大家好，我有一个选项卡布局，有4个选项卡:
private final String[] TITLE = {"NEAR BY", "GLOBAL", "ROOM", "PRIVATE"};
我不希望TabLayout中的“Global”选项卡，因此我将其从Title数组中移除，因此现在它看起来是这样的:
private final String[] TITLE = {"NEAR BY", "ROOM", "PRIVATE"};
但是，每次我再次运行该应用程序时，都会出现以下错误:
Caused by: java.lang.ArrayIndexOutOfBoundsException: length=3; index=3
这是我的activity代码:
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
Log.i(TAG, "Create fragment position: " + position);
switch (position) {
case 0:
return new NearbyFriendsFragment();
case 1:
GlobalFragment globalFragment = new GlobalFragment();
setListener(globalFragment);
return globalFragment;
case 2:
return new RoomFragment();
default:
return new PrivateFragment();
}
}
@Override
public int getCount() {
return 4;
}
@Override
public CharSequence getPageTitle(int position) {
Log.i(TAG, "Get page title: " + position);
return TITLE[position];
}
}
@Override
public void onTabUpdate(int position, int countBadge) {
Log.i(TAG, "On Tab update: " + position + " , Count Badge: " + countBadge);
arrayCountBadge[position] = countBadge;
customTabView(position, countBadge);
}
我是安卓开发的初学者，请提供您的帮助来解决这个问题。 谢谢
getCount函数返回4，而数组的大小仅为3，请尝试:
@Override
public int getCount() {
return 3;
}
这是完整的代码
public class SectionsPagerAdapter extends FragmentPagerAdapter {
int noOfItems;
public SectionsPagerAdapter(FragmentManager FM,int itemCount) {
super(fm);
this.noOfItems=itemCount;
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
Log.i(TAG, "Create fragment position: " + position);
switch (position) {
case 0:
return new NearbyFriendsFragment();
case 1:
return new RoomFragment();
case 2:
GlobalFragment globalFragment = new GlobalFragment();
setListener(globalFragment);
return globalFragment;
default:
return new PrivateFragment();
}
}
@Override
public int getCount() {
return noOfItems;
}
@Override
public CharSequence getPageTitle(int position) {
Log.i(TAG, "Get page title: " + position);
return TITLE[position];
}
}
@Override
public void onTabUpdate(int position, int countBadge) {
Log.i(TAG, "On Tab update: " + position + " , Count Badge: " + countBadge);
arrayCountBadge[position] = countBadge;
customTabView(position, countBadge);
}
这样，大小（或项目数量）将自动更新。 希望这能帮上忙。 请随意要求澄清。。。
