I am new to android programming. I tried to execute a app from one of the tutorials and it is showing runtime error. If it runs highscores menu. Application closed. Below are the error messages from logcat and the activity file. Appreciate your help. Thanks in advance.
ERROR
HighScores.java
activity_high_scores_screen.xml
RevHighScoreAdapter.java
ERROR
HTML:
12-15 03:49:51.124: I/HighScores(1115): getScores() called
12-15 03:49:51.154: I/HighScores(1115): getScores() no scores found
12-15 03:49:51.354: I/Reversi, RevHSCustAd getView called(1115): position = 0
12-15 03:49:51.444: I/Reversi, RevHSCustAd getView called(1115): position = 0
12-15 03:49:51.454: D/AndroidRuntime(1115): Shutting down VM
12-15 03:49:51.454: W/dalvikvm(1115): threadid=1: thread exiting with uncaught exception (group=0xb2a40ba8)
12-15 03:49:51.594: D/dalvikvm(1115): GC_FOR_ALLOC freed 447K, 11% free 4353K/4880K, paused 89ms, total 100ms
12-15 03:49:51.714: E/AndroidRuntime(1115): FATAL EXCEPTION: main
12-15 03:49:51.714: E/AndroidRuntime(1115): Process: uk.co.flumeland.reversi, PID: 1115
12-15 03:49:51.714: E/AndroidRuntime(1115): java.lang.NullPointerException
12-15 03:49:51.714: E/AndroidRuntime(1115): at uk.co.flumeland.reversi.RevHighScoreAdapter.getView(RevHighScoreAdapter.java:68)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.widget.AbsListView.obtainView(AbsListView.java:2263)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.widget.ListView.measureHeightOfChildren(ListView.java:1263)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.widget.ListView.onMeasure(ListView.java:1175)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.View.measure(View.java:16497)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.View.measure(View.java:16497)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.View.measure(View.java:16497)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
12-15 03:49:51.714: E/AndroidRuntime(1115): at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:327)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.View.measure(View.java:16497)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
12-15 03:49:51.714: E/AndroidRuntime(1115): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2291)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.View.measure(View.java:16497)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1916)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1113)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1295)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5670)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.Choreographer.doCallbacks(Choreographer.java:574)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.Choreographer.doFrame(Choreographer.java:544)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.os.Handler.handleCallback(Handler.java:733)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.os.Handler.dispatchMessage(Handler.java:95)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.os.Looper.loop(Looper.java:136)
12-15 03:49:51.714: E/AndroidRuntime(1115): at android.app.ActivityThread.main(ActivityThread.java:5017)
12-15 03:49:51.714: E/AndroidRuntime(1115): at java.lang.reflect.Method.invokeNative(Native Method)
12-15 03:49:51.714: E/AndroidRuntime(1115): at java.lang.reflect.Method.invoke(Method.java:515)
12-15 03:49:51.714: E/AndroidRuntime(1115): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
12-15 03:49:51.714: E/AndroidRuntime(1115): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
12-15 03:49:51.714: E/AndroidRuntime(1115): at dalvik.system.NativeStart.main(Native Method)
12-15 03:49:51.864: W/CursorWrapperInner(1115): Cursor finalized without prior close()
12-15 03:49:54.184: I/Process(1115): Sending signal. PID: 1115 SIG: 9
Java:
package uk.co.flumeland.reversi;
import java.util.ArrayList;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Typeface;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class HighScores extends Activity {
private Score[] score = new Score[10];
private ListView scoreList;
private ContentResolver cr;
private RevHighScoreAdapter rHSad;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_high_scores_screen);
TextView title = (TextView) findViewById(R.id.title_textview);
scoreList = (ListView) findViewById(R.id.high_score_list);
Typeface tf = Typeface.createFromAsset(getAssets(),
"fonts/tattoowoo_naughty-nights/Naughty Nights.ttf");
title.setTypeface(tf);
getScores();
loadScores();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu, menu);
return true;
}
/**
* Loads scores into the score ArrayList
*/
public void getScores() {
Log.i("HighScores", "getScores() called");
cr = getContentResolver();
Cursor c = cr.query(HighScoresData.CONTENT_URI, null, null, null,
HighScoresData.KEY_SCORE + " DESC");
// looping through all rows and adding to list
int numScores = c.getCount();
int i = 0;
if (c != null && c.getCount() > 0) {
c.moveToFirst();
do {
Log.i("HighScores", "getScores() = "
+ c.getString(HighScoresData.NAME_COLUMN) + " "
+ c.getString(HighScoresData.PHOTO_COLUMN) + " "
+ c.getInt(HighScoresData.SCORE_COLUMN) + " " + i);
score[i] = new Score(c.getString(HighScoresData.NAME_COLUMN),
c.getString(HighScoresData.PHOTO_COLUMN),
c.getInt(HighScoresData.SCORE_COLUMN));
//score[i] = sc;
i++;
} while (c.moveToNext() && i < 10);
} else {
Log.i("HighScores", "getScores() no scores found");
}
}
private void loadScores() {
rHSad = new RevHighScoreAdapter(this, score);
// Set the Adapter to GridView
scoreList.setAdapter(rHSad);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_settings:
startActivity(new Intent(this, Settings.class));
return true;
case R.id.action_how_to:
startActivity(new Intent(this, HowTo.class));
return true;
case R.id.action_high_scores:
startActivity(new Intent(this, HighScores.class));
return true;
}
return false;
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
finish();
}
}activity_high_scores_screen.xml
HTML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/bkgrnd_col"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin" >
<TextView
android:id="@+id/title_textview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="@string/high_scores"
android:textColor="@color/text_col_hd"
android:textSize="@dimen/main_title"
android:textStyle="bold" />
<TableRow
android:id="@+id/tableRow1"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
</TableRow>
<TableRow
android:id="@+id/tableRow2"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/hs_pic_t"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="2"
android:text="PIC"
android:textColor="@color/text_general" />
<TextView
android:id="@+id/hs_names_t"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="NAME"
android:textColor="@color/text_general" />
<TextView
android:id="@+id/hs_scores_t"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="2"
android:text="SCORE"
android:textColor="@color/text_general" />
</TableRow>
<ListView
android:id="@+id/high_score_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@color/text_general" >
</ListView>
</LinearLayout>RevHighScoreAdapter.java
Java:
package uk.co.flumeland.reversi;
import java.util.ArrayList;
import java.lang.String;
import android.app.Activity;
import android.content.Context;
import android.net.Uri;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class RevHighScoreAdapter extends ArrayAdapter {
private Score[] scores;
private Context context;
// Constructor
public RevHighScoreAdapter(Context context, Score[] score){
super(context, 0);
scores = score;
this.context = context;
}
@Override
public int getCount() {
// length of list
return scores.length;
}
@Override
public Object getItem(int position) {
// length of list
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
Log.i("Reversi, RevHSCustAd getView called", "position = " + position );
if (row == null) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
row = inflater.inflate(R.layout.high_scores_listview_row, parent, false);
}
TextView nameTV = (TextView) row.findViewById(R.id.hs_player_name_lv);
ImageView photoIV = (ImageView) row.findViewById(R.id.hs_player_image_lv);
TextView scoreTV = (TextView) row.findViewById(R.id.hs_score_lv);
Log.i("Reversi, RevHSCustAd getView called", "position = " + position );
//if (scores[position].getPhotolink() != null) {
//photoIV.setImageURI(Uri.parse(scores[position].getPhotolink()));
//} else {
//photoIV.setImageResource(R.drawable.social_add_person);
//}
nameTV.setText(scores[position].getName());
Log.i("Reversi, RevHSCustAd getView called", "position = " + position );
scoreTV.setText(String.valueOf(scores[position].getScore()));
return row;
}
}
