相关疑难解决方法(0)

我正在尝试从ViewPager动态添加和删除片段,添加工作没有任何问题,但删除不能按预期工作.

每次我想删除当前项目时,最后一项将被删除.

我还尝试使用FragmentStatePagerAdapter或在适配器的getItemPosition方法中返回POSITION_NONE.

我究竟做错了什么？

这是一个基本的例子:

MainActivity.java

public class MainActivity extends FragmentActivity implements TextProvider {

    private Button mAdd;
    private Button mRemove;
    private ViewPager mPager;

    private MyPagerAdapter mAdapter;

    private ArrayList<String> mEntries = new ArrayList<String>();

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        mEntries.add("pos 1");
        mEntries.add("pos 2");
        mEntries.add("pos 3");
        mEntries.add("pos 4");
        mEntries.add("pos 5");

        mAdd = (Button) findViewById(R.id.add);
        mRemove = (Button) findViewById(R.id.remove);
        mPager = (ViewPager) findViewById(R.id.pager);

        mAdd.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                addNewItem();
            }
        });

        mRemove.setOnClickListener(new OnClickListener() {
            @Override
            public void …

我的活动使用TabLayout+ ViewPager.

此处的选项卡和页面数量是动态的,具体取决于从服务器获取的数据.

崩溃是通过Crashlytics报道的,我无法复制它.

我的活动代码:

@Override
    protected void onCreate(Bundle savedInstanceState) {
        boolean isAppRestarting = PrefUtils.getBoolean("app_restarting", false);
        if (isAppRestarting) {
            super.onCreate(null);
            this.savedInstanceState = null;
        } else {
            super.onCreate(savedInstanceState);
            this.savedInstanceState = savedInstanceState;
        }

        initSlidingTabs();

        fetchSomeData(); // see onDataFetched() below
    }

private void initSlidingTabs() {
        List<FragmentWithTitle> sdsTabs = new ArrayList<>();
            Logger.i("There is saved instance state");
            ArrayList<String> titles = savedInstanceState.getStringArrayList(TAB_TITLES);
            if (titles != null) {
                for (int i = 0; i < titles.size(); i++) {
                    if (getFragment(i) != null) {
                        sdsTabs.add(new …