e) {
            e.printStackTrace();
        }
    }

并且还在你的 AndroidMenifest.xml 文件中授予此权限

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>