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Android 上传文件

news 来源：原创 2024/5/19 5:50:23

上传文件其实就通过文件中数据，通过tcp/ip协议，把内容传到服务器中。

可以单独的利用java中的socket或者是urlconnection进行io输入输出就可以了。

但是做过web的都知道，可以通过form表单进行上传文件。

<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>

这样可以利用androidapi自带的httpclient进行模仿web中的form表单进行提交。

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 {
		// 需要上传的文件
		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);
			// 上传的结果，可以使json，或者是返回上传后文件的的url
			log("result = " + result);
			log("上传成功");
		}
	}

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

上面的代码中需要MultipartEntity，这个是第三方jar文件（httpmime-4.1.1.jar），需要添加到libs文件夹中。

转载于:https://www.cnblogs.com/liushuibufu/p/4140919.html