Android笔记：Android设备获取公网IP

最新推荐文章于 2025-03-08 16:23:57 发布

陈大宝

最新推荐文章于 2025-03-08 16:23:57 发布

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分类专栏：移动开发文章标签： android textview 需求 class 电视

本文链接：https://blog.youkuaiyun.com/xiaoyu940601/article/details/70157772

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需求来的太突然，上代码做记录，完美可运行


public class MainActivity extends AppCompatActivity {

    private TextView tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv = (TextView) findViewById(R.id.tv);
        new Thread(new Runnable() {
            @Override
            public void run() {
                URL infoUrl = null;
                InputStream inStream = null;
                String line = "";
                try {
                    infoUrl = new URL("http://pv.sohu.com/cityjson?ie=utf-8");
                    URLConnection connection = infoUrl.openConnection();
                    HttpURLConnection httpConnection = (HttpURLConnection) connection;
                    int responseCode = httpConnection.getResponseCode();
                    if (responseCode == HttpURLConnection.HTTP_OK) {
                        inStream = httpConnection.getInputStream();
                        BufferedReader reader = new BufferedReader(new InputStreamReader(inStream, "utf-8"));
                        StringBuilder strber = new StringBuilder();
                        while ((line = reader.readLine()) != null)
                            strber.append(line + "\n");
                        inStream.close();
                        // 从反馈的结果中提取出IP地址
                        int start = strber.indexOf("{");
                        int end = strber.indexOf("}");
                        String json = strber.substring(start, end + 1);
                        if (json != null) {
                            try {
                                JSONObject jsonObject = new JSONObject(json);
                                line = jsonObject.optString("cip");
                            } catch (JSONException e) {
                                e.printStackTrace();
                            }

                        }
                        tv.setText("ip===="+line);
                    }
                } catch (MalformedURLException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                tv.setText("ip===="+line);
            }
        }).start();

    }

}