当我将在线文本放在TextView中时，应用程序崩溃
[英]App Crash when I put Online text in TextView
问题描述
My App crashes when I run this code: 
运行以下代码时，我的应用程序崩溃：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_biografie);
setTitle("Biografie");
try {
// Create a URL for the desired page
URL url = new URL("http://xxx.nl/api/biografie.php?dataid=998");
// Read all the text returned by the server
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
String str;
while ((str = in.readLine()) != null) {
// str is one line of text; readLine() strips the newline character(s)
TextView text = (TextView)findViewById(R.id.biografieText);
text.setText(str);
}
in.close();
} catch (MalformedURLException e) {
} catch (IOException e) {
}
}
This is my Logcat output: 这是我的Logcat输出：
03-26 12:35:16.900: E/AndroidRuntime(30127): FATAL EXCEPTION: main 03-26 12:35:16.900: E/AndroidRuntime(30127): java.lang.RuntimeException: Unable to start activity ComponentInfo{nl.appone.artistone.reneevanginkel/nl.appone.artistone.reneevanginkel.Biografie}: android.os.NetworkOnMainThreadException 03-26 12:35:16.900: E/AndroidRuntime(30127): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956) 03-26 12:35:16.900: E/AndroidRuntime(30127): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 03-26 12:35:16.900: E/AndroidRuntime(30127): at android.app.ActivityThread.access$600(ActivityThread.java:123) 03-26 12:35:16.900: E/AndroidRuntime(30127): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 03-26 12:35:16.900: E/AndroidRuntime(30127): at android.os.Handler.dispatchMessage(Handler.java:99) 03-26 12:35:16.900: E/AndroidRuntime(30127): at android.os.Looper.loop(Looper.java:137) 03-26 12:35:16.900: E/AndroidRuntime(3
What can I do to put the Text from the web into the TextView? 我该怎么做才能将网络上的文本放入TextView？ It's a PHP script what have an output with a biography. 这是一个PHP脚本，具有带有传记的输出。
Thanks in Regard! 谢谢Regard！
3 个解决方案
解决方案1
1 已采纳 2013-03-26 11:51:41
this will be a better practice, using asyncronous task 使用异步任务，这将是更好的做法
AsyncronousTask atask = new AsyncronousTask();
atask.execute("ur url here");
String res=atask.get();
//Asyncronous taks class goes like
public class AsyncronousTask extends AsyncTask<String, Void, String> {
String response;
Activity c;
//private ProgressDialog dialog;
//String title,msg;
@Override
protected String doInBackground(String... urls) {
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;
}
}
解决方案2
0 2013-03-26 11:44:25
use this code, you will get response in return of this method call then you can set that on textView 使用此代码，您将获得响应以返回此方法调用，然后可以在textView上进行设置
public static String HitServerGET(String URL) { 公共静态字符串HitServerGET（String URL）{
String result = null;
InputStream is = null;
StringBuilder sb = null;
// http post
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(URL);
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
} catch (Exception e) {
Log.e("log_tag", "Error in http connection" + e.toString());
}
// convert response to string
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
sb = new StringBuilder();
sb.append(reader.readLine() + "\n");
String line = "0";
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result = sb.toString();
} catch (Exception e) {
Log.e("log_tag", "Error converting result " + e.toString());
}
return result;
解决方案3
0 2013-03-26 11:57:27
In the onPostExecute, you can set the text in your TextView. 在onPostExecute中，可以在TextView中设置文本。
I re-use the HitServerGET function of Saad Khokhar 我重用了Saad Khokhar的HitServerGET函数
This code can be put in your onCreate. 此代码可以放在您的onCreate中。
final URL url = new URL("http://xxx.nl/api/biografie.php?dataid=998");
new AsyncTask<String, String, String>()
{
String text=null;
@Override
protected String doInBackground(String... params)
{
text = HitServerGET(url)
}
@Override
protected void onPostExecute(String ret)
{
((TextView)findViewById(R.id.biografieText)).setText(text);
}
}.execute();
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