public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> {
private List<String> mTitles;
public RecyclerAdapter(List<String> titles) {
mTitles = titles;
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView mTextView;
public ViewHolder(View v) {
super(v);
mTextView = (TextView) v.findViewById(R.id.rw_title);
}
}
@Override
public RecyclerAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycler_item, parent, false);
ViewHolder vh = new ViewHolder(v);
return vh;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.mTextView.setText(mTitles.get(position));
}
@Override
public int getItemCount() {
return mTitles.size();
}
}06-20 17:43:20.040 2268-2268/? I/zygote64: Late-enabling -Xcheck:jni
06-20 17:43:20.064 2268-2268/? I/zygote64: Reinit property: dalvik.vm.checkjni= false
06-20 17:43:20.086 2268-2268/? D/ActivityThread: ActivityThread,attachApplication
06-20 17:43:20.204 2268-2268/ru.stalkerweb.recycleviewsw D/HwFLClassLoader: get used feature list :/feature/used-list failed!
06-20 17:43:20.204 2268-2268/ru.stalkerweb.recycleviewsw D/HwFLClassLoader: USE_FEATURE_LIST had not init!
06-20 17:43:20.244 2268-2268/ru.stalkerweb.recycleviewsw E/MemoryLeakMonitorManager: MemoryLeakMonitor.jar is not exist!
06-20 17:43:20.247 2268-2268/ru.stalkerweb.recycleviewsw E/Minikin: Could not get cmap table size!
06-20 17:43:20.283 2268-2268/ru.stalkerweb.recycleviewsw I/HwCust: Constructor found for class android.app.HwCustActivityImpl
06-20 17:43:20.284 2268-2268/ru.stalkerweb.recycleviewsw D/HwCust: Create obj success use class android.app.HwCustActivityImpl
06-20 17:43:20.293 2268-2268/ru.stalkerweb.recycleviewsw V/HwPolicyFactory: : success to get AllImpl object and return....
06-20 17:43:20.299 2268-2268/ru.stalkerweb.recycleviewsw I/HwCust: Constructor found for class android.app.HwCustHwWallpaperManagerImpl
06-20 17:43:20.299 2268-2268/ru.stalkerweb.recycleviewsw D/HwCust: Create obj success use class android.app.HwCustHwWallpaperManagerImpl
06-20 17:43:20.334 2268-2268/ru.stalkerweb.recycleviewsw V/HwWidgetFactory: : successes to get AllImpl object and return....
06-20 17:43:20.338 2268-2268/ru.stalkerweb.recycleviewsw V/ActivityThread: ActivityThread,callActivityOnCreate
06-20 17:43:20.429 2268-2268/? D/HwRTBlurUtils: check blur style for HwPhoneWindow-, themeResId : 0x7f0900a8, context : ru.stalkerweb.recycleviewsw.MainActivity@ef3f5b8, Nhwext : 0, get Blur : disable with , null
06-20 17:43:20.431 2268-2268/? D/HwRTBlurUtils: check blur style for HwPhoneWindow-, themeResId : 0x7f0900a8, context : ru.stalkerweb.recycleviewsw.MainActivity@ef3f5b8, Nhwext : 0, get Blur : disable with , null
06-20 17:43:20.486 2268-2268/? D/CubicBezierInterpolator: CubicBezierInterpolator mControlPoint1x = 0.23, mControlPoint1y = 0.06, mControlPoint2x = 0.09, mControlPoint2y = 0.97
06-20 17:43:20.487 2268-2268/? D/CubicBezierInterpolator: CubicBezierInterpolator mControlPoint1x = 0.6, mControlPoint1y = 0.9, mControlPoint2x = 0.8, mControlPoint2y = 1.0
06-20 17:43:20.489 2268-2268/? D/CubicBezierInterpolator: CubicBezierInterpolator mControlPoint1x = 0.23, mControlPoint1y = 0.06, mControlPoint2x = 0.09, mControlPoint2y = 0.97
06-20 17:43:20.490 2268-2268/? D/CubicBezierInterpolator: CubicBezierInterpolator mControlPoint1x = 0.6, mControlPoint1y = 0.9, mControlPoint2x = 0.8, mControlPoint2y = 1.0
06-20 17:43:20.512 2268-2268/? W/Utils: Utils_isSuperResolutionSupport [load libai_client.so failed]
06-20 17:43:20.526 2268-2268/? D/AndroidRuntime: Shutting down VM
06-20 17:43:20.530 2268-2268/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: ru.stalkerweb.recycleviewsw, PID: 2268
java.lang.RuntimeException: Unable to start activity ComponentInfo{ru.stalkerweb.recycleviewsw/ru.stalkerweb.recycleviewsw.MainActivity}: java.lang.NullPointerException: Attempt to invoke interface method 'int java.util.List.size()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3194)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3302)
at android.app.ActivityThread.-wrap12(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1891)
at android.os.Handler.dispatchMessage(Handler.java:108)
at android.os.Looper.loop(Looper.java:166)
at android.app.ActivityThread.main(ActivityThread.java:7425)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:245)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:921)
Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'int java.util.List.size()' on a null object reference
at ru.stalkerweb.recycleviewsw.MainActivity.onCreate(MainActivity.java:51)
at android.app.Activity.performCreate(Activity.java:7372)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1218)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3147)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3302)
at android.app.ActivityThread.-wrap12(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1891)
at android.os.Handler.dispatchMessage(Handler.java:108)
at android.os.Looper.loop(Looper.java:166)
at android.app.ActivityThread.main(ActivityThread.java:7425)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:245)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:921)
06-20 17:43:20.543 2268-2268/? I/Process: Sending signal. PID: 2268 SIG: 9
public class MainActivity extends AppCompatActivity {
URL url;
List<String> titles;
ArrayList<String> links;
ArrayList<String> description;
ArrayList<String> pubDate;
ArrayList<String> author;
ArrayList<String> category;
String HHMurl= "https://stalkerweb.ru/feed";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
RecyclerView mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
mRecyclerView.setHasFixedSize(false);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(mLayoutManager);
RecyclerView.Adapter mAdapter = new RecyclerAdapter(titles);
mRecyclerView.setAdapter(mAdapter);
try{
titles = new ArrayList<>();
links = new ArrayList<>();
description = new ArrayList<>();
pubDate = new ArrayList<>();
author = new ArrayList<>();
category = new ArrayList<>();
RecycleClick.addTo(mRecyclerView).setOnItemClickListener(new RecycleClick.OnItemClickListener() {
@Override
public void onItemClicked(RecyclerView recyclerView, int position, View v) {
//to do something
}
});
new ProcessInBackground().execute();
} catch(Exception e){
//to do something
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public InputStream getInputStream (URL url)
{
try {
return url.openConnection().getInputStream();
} catch (IOException e) {
return null;
}
}
private class ProcessInBackground extends AsyncTask<Integer, Void, Exception> {
ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);
Exception exception = null;
@Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog.setMessage("Загрузка...");
progressDialog.show();
}
@Override
protected Exception doInBackground(Integer... params) {
try {
url = new URL(HHMurl);
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(false);
XmlPullParser xpp = factory.newPullParser();
xpp.setInput(getInputStream(url), "UTF_8");
boolean insideItem = false;
int eventType = xpp.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
if (eventType == XmlPullParser.START_TAG) {
if (xpp.getName().equalsIgnoreCase("item")) {
insideItem = true;
} else if (xpp.getName().equalsIgnoreCase("title")) {
if (insideItem) {
titles.add(xpp.nextText());
}
} else if (xpp.getName().equalsIgnoreCase("link")) {
if (insideItem) {
links.add(xpp.nextText());
}
} else if (xpp.getName().equalsIgnoreCase("content:encoded")) {
if (insideItem) {
description.add(xpp.nextText());
}
} else if (xpp.getName().equalsIgnoreCase("pubDate")) {
if (insideItem) {
pubDate.add(xpp.nextText());
}
} else if (xpp.getName().equalsIgnoreCase("dc:creator")) {
if (insideItem) {
author.add(xpp.nextText());
}
} else if (xpp.getName().equalsIgnoreCase("category")) {
if (insideItem) {
category.add(xpp.nextText());
}
}
} else if (eventType == XmlPullParser.END_TAG && xpp.getName().equalsIgnoreCase("item")) {
insideItem = false;
}
eventType = xpp.next();
}
} catch (XmlPullParserException | IOException e) {
exception = e;
}
return exception;
}
}}
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