从网页获取文本到字符串

我是Android的新手,我想将整个文本从网页转换为字符串。我发现了很多类似的问题,但是正如我所说的,我是Android的新手,我不知道如何在我的应用程序中使用它们。我遇到了错误。我只有一种方法设法使其起作用,它使用WebView和JavaScript,并且运行缓慢。有人可以告诉我其他方法或加快WebView的速度,因为我根本不使用它来查看内容。顺便说一句,我添加了以下代码来加速WebView

webView.getSettings().setJavaScriptEnabled(true); 

webView.getSettings().setBlockNetworkImage(true);

webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(false);

webView.getSettings().setPluginsEnabled(false);

webView.getSettings().setSupportMultipleWindows(false);

webView.getSettings().setSupportZoom(false);

webView.getSettings().setSavePassword(false);

webView.setVerticalScrollBarEnabled(false);

webView.setHorizontalScrollBarEnabled(false);

webView.getSettings().setAppCacheEnabled(false);

webView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);

并且,如果您知道其他比使用WebView更好,更快的解决方案,请给我提供主要活动的全部源代码,或者解释一下我应该在哪里编写它,以便不会出错。

回答:

用这个:

public class ReadWebpageAsyncTask extends Activity {

private TextView textView;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

textView = (TextView) findViewById(R.id.TextView01);

}

private class DownloadWebPageTask extends AsyncTask<String, Void, String> {

@Override

protected String doInBackground(String... urls) {

String response = "";

for (String url : urls) {

DefaultHttpClient client = new DefaultHttpClient();

HttpGet httpGet = new HttpGet(url);

try {

HttpResponse execute = client.execute(httpGet);

InputStream content = execute.getEntity().getContent();

BufferedReader buffer = new BufferedReader(

new InputStreamReader(content));

String s = "";

while ((s = buffer.readLine()) != null) {

response += s;

}

} catch (Exception e) {

e.printStackTrace();

}

}

return response;

}

@Override

protected void onPostExecute(String result) {

textView.setText(Html.fromHtml(result));

}

}

public void readWebpage(View view) {

DownloadWebPageTask task = new DownloadWebPageTask();

task.execute(new String[] { "http://www.google.com" });

}

}

main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="match_parent"

android:layout_height="match_parent"

>

<Button android:layout_height="wrap_content" android:layout_width="match_parent" android:id="@+id/readWebpage" android:onClick="readWebpage" android:text="Load Webpage"></Button>

<TextView android:id="@+id/TextView01" android:layout_width="match_parent" android:layout_height="match_parent" android:text="Example Text"></TextView>

</LinearLayout>

以上是 从网页获取文本到字符串 的全部内容, 来源链接: utcz.com/qa/405150.html

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