Android 上傳文件

MarvinMonta 8年前發布 | 7K 次閱讀 Android開發 移動開發

來自： http://blog.csdn.net//guijiaoba/article/details/19287115


上傳文件其實就通過文件中數據，通過tcp/ip協議，把內容傳到服務器中。

可以單獨的利用java中的socket或者是urlconnection進行io輸入輸出就可以了。

但是做過web的都知道，可以通過form表單進行上傳文件。

<html>
<body>
<form action="upload_file.php" method="post"
enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file" /> 
<br />
<input type="submit" name="submit" value="Submit" />
</form>
</body>
</html>

這樣可以利用androidapi自帶的httpclient進行模仿web中的form表單進行提交。 

package com.example.testandroidupload;

import java.io.File;
import java.io.FileInputStream;

import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.HttpVersion;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.InputStreamBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.CoreConnectionPNames;
import org.apache.http.params.CoreProtocolPNames;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

public class MainActivity extends Activity {

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        new Thread() {
            public void run() {
                try {
                    doUPload();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            };
        }.start();
    }

    public HttpClient createClient() {
        HttpParams params = new BasicHttpParams();
        params.setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
        params.setParameter(CoreProtocolPNames.HTTP_CONTENT_CHARSET, HTTP.DEFAULT_CONTENT_CHARSET);
        params.setBooleanParameter(CoreProtocolPNames.USE_EXPECT_CONTINUE, true);
        params.setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 30 * 1000);
        params.setParameter(CoreConnectionPNames.SO_TIMEOUT, 30 * 1000);

        SchemeRegistry schReg = new SchemeRegistry();
        schReg.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
        schReg.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), 443));
        ClientConnectionManager conMgr = new ThreadSafeClientConnManager(params, schReg);

        return new DefaultHttpClient(conMgr, params);
    }

    void doUPload() throws Exception {
        // 需要上傳的文件
        File file = new File("/mnt/sdcard/test.png");
        FileInputStream fis = new FileInputStream(file);
        HttpClient httpclient = createClient();
        String url = "";

        MultipartEntity me = new MultipartEntity();
        me.addPart("file", new InputStreamBody(fis, file.getName()));

        HttpPost httpPost = new HttpPost(url);
        httpPost.setEntity(me);

        HttpResponse httpResponse = httpclient.execute(httpPost);

        int code = httpResponse.getStatusLine().getStatusCode();
        log("http status code:" + code);
        if (code == HttpStatus.SC_OK) {
            String result = EntityUtils.toString(httpResponse.getEntity(), HTTP.UTF_8);
            // 上傳的結果，可以使json，或者是返回上傳后文件的的url
            log("result = " + result);
            log("上傳成功");
        }
    }

    static void log(String msg) {
        Log.i("test", msg);
    }
}

上面的代碼中需要MultipartEntity，這個是第三方jar文件（httpmime-4.1.1.jar），需要添加到libs文件夾中。


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