【暂存】android上传图片到指定网址

最新推荐文章于 2025-07-21 13:15:14 发布

原创最新推荐文章于 2025-07-21 13:15:14 发布 · 288 阅读

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本文介绍了一个简单的Android应用程序如何通过后台线程实现图片上传功能。该应用利用HTTP POST请求将资源中的图片发送到指定服务器，并展示了如何处理HTTP响应。

暂存一下代码，以后有时间来好好总结一下这块。

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		new Thread(new Runnable() {
			@Override
			public void run() {
				post("http://upload.img.go-friends.com.cn/upload.php");
			}
		}).start();
		
	}

	public void post(String string){
		Resources res=getResources();  
		Bitmap bitmap=BitmapFactory.decodeResource(res, R.drawable.imagea);
		byte[] b = getImageBytes(bitmap);
		URL url = null;
		try {
			url = new URL(string);
		} catch (MalformedURLException e1) {
			e1.printStackTrace();
		}
		try {            
            HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
            httpURLConnection.setConnectTimeout(3000);     //设置连接超时时间
            httpURLConnection.setDoInput(true);            //打开输入流，以便从服务器获取数据
            httpURLConnection.setDoOutput(true);           //打开输出流，以便向服务器提交数据
            httpURLConnection.setRequestMethod("POST");    //设置以Post方式提交数据
            httpURLConnection.setUseCaches(false);         //使用Post方式不能使用缓存
            //设置请求体的类型是文本类型
            httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            //设置请求体的长度
            httpURLConnection.setRequestProperty("Content-Length", String.valueOf(b.length));
            //获得输出流，向服务器写入数据
            OutputStream outputStream = httpURLConnection.getOutputStream();
            outputStream.write(b);
            
            int response = httpURLConnection.getResponseCode();            //获得服务器的响应码
            if(response == HttpURLConnection.HTTP_OK) {
                InputStream inptStream = httpURLConnection.getInputStream();
                System.out.println(dealResponseResult(inptStream));        //处理服务器的响应结果
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
	}

	private byte[] getImageBytes(Bitmap bm) {
		ByteArrayOutputStream baos = new ByteArrayOutputStream();  
        bm.compress(Bitmap.CompressFormat.PNG, 100, baos);  
        return baos.toByteArray();  
	}

	public String dealResponseResult(InputStream inputStream) {
		String resultData = null; // 存储处理结果
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		byte[] data = new byte[1024];
		int len = 0;
		try {
			while ((len = inputStream.read(data)) != -1) {
				baos.write(data, 0, len);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
		resultData = new String(baos.toByteArray());
		return resultData;
	}
	

}