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我需要將網頁源代碼提取爲Android中的字符串。我試圖用HttpClient，HttpGet和HttpResponse來做，但這種方法不起作用。我必須對這個方法的每個初始化都做try/catch，並且無論如何，應用程序部隊會關閉。如何在Android中獲取html源代碼？
public static String getHtmlSource(String webPage){
HttpClient client = new DefaultHttpClient();
URI url = null;
try {
url = new URI("http://www.kinopoisk.ru/film/581493");
} catch (URISyntaxException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
HttpGet request = new HttpGet(url);
HttpResponse response = null;
try {
response = client.execute(request);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String html = "";
InputStream in = null;
try {
in = response.getEntity().getContent();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder str = new StringBuilder();
String line = null;
try {
while((line = reader.readLine()) != null)
{
str.append(line);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
in.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
html = str.toString();
return html;
}
logcat的
09-18 19:28:07.989: W/dalvikvm(5708): threadid=1: thread exiting with uncaught exception (group=0x41f64300)
09-18 19:28:08.029: E/AndroidRuntime(5708): FATAL EXCEPTION: main
09-18 19:28:08.029: E/AndroidRuntime(5708): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.gavrilov.egor.movies/com.gavrilov.egor.movies.MoviesList}: android.os.NetworkOnMainThreadException
09-18 19:28:08.029: E/AndroidRuntime(5708): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
09-18 19:28:08.029: E/AndroidRuntime(5708): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
09-18 19:28:08.029: E/AndroidRuntime(5708): at android.app.ActivityThread.access$600(ActivityThread.java:130)
09-18 19:28:08.029: E/AndroidRuntime(5708): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
09-18 19:28:08.029: E/AndroidRuntime(5708): at android.os.Handler.dispatchMessage(Handler.java:99)
09-18 19:28:08.029: E/AndroidRuntime(5708): at android.os.Looper.loop(Looper.java:137)
09-18 19:28:08.029: E/AndroidRuntime(5708): at android.app.ActivityThread.main(ActivityThread.java:4745)
09-18 19:28:08.029: E/AndroidRuntime(5708): at java.lang.reflect.Method.invokeNative(Native Method)
09-18 19:28:08.029: E/AndroidRuntime(5708): at java.lang.reflect.Method.invoke(Method.java:511)
09-18 19:28:08.029: E/AndroidRuntime(5708): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
09-18 19:28:08.029: E/AndroidRuntime(5708): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-18 19:28:08.029: E/AndroidRuntime(5708): at dalvik.system.NativeStart.main(Native Method)
09-18 19:28:08.029: E/AndroidRuntime(5708): Caused by: android.os.NetworkOnMainThreadException
09-18 19:28:08.029: E/AndroidRuntime(5708): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
09-18 19:28:08.029: E/AndroidRuntime(5708): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
09-18 19:28:08.029: E/AndroidRuntime(5708): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
09-18 19:28:08.029: E/AndroidRuntime(5708): at java.net.InetAddress.getAllByName(InetAddress.java:214)
09-18 19:28:08.029: E/AndroidRuntime(5708): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
09-18 19:28:08.029: E/AndroidRuntime(5708): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
09-18 19:28:08.029: E/AndroidRuntime(5708): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
09-18 19:28:08.029: E/AndroidRuntime(5708): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
09-18 19:28:08.029: E/AndroidRuntime(5708): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
09-18 19:28:08.029: E/AndroidRuntime(5708): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
09-18 19:28:08.029: E/AndroidRuntime(5708): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
09-18 19:28:08.029: E/AndroidRuntime(5708): at com.gavrilov.egor.movies.ParseHtmlPage.getHtmlSource(ParseHtmlPage.java:32)
09-18 19:28:08.029: E/AndroidRuntime(5708): at com.gavrilov.egor.movies.MoviesList.onCreate(MoviesList.java:30)
09-18 19:28:08.029: E/AndroidRuntime(5708): at android.app.Activity.performCreate(Activity.java:5008)
09-18 19:28:08.029: E/AndroidRuntime(5708): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
09-18 19:28:08.029: E/AndroidRuntime(5708): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
它的工作原理和你可能做錯了。 – zapl
我會很感激知道我做錯了什麼。 –
如果您發佈給出錯誤的實際*代碼*，嘗試和幫助您會更容易。 – kaderud