Java 从internet获取文本

如果你去-你可以看到它给ip。如果刷新，它将提供不同的端口

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我怎样才能将IP接入android？我不知道如何让它每5秒钟更新一次，但现在我想知道如何把它放到我的手机里。我想将其显示为文本视图：）。

编辑：固定代码

尝试一个（示例的简化版本）：

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@拖地雪橇解决方案对我不起作用，因此我的解决方案如下：

public class TestActivity extends Activity {

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    TextView tv = (TextView) findViewById(R.id.textView1);
    String ip = "";
    final DefaultHttpClient httpClient = new DefaultHttpClient();
    final HttpGet httpGet = new HttpGet("http://www.elven.ee/ip/");
    try {
        final HttpResponse response = httpClient.execute(httpGet);
        if (response.getStatusLine().getStatusCode() == 200) {
            ip = getString(response);
        }
    } catch (final ClientProtocolException e) {
        e.printStackTrace();
    } catch (final IOException e) {
        e.printStackTrace();
    }
    tv.setText(ip);
}

private static String getString(HttpResponse response) {
    final HttpEntity retEntity = response.getEntity();
    if (retEntity != null) {
        InputStream instream = null;
        try {
            instream = retEntity.getContent();
        } catch (final IllegalStateException ise) {
            ise.printStackTrace();
        } catch (final IOException ioe) {
            ioe.printStackTrace();
        }
        final String result = convertStreamToString(instream);
        return result;
    } else {
        return "";
    }
}

private static String convertStreamToString(final InputStream is) {
    final BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    final StringBuilder sb = new StringBuilder();

    String line = null;
    try {
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
    } catch (final IOException ioe) {
        ioe.printStackTrace();
    } finally {
        try {
            is.close();
        } catch (final IOException ioe) {
            ioe.printStackTrace();
        }
    }
    return sb.toString().trim();
}
}

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别忘了将

添加到您的清单文件中。哇，它成功了！非常感谢：）！我现在需要正确地检查它来理解它：D！你知道如何将其设置为每5秒刷新一次吗：/？@Elven你可以在android开发者资源中找到一个关于计时器的好教程：它给出错误未处理的异常类型MalformedURLException和IOException:/@Elven我知道你已经选择了正确的答案，但是我已经更正了代码，所以现在应该可以正常工作了。好的，谢谢：）。我也要试试。我也可以通过它来测试和学习！这对我来说总是一样的IP。仅限

后面的数字每次呼叫都会更改，但这不是IP的一部分（可能是端口号？）哦，是的，这就是我的意思，端口会更改：）。我的错误。现在我只需要找出我他妈的怎么做循环：（。
public class TestActivity extends Activity {

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    TextView tv = (TextView) findViewById(R.id.textView1);
    String ip = "";
    final DefaultHttpClient httpClient = new DefaultHttpClient();
    final HttpGet httpGet = new HttpGet("http://www.elven.ee/ip/");
    try {
        final HttpResponse response = httpClient.execute(httpGet);
        if (response.getStatusLine().getStatusCode() == 200) {
            ip = getString(response);
        }
    } catch (final ClientProtocolException e) {
        e.printStackTrace();
    } catch (final IOException e) {
        e.printStackTrace();
    }
    tv.setText(ip);
}

private static String getString(HttpResponse response) {
    final HttpEntity retEntity = response.getEntity();
    if (retEntity != null) {
        InputStream instream = null;
        try {
            instream = retEntity.getContent();
        } catch (final IllegalStateException ise) {
            ise.printStackTrace();
        } catch (final IOException ioe) {
            ioe.printStackTrace();
        }
        final String result = convertStreamToString(instream);
        return result;
    } else {
        return "";
    }
}

private static String convertStreamToString(final InputStream is) {
    final BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    final StringBuilder sb = new StringBuilder();

    String line = null;
    try {
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
    } catch (final IOException ioe) {
        ioe.printStackTrace();
    } finally {
        try {
            is.close();
        } catch (final IOException ioe) {
            ioe.printStackTrace();
        }
    }
    return sb.toString().trim();
}
}