Android Volley 小文件上传如图片-Kotlin

Freda ·

更新时间:2024-09-21

· 508 次阅读

Android Volley 小文件上传如图片-Kotlin添加依赖编写工具VolleyUploadRequest使用HttpWorker完事 添加依赖

implementation 'com.android.volley:volley:1.1.1'

编写工具VolleyUploadRequest


import com.android.volley.*
import com.android.volley.toolbox.HttpHeaderParser
import java.io.ByteArrayOutputStream
import java.io.File
import java.io.FileInputStream
import java.lang.Exception
import java.nio.charset.Charset
/**
 * volley 文件上传
 * @author D10NG
 * @date on 2020-01-03 14:13
 */
class VolleyUploadRequest(
    url: String,              // 地址
    val fileName: String,     // 文件名
    val file: File,           // 文件
    val fileMime: String,     // 文件类型
    val listener: Response.Listener,
    errorListener: Response.ErrorListener
) : Request(Method.POST, url, errorListener) {
    companion object{
        private const val boundary = "*****"
    }
    init {
        setShouldCache(false)
        retryPolicy = DefaultRetryPolicy(6000,
            DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
            DefaultRetryPolicy.DEFAULT_BACKOFF_MULT)
    }
    override fun parseNetworkResponse(response: NetworkResponse?): Response {
        return try {
            val str = String(response?.data?: byteArrayOf(),
                Charset.forName(HttpHeaderParser.parseCharset(response?.headers?: emptyMap())))
            Response.success(str, HttpHeaderParser.parseCacheHeaders(response))
        } catch (e: Exception) {
            Response.error(ParseError(e))
        }
    }
    override fun deliverResponse(response: String) {
        listener.onResponse(response)
    }
    override fun getBodyContentType(): String {
        return "multipart/form-data; boundary=$boundary"
    }
    override fun getBody(): ByteArray {
        val bos = ByteArrayOutputStream()
        val buffer = StringBuffer()
        /** 第一行 */
        // --boundary
        buffer.append("--$boundary\r\n")
        /** 第二行 */
        // Content-Disposition: form-data; name="fileName"; filename="xxx.png";
        buffer.append("Content-Disposition: form-data; ")
        buffer.append("name=\"$fileName\"; ")
        buffer.append("filename=\"${file.name}\";\r\n")
        /** 第三行 */
        // Content-Type: image/png
        buffer.append("Content-Type: $fileMime;\r\n")
        /** 第四行 */
        // \r\n
        buffer.append("\r\n")
        // 写入
        bos.write(buffer.toString().toByteArray(Charset.forName("utf-8")))
        /** 第五行 */
        // 文件二进制数据
        val fis = FileInputStream(file)
        val bytes = ByteArray(1024)
        var length = fis.read(bytes)
        while (length >= 0) {
            bos.write(bytes, 0, length)
            length = fis.read(bytes)
        }
        bos.write("\r\n".toByteArray(Charset.forName("utf-8")))
        fis.close()
        /** 第六行 */
        // 结尾
        bos.write("--$boundary--\r\n".toByteArray(Charset.forName("utf-8")))
        return bos.toByteArray()
    }
}

使用

val uploadReq = VolleyUploadRequest(
            "https://xxx.com/RDphotoUp",
            "image", file, "image/jpeg",
            object : Response.Listener{
                override fun onResponse(response: String?) {
                    if (response == null || response.isEmpty()) {
                        // 上传失败
                        return
                    }
                    LogUtils.e("RDphotoUp", response)
                    // 上传成功
                }
            },
            Response.ErrorListener { error ->
                // 上传出错
            }
        )
        // 加入网络请求排列
        HttpWorker.getInstance(this).addToRequestQueue(uploadReq)

HttpWorker


import android.content.Context
import android.graphics.Bitmap
import android.util.LruCache
import com.android.volley.Request
import com.android.volley.RequestQueue
import com.android.volley.toolbox.ImageLoader
import com.android.volley.toolbox.Volley
/**
 * 网络请求
 *
 * @author D10NG
 * @date on 2019-10-28 09:47
 */
class HttpWorker constructor(context: Context) {
    companion object {
        @Volatile
        private var INSTANCE: HttpWorker? = null
        fun getInstance(context: Context) =
            INSTANCE ?: synchronized(this) {
                INSTANCE ?: HttpWorker(context).also {
                    INSTANCE = it
                }
            }
    }
    val imageLoader: ImageLoader by lazy {
        ImageLoader(requestQueue,
            object : ImageLoader.ImageCache {
                private val cache = LruCache(20)
                override fun getBitmap(url: String): Bitmap {
                    return cache.get(url)
                }
                override fun putBitmap(url: String, bitmap: Bitmap) {
                    cache.put(url, bitmap)
                }
            })
    }
    val requestQueue: RequestQueue by lazy {
        // applicationContext is key, it keeps you from leaking the
        // Activity or BroadcastReceiver if someone passes one in.
        Volley.newRequestQueue(context.applicationContext)
    }
    fun  addToRequestQueue(req: Request) {
        requestQueue.add(req)
    }
}

完事
作者：YD-10-NG

图片 Kotlin volley 文件上传 Android

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