Android从图库上传图片到服务器

Question

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Answer 1

要从您的应用程序上传图像到服务器，您可以按照以下教程操作:

1. Uploading files to HTTP server using POST on Android.

2. Upload image or file using http POST multi-part.

以上两个 url 将向您解释如何将图像从您的应用程序上传到服务器。

要从您的照片库上传图片，您需要该图片文件的路径，并将获取的路径替换为第一个 url 中的 /data/file_to_send.mp3。

获取手机相册图片的路径可以按照下面的代码:

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        b1 = (Button)findViewById(R.id.Button01);

        b1.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                openGallery(SELECT_FILE1);
            }
        });
    }

    public void openGallery(int req_code) {

        Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent,
                               "Select file to upload "), req_code);
    }

    public void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (resultCode == RESULT_OK) {
            Uri selectedImageUri = data.getData();

            if (requestCode == SELECT_FILE1) {
                selectedPath1 = getPath(selectedImageUri);
                System.out.println("selectedPath1 : " + selectedPath1);
            }

            if (requestCode == SELECT_FILE2) {
                selectedPath2 = getPath(selectedImageUri);
                System.out.println("selectedPath2 : " + selectedPath2);
            }

            tv.setText("Selected File paths : " + selectedPath1 + "," + selectedPath2);
        }
    }

    public String getPath(Uri uri) {

        String[] projection = { MediaStore.Images.Media.DATA };
        Cursor cursor = managedQuery(uri, projection, null, null, null);
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();

        return cursor.getString(column_index);
    }

要下载图片，您可以执行以下代码。

    ImageView image = (ImageView)findViewById(R.id.image);
    if(!ImageUrl.equals("no image")) {          
        try {
            image.setImageDrawable(grabImageFromUrl(ImageUrl));

        } catch(Exception e) {     
          }  
    } 

    private Drawable grabImageFromUrl(String url) throws Exception {
          return Drawable.createFromStream((InputStream)new URL(url).getContent(), "src");
    }