我正在尝试创建一个应用程序，从api中提取这些Ron Swanson引号并将其显示在片段中。当片段被刷过时，应用程序将转到另一个片段并显示新的引用。这个过程应该无限期重复。
相反，该应用加载到空白屏幕。我在片段上放置了一个按钮和TextView，每个按钮都有初始文本以确定它是否有负载，但是什么也没有出现。
P.S。：您可能还会注意到一些滑稽的变量名称和注释。我显然没有考虑到写作时我可能需要帮助（它只是一个学习的个人应用程序）。
P.P.S。：老实说，我不确定该网站是否仍然存在，但这不应该对此产生任何影响。感谢任何可以提供帮助的人。下面是应用2）activity_main.xml文件的单个java文件。
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public class MainActivity extends FragmentActivity {
@SuppressWarnings("deprecation")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//
ViewPager pagingRon = (ViewPager) findViewById(R.id.pager);
PagerAdapter RonsPagerAdapter = new CustomPagerAdapter(getSupportFragmentManager());
pagingRon.setAdapter(RonsPagerAdapter);
pagingRon.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrollStateChanged(int arg0) {
// TOxDO Auto-generated method stub
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
@Override
public void onPageSelected(int arg0) {
// TODO Auto-generated method stub
}
});
//Initial AsyncTask for setting up first quote of the Great Swan
RonSwanSetup ronSwansonOG = new RonSwanSetup();
ronSwansonOG.execute();
}
private class RonSwanSetup extends AsyncTask<Void, String, Void> {
@Override
protected Void doInBackground(Void... Socialism) {
String Ronquoteson = ""; //Ron's wonderful first quote
String Rondotcom = "http://ron-swanson-quotes.herokuapp.com/quotes"; //the website for fetching Ron's wonderful quotes
String[] Ronsquotes = new String[1]; //Ron only speaks seldomly, which is the pinnacle of wisdom
try {
URL Ronsurl = new URL(Rondotcom);
HttpURLConnection Ronsconnection = (HttpURLConnection) Ronsurl.openConnection();
BufferedReader thanksRon = new BufferedReader(new InputStreamReader(Ronsconnection.getInputStream()));
String current;
while((current = thanksRon.readLine()) != null)
{
Ronquoteson += current;
}
Ronsquotes[0] = Ronquoteson;
} catch (Exception sorryRon) {
Ronsquotes[0] = "The app appears unable to do even the SIMPLEST THINGS CORRECTLY - Maybe try restarting it?";
sorryRon.printStackTrace();
}
publishProgress(Ronsquotes);
return null;
}
protected void onProgressUpdate(String... Ronsquote) {
TextView RonsText = (TextView) findViewById(R.id.text);
String RonQouteson = Ronsquote[0];
RonsText.setText("Not Ron's Quote");//For testing
}
}
public class CustomPagerAdapter extends FragmentPagerAdapter {
public CustomPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
// This method returns the fragment associated with
// the specified position.
// It is called when the Adapter needs a fragment
// and it does not exist.
public Fragment getItem(int position) {
// Create fragment object
RonFragSon fragment = new RonFragSon();
// Attach some data to it that we'll
// use to populate our fragment layouts
Bundle args = new Bundle();
args.putInt("page_position", position + 1);
// Set the arguments on the fragment
// that will be fetched
fragment.setArguments(args);
return fragment;
}
@Override
public int getCount() {
return 3;
}
}
public class RonFragSon extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout resource that'll be returned
View rootView = inflater.inflate(R.layout.swansons_fragment, container, false);
// Get the arguments that was supplied when
// the fragment was instantiated in the
// CustomPagerAdapter
Bundle args = getArguments();
((TextView) rootView.findViewById(R.id.text)).setText("Page");
return rootView;
}
}
}
<HorizontalScrollView
android:id="@+id/horizontal_Swangrid"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="40"
xmlns:android="http://schemas.android.com/apk/res/android">
<!-- I don't think this is necessary, but don't want to get rid of it in case I'm wrong
<LinearLayout
android:id="@+id/Swanson_cant_container"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal" >
<TextView
android:id="@+id/RonSwan1stQuote"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:id="@+id/RonSwan2ndQuote"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:id="@+id/RonSwan3rdQuote"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
-->
<android.support.v4.view.ViewPager
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</HorizontalScrollView>