java - 如何在android中将所有位图图像发送到sdcard

Question

要通过彩信分享图像，代码可以正常工作。我所做的是，将可绘制图像转换为位图并保存在 SD 卡中。并通过 Intent 检索发送，这是一张图像，我很惊讶将数组中的所有图像发送到 SD 卡。 在下面的代码中，我将图像放在可绘制的数组中，并将所有 4 个图像转换为位图，如何将这 4 个图像发送到 sdcard？

 private void doSendIntent(String subject, String text) {
      try {
    Intent sendIntent = new Intent(android.content.Intent.ACTION_SEND);
       sendIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, subject);
    sendIntent.putExtra(android.content.Intent.EXTRA_TEXT, text); 
   sendIntent.setType("image/png");

   ArrayList<Integer> myImageList = new ArrayList<Integer>();
    myImageList.add(R.drawable.gicon);
    myImageList.add(R.drawable.ic_launcher);
    myImageList.add(R.drawable.loadin);
    myImageList.add(R.drawable.splash);


    Bitmap bbicon;
    bbicon = BitmapFactory.decodeResource(this.cordova.getActivity().getResources(),
            R.drawable.gicon);
    bbicon = BitmapFactory.decodeResource(this.cordova.getActivity().getResources(),
            R.drawable.ic_launcher);
    bbicon = BitmapFactory.decodeResource(this.cordova.getActivity().getResources(),
            R.drawable.loadin);
    bbicon = BitmapFactory.decodeResource(this.cordova.getActivity().getResources(),
            R.drawable.splash);


    String extStorageDirectory = Environment.getExternalStorageDirectory().toString();          
    OutputStream outStream = null;

    File f = new File(extStorageDirectory + "/Download/",
            "gicon.png");
    try {
        outStream = new FileOutputStream(f);
        bbicon.compress(Bitmap.CompressFormat.PNG, 100, outStream);
        outStream.flush();
        outStream.close();

         System.out.println("ssssssssssssssssss");
    } catch (Exception e) {
    }
    }

    //RETRIEVING IMAGES FROM SDCARD

    File fl = new File(Environment.getExternalStorageDirectory()
            .getAbsolutePath() + "/Download/", "gicon.png");

    Uri uri = Uri.fromFile(fl);
    sendIntent.putExtra(Intent.EXTRA_STREAM, uri);
    this.cordova.startActivityForResult(this, sendIntent, 0); 

      }
      catch(Exception e) 
      {
       System.out.println(" no error here");

       e.printStackTrace();
      }

Answer 1

使用下面的代码。

private void copyAssets() {
AssetManager assetManager = getAssets();
String[] files = null;
try {
    files = assetManager.list("");
} catch (IOException e) {
    Log.e("tag", e.getMessage());
}
for(String filename : files) {
    InputStream in = null;
    OutputStream out = null;
    try {
      in = assetManager.open(filename);
      out = new FileOutputStream("/sdcard/" + filename);
      copyFile(in, out);
      in.close();
      in = null;
      out.flush();
      out.close();
      out = null;
    } catch(Exception e) {
        Log.e("tag", e.getMessage());
    }       
  }
}
private void copyFile(InputStream in, OutputStream out) throws IOException {
   byte[] buffer = new byte[1024];
   int read;
   while((read = in.read(buffer)) != -1){
   out.write(buffer, 0, read);
 }
}

从 list 文件中获取以下权限

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