在 Android 中读取 URL 的内容
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/2075836/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Read contents of a URL in Android
提问by user200565
I'm new to android and I'm trying to figure out how to get the contents of a URL as a String. For example if my URL is http://www.google.com/I want to get the HTML for the page as a String. Could anyone help me with this?
我是 android 新手，我正在尝试弄清楚如何将 URL 的内容作为字符串获取。例如，如果我的 URL 是http://www.google.com/，我想以字符串的形式获取页面的 HTML。有人可以帮我解决这个问题吗？
回答by Drew
From the Java Docs : readingURL
来自 Java 文档：readingURL
URL yahoo = new URL("http://www.yahoo.com/");
BufferedReader in = new BufferedReader(
new InputStreamReader(
yahoo.openStream()));
String inputLine;
while ((inputLine = in.readLine()) != null)
System.out.println(inputLine);
in.close();
Instead of writing each line to System.outjust append it to a string.
而不是写每一行System.out只是将它附加到一个字符串。
回答by detman
You can open a stream and read and append each line to a string - remember to wrap everything with a try-catch block - hope it helps!
您可以打开一个流并读取每一行并将其附加到一个字符串中 - 请记住用 try-catch 块包装所有内容 - 希望它有所帮助！
String fullString = "";
URL url = new URL("http://example.com");
BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream()));
String line;
while ((line = reader.readLine()) != null) {
fullString += line;
}
reader.close();
回答by live-love
You can put it in an AsyncTask like this:
你可以像这样把它放在一个 AsyncTask 中：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
try {
new Main2Activity.MyTask().execute(this);
} catch (Exception e) {
e.printStackTrace();
}
}
private static class MyTask extends AsyncTask<Object, Void, String> {
Main2Activity activity;
@Override
protected String doInBackground(Object... params) {
activity = (Main2Activity)params[0];
try {
StringBuilder sb = new StringBuilder();
URL url = new URL("http://www.google.com/");
BufferedReader in;
in = new BufferedReader(
new InputStreamReader(
url.openStream()));
String inputLine;
while ((inputLine = in.readLine()) != null)
sb.append(inputLine);
in.close();
return sb.toString();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String str) {
//Do something with result string
WebView webView = activity.findViewById(R.id.web_view);
webView.loadData(str, "text/html; charset=UTF-8", null);
}
}
