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POStringIndexOutOfBoundsException when switching page
 

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  1. POStringIndexOutOfBoundsException when switching page
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    <p>When I load a gridview (with adapter weekAdapter) from inside a fragment (weekFragment) for a viewpager, the first page loads fine. However, once I want to switch page, it gives a StringIndexOutOfBoundsException. I can't figure out what is wrong. In the LogCat nothing is reported, and the error only shows native methods, that I don't have modified. Please tell me how I can solve this.</p> <p>weekFragment.java:</p> <pre><code>package nl.siebeh.schoolmate; import java.util.ArrayList; import android.os.Bundle; import android.support.v4.app.Fragment; import android.util.Log; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; import android.view.LayoutInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.GridView; public class weekFragment extends Fragment { dbLayer db; String[] array = new String[60]; public String title; View v; /*@Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); GridView gridview = (GridView) v.findViewById(R.id.gridview); gridview.setAdapter(new weekAdapter(getActivity(), mContent)); }*/ public weekFragment newInstance(String title) { weekFragment fragment = new weekFragment(); fragment.title = title; return fragment; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { if (container == null) { return null; } db = new dbLayer(getActivity()); for(int i = 0; i &lt; 60; i++){ this.array[i] = String.valueOf(i); } ArrayList&lt;ArrayList&lt;Object&gt;&gt; result = new ArrayList&lt;ArrayList&lt;Object&gt;&gt;(); if(title == "leraren"){ result = db.getAllRowsAsArrays("weekTeacher", null); }else if(title == "locatie"){ result = db.getAllRowsAsArrays("weekLocation", null); }else if(title == "vakken"){ result = db.getAllRowsAsArrays("weekSubjects", null); } Log.i("SchoolMate", "Size of result: "+String.valueOf(result.size())); for(int position = 0; position &lt; result.size(); position++){ ArrayList&lt;Object&gt; row = result.get(position); int hour = Integer.valueOf(row.get(1).toString()).intValue(); int day = Integer.valueOf(row.get(0).toString()).intValue(); int pos = 6 * hour + day; this.array[pos] = row.get(position).toString(); } this.array[2] = getResources().getStringArray(R.array.days)[0]; this.array[3] = getResources().getStringArray(R.array.days)[1]; this.array[4] = getResources().getStringArray(R.array.days)[2]; this.array[5] = getResources().getStringArray(R.array.days)[3]; this.array[6] = getResources().getStringArray(R.array.days)[4]; for(int i = 1; i &lt; 10; i++){ this.array[i] = Integer.toString(i); } v = inflater.inflate(R.layout.week_fragment, container, false); GridView gridview = (GridView) v.findViewById(R.id.gridview); if(getActivity() == null){ Log.i("SchoolMate", "getActivty() returns null"); } StringBuilder sb = new StringBuilder(); for(int i = 0; i &lt; 60; i++){ sb.append("array["+i+"] = \""+array[i]+"\" \n"); } Log.i("SchoolMate", sb.toString()); gridview.setAdapter(new weekAdapter(getActivity(), array)); return gridview; } @Override public boolean onContextItemSelected(MenuItem item) { return super.onContextItemSelected(item); } @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { super.onCreateContextMenu(menu, v, menuInfo); } } </code></pre> <p>weekAdapter.java:</p> <pre><code>package nl.siebeh.schoolmate; import android.content.Context; import android.graphics.Color; import android.util.Log; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.TextView; public class weekAdapter extends BaseAdapter { public String[] strings; Context mContext; public weekAdapter(Context c, String[] s){ strings = s.clone(); mContext = c; Log.i("SchoolMate", "weekAdapter called"); } @Override public int getCount() { return 60; } @Override public Object getItem(int arg0) { return null; } @Override public long getItemId(int position) { return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { TextView tv; //if (convertView == null) { // if it's not recycled, initialize some attributes tv = new TextView(mContext); try{ tv.setText(strings[position]); }catch(ArrayIndexOutOfBoundsException e){ Log.i("SchoolMate", "Out of bounds; position = "+String.valueOf(position)); } tv.setBackgroundColor(Color.BLACK); tv.setTextColor(Color.WHITE); /*} else { tv = (TextView) convertView; }*/ return tv; } } </code></pre> <p>The error:</p> <pre><code>ViewRoot.draw(boolean) line: 1546 ViewRoot.performTraversals() line: 1258 ViewRoot.handleMessage(Message) line: 1859 ViewRoot(Handler).dispatchMessage(Message) line: 99 Looper.loop() line: 123 ActivityThread.main(String[]) line: 3683 Method.invokeNative(Object, Object[], Class, Class[], Class, int, boolean) line: not available [native method] Method.invoke(Object, Object...) line: 507 ZygoteInit$MethodAndArgsCaller.run() line: 839 ZygoteInit.main(String[]) line: 597 NativeStart.main(String[]) line: not available [native method] </code></pre> <p>EDIT: I determined that the else if(title == "vakken") is the cause. If it is commented out, it just works. The order doesn't matter, it is this clause that causes the error. Later today I will try to make just seperate ifs. </p>
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    1. COHi Swwizard! How can you tell for sure that your error is related to StringIndexOutOfBoundsException? You should perhaps `Log.d()` your execution flow to identify on which line of your source the issue takes place. Also log the value of the arguments to the Native function call.
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    2. COYou should post the stack with the *native* methods. This could indicate what you did wrong before and help others to help you. This is not the full stacktrace you posted, right?
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    3. CO@Laurent' Above the stack there it says StringIndexOutOfBoundsException. Maybe it is StringArrayIndexOutOfBoundsException, can't check that now. I will try Log.d, have you a link on how to use it?
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