如何在android中将图像发布到服务器 [英] How to post an image to server in android

问题描述

如何将图像上传到服务器？在API级别23中不推荐使用MultiPArtEntity和MultiPartEntityBuilder类。我们可以使用HTTPUrlConnection或者排球吗？

How do I upload an image to the Server? Both MultiPArtEntity and MultiPartEntityBuilder classes are deprecated in API level 23. Can we do this using HTTPUrlConnection or volley?

推荐答案

我建议你使用OkHttp。有关它的更多详细信息，请参阅以下内容：

I suggest that you use OkHttp. More details about it you can find at the following:

OkHttp - HTTP&适用于Android和Java应用程序的SPDY客户端

请参阅我从可绘制文件夹上传PNG文件的基本示例代码远程Web服务。希望这会有所帮助！

Please refer to my basic sample code that uploads a PNG file from drawable folder to remote web service. Hope this helps!

...
    mTextView = (TextView) findViewById(R.id.textView);
    mHandler = new Handler(Looper.getMainLooper());
...
    Drawable drawable = getResources().getDrawable(R.drawable.ic_launcher);
    if (drawable != null) {
        Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 0, stream);
        final byte[] bitmapdata = stream.toByteArray();

        OkHttpClient client = new OkHttpClient();
        RequestBody requestBody = new MultipartBuilder()
                .type(MultipartBuilder.FORM)
                .addPart(
                        Headers.of("Content-Disposition", "form-data; name=\"file\"; filename=\"ic_launcher.png\""),
                        RequestBody.create(MEDIA_TYPE_PNG, bitmapdata))
                .build();
        final Request request = new Request.Builder()
                .url("http://myserver/api/files")
                .post(requestBody)
                .build();
        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(final Request request, final IOException e) {
                Log.e(LOG_TAG, e.toString());
                mHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(mContext, e.toString(), Toast.LENGTH_SHORT).show();
                        mTextView.setText(e.toString());
                    }
                });
            }

            @Override
            public void onResponse(Response response) throws IOException {
                final String message = response.toString();
                Log.i(LOG_TAG, message);
                mHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(mContext, message, Toast.LENGTH_SHORT).show();
                        mTextView.setText(message);
                    }
                });
            }
        });
    }

这篇关于如何在android中将图像发布到服务器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！