不知何故，当我编译时，我一直走出界限。我知道我的数组中有10个元素。我已经尝试将确切的数量作为迭代值和数组的长度。但我仍然会过去。
package com.hb.examples;
import java.util.Locale;
import android.annotation.SuppressLint;
import android.app.ListActivity;
import android.content.Context;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SectionIndexer;
import android.widget.TextView;
import android.widget.Toast;
import com.hb.examples.pinnedsection.R;
import com.hb.views.PinnedSectionListView;
import com.hb.views.PinnedSectionListView.PinnedSectionListAdapter;
public class PinnedSectionListActivity extends ListActivity implements OnClickListener {
static class SimpleAdapter extends ArrayAdapter<Item> implements PinnedSectionListAdapter {
private static final int[] COLORS = new int[] {
R.color.green_light,
R.color.orange_light,
R.color.blue_light,
R.color.red_light };
public SimpleAdapter(Context context, int resource, int textViewResourceId) {
super(context, resource, textViewResourceId);
//final int sectionsNumber = 'Z' - 'A' + 1;
final int sectionsNumber = 'Z' - 'A' + 1;
prepareSections(sectionsNumber);
int sectionPosition = 0, listPosition = 0;
for (int i=0; i< sectionsNumber; i++) {
String title = null;
final String []country = {
"Korean", "Japanese", "Chinese", "Cambodian", "Loas", "Taiwamese"
};
final String [] CATEGORY = {
"Language",
"sports",
"love",
"luxury",
"vacation",
"games",
"home",
"travel",
"electronics",
"movies",
};
switch (('A' + i)) {
case ('A' + 0):
title = country[0];
break;
case ('A' + 1):
title = country[1];
break;
case ('A' + 2):
title = country[2];
break;
case ('A' + 3):
title = country[3];
break;
case ('A' + 4):
title = country[4];
break;
case ('A' + 5):
title = country[5];
break;
default:
break;
}
//Create a new Item class with section header and Name
Item section = new Item(Item.SECTION, title + i);
//Item section = new Item(Item.SECTION, String.valueOf((char)('A' + i)));
section.sectionPosition = sectionPosition;
section.listPosition = listPosition++;
onSectionAdded(section, sectionPosition);
add(section);
final int itemsNumber = CATEGORY.length;
//(int) Math.abs((Math.cos(2f*Math.PI/3f * sectionsNumber / (i+1f)) * 25f));
// For loop to iterate the exact number of itemNumber
for (int j = 0;j < CATEGORY.length;j++) {
//Item item = new Item(Item.ITEM, section.text.toUpperCase(Locale.KOREA) + " - " + j);
Item item = new Item(Item.ITEM, CATEGORY[i]);
item.sectionPosition = sectionPosition;
item.listPosition = listPosition++;
add(item);
}
sectionPosition++;
}
}
这是logcat输出。
03-03 22:15:55.075: E/AndroidRuntime(19731): FATAL EXCEPTION: main
03-03 22:15:55.075: E/AndroidRuntime(19731): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.hb.examples.pinnedsection/com.hb.examples.PinnedSectionListActivity}: java.lang.ArrayIndexOutOfBoundsException: length=10; index=10
03-03 22:15:55.075: E/AndroidRuntime(19731): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2266)
03-03 22:15:55.075: E/AndroidRuntime(19731): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2316)
03-03 22:15:55.075: E/AndroidRuntime(19731): at android.app.ActivityThread.access$600(ActivityThread.java:150)
03-03 22:15:55.075: E/AndroidRuntime(19731): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1298)
03-03 22:15:55.075: E/AndroidRuntime(19731): at android.os.Handler.dispatchMessage(Handler.java:99)
03-03 22:15:55.075: E/AndroidRuntime(19731): at android.os.Looper.loop(Looper.java:213)
03-03 22:15:55.075: E/AndroidRuntime(19731): at android.app.ActivityThread.main(ActivityThread.java:5225)
03-03 22:15:55.075: E/AndroidRuntime(19731): at java.lang.reflect.Method.invokeNative(Native Method)
03-03 22:15:55.075: E/AndroidRuntime(19731): at java.lang.reflect.Method.invoke(Method.java:525)
03-03 22:15:55.075: E/AndroidRuntime(19731): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
03-03 22:15:55.075: E/AndroidRuntime(19731): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
03-03 22:15:55.075: E/AndroidRuntime(19731): at dalvik.system.NativeStart.main(Native Method)
03-03 22:15:55.075: E/AndroidRuntime(19731): Caused by: java.lang.ArrayIndexOutOfBoundsException: length=10; index=10
03-03 22:15:55.075: E/AndroidRuntime(19731): at com.hb.examples.PinnedSectionListActivity$SimpleAdapter.<init>(PinnedSectionListActivity.java:124)
03-03 22:15:55.075: E/AndroidRuntime(19731): at com.hb.examples.PinnedSectionListActivity.initializeAdapter(PinnedSectionListActivity.java:338)
03-03 22:15:55.075: E/AndroidRuntime(19731): at com.hb.examples.PinnedSectionListActivity.initializeHeaderAndFooter(PinnedSectionListActivity.java:326)
03-03 22:15:55.075: E/AndroidRuntime(19731): at com.hb.examples.PinnedSectionListActivity.onCreate(PinnedSectionListActivity.java:242)
03-03 22:15:55.075: E/AndroidRuntime(19731): at android.app.Activity.performCreate(Activity.java:5133)
03-03 22:15:55.075: E/AndroidRuntime(19731): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
03-03 22:15:55.075: E/AndroidRuntime(19731): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2230)
答案 0 :(得分：3)
您的问题似乎就在这里：
for (int j = 0;j < CATEGORY.length;j++) {
//Item item = new Item(Item.ITEM, section.text.toUpperCase(Locale.KOREA) + " - " + j);
Item item = new Item(Item.ITEM, CATEGORY[i]);
您使用变量j进行迭代，但您使用i作为索引。
此外，您的巨大switch代码可以像这样减少
if (i<=5)
title = country[i];
此外，LogCat表示它无法创建活动，因此问题可能在您的onCreate()方法上。如果你正在调用你在onCreate上发布的代码，那么我在这里写的内容可以解决你的问题，但也许你正在做一些你没有发布的其他数组操作。