Question

如何在Android中使用DefaultHttpClient？

Answer 1

我建议阅读android-api提供的教程。

这是一个使用DefaultHttpClient的随机示例，通过examples-folder中的简单文本搜索找到。

编辑：样本来源并不打算显示某些内容。它只是请求了url的内容并将其存储为字符串。下面是一个显示它加载内容的示例（只要它是字符串数据，如html-，css-或javascript-文件）：

<强> main.xml中

  <?xml version="1.0" encoding="utf-8"?>
  <TextView xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/textview"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
  />

在你的应用的onCreate中添加：

  // Create client and set our specific user-agent string
  HttpClient client = new DefaultHttpClient();
  HttpGet request = new HttpGet("http://stackoverflow.com/opensearch.xml");
  request.setHeader("User-Agent", "set your desired User-Agent");

  try {
      HttpResponse response = client.execute(request);

      // Check if server response is valid
      StatusLine status = response.getStatusLine();
      if (status.getStatusCode() != 200) {
          throw new IOException("Invalid response from server: " + status.toString());
      }

      // Pull content stream from response
      HttpEntity entity = response.getEntity();
      InputStream inputStream = entity.getContent();

      ByteArrayOutputStream content = new ByteArrayOutputStream();

      // Read response into a buffered stream
      int readBytes = 0;
      byte[] sBuffer = new byte[512];
      while ((readBytes = inputStream.read(sBuffer)) != -1) {
          content.write(sBuffer, 0, readBytes);
      }

      // Return result from buffered stream
      String dataAsString = new String(content.toByteArray());

      TextView tv;
      tv = (TextView) findViewById(R.id.textview);
      tv.setText(dataAsString);

  } catch (IOException e) {
     Log.d("error", e.getLocalizedMessage());
  }

此示例现在加载给定URL的内容（示例中为stackoverflow的OpenSearchDescription），并将接收到的数据写入TextView。

Answer 2

以下是一般代码示例：

DefaultHttpClient defaultHttpClient = new DefaultHttpClient();

HttpGet method = new HttpGet(new URI("http://foo.com"));
HttpResponse response = defaultHttpClient.execute(method);
InputStream data = response.getEntity().getContent();
//Now we use the input stream remember to close it ....

Answer 3

来自Google Documentation

public DefaultHttpClient (ClientConnectionManager conman, HttpParams params)

从参数和连接管理器创建新的HTTP客户端。

参数
"conman"连接管理器，
"params"参数

public DefaultHttpClient (HttpParams params)
public DefaultHttpClient ()

如何在Android中使用DefaultHttpClient？

3 个答案: