Volley 网络框架实现文件上传

1.首先自己写一个MultipartRequest类，继承自StringRequest。

import com.android.internal.http.multipart.Part;
import com.android.volley.AuthFailureError;
import com.android.volley.Response;
import com.android.volley.VolleyLog;
import com.android.volley.toolbox.StringRequest;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

public class MultipartRequest extends StringRequest {
    private Part[] parts;

    public MultipartRequest(String url, Part[] parts, Response.Listener<String> listener, Response.ErrorListener errorListener) {
        super(Method.POST, url, listener, errorListener);
        this.parts = parts;
    }

    @Override
    public String getBodyContentType() {
        return "multipart/form-data; boundary=" + Part.getBoundary();
    }

    @Override
    public byte[] getBody() throws AuthFailureError {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try {
            Part.sendParts(baos, parts);
        } catch (IOException e) {
            VolleyLog.e(e, "error when sending parts to output!");
        }
        return baos.toByteArray();
    }
}

2.使用方法

//构造参数列表
List<Part> partList = new ArrayList<Part>();
partList.add(new StringPart("username", "hellfire"，“UTF-8”));
partList.add(new StringPart("email", "[email protected]"，“UTF-8”));
try {
    partList.add(new FilePart("photo", new File("/mnt/sdcard/Test/hellfire.jpg")));
} catch (FileNotFoundException e) {
    e.printStackTrace();
}
//获取队列
RequestQueue requestQueue = Volley.newRequestQueue(this);
String url = "http://test/profileUpdate.do";
//生成请求
MultipartRequest profileUpdateRequest = new MultipartRequest(url, partList.toArray(new Part[partList.size()]), new Response.Listener<String>() {
    @Override
    public void onResponse(String response) {
        //处理成功返回信息
        String info = response.substring(0, 20);
        Toast.makeText(getApplication(), info, Toast.LENGTH_SHORT).show();
    }
}, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
        //处理失败错误信息
        Log.e("MultipartRequest", error.getMessage(), error);
        Toast.makeText(getApplication(), error.getMessage(), Toast.LENGTH_SHORT).show();
    }
});
//将请求加入队列
requestQueue.add(profileUpdateRequest);