小编Gil*_*ach的帖子

public class MyWorkout extends AppCompatActivity {
    Button addExercise
    // Record how many clicks
    int clickCounter=0;
    private ListView mListView;
    ArrayList<String> listItems = new ArrayList<String>()
    ArrayAdapter<String> adapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        SetContentView(R.layout.activity_my_workout);
        Toolbar MyWorkouttoolbar = (Toolbar) findViewById(R.id.MyWorkouttoolbar);
        setSupportActionBar(MyWorkouttoolbar);
        listItems.add("Power Clean");
        listItems.add("Dead Lift");
        listItems.add("Hang Clean");
        listItems.add("Military Press");
        listItems.add("Leg Press");
        listItems.add("Squat");
        listItems.add("Bench MAX");
        listItems.add("Squat MAX");
        listItems.add("Stair Stepper");
        listItems.add("Treadmill");
        listItems.add("Bike");
        listItems.add("Elliptical");
        listItems.add("Bicep Curls");
        listItems.add("Dumb Bell Squats");
        listItems.add("Goblet Squats");
        listItems.add("Bar Bell Curls");
        listItems.add("Bar Bell Bench Press");
        listItems.add("Dumb Bell Bench Press");
        listItems.add("Incline Bar Bell …

我有一个ViewPager带addOnPageChangeListener.ViewPager有3个选项卡视图(tab1,tab2,tab3).当用户单击tab2时,它会加载一些数据(基本上是a RecyclerView).此时,如果用户再次单击tab2,我需要重新加载数据,但在这种情况下addOnPageChangeListener不会触发.

我的代码:

customPagerAdapter = new CustomPagerAdapter(getSupportFragmentManager(), MainActivity.this);
viewPager.setAdapter(customPagerAdapter);

viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
    public void onPageScrollStateChanged(int state) {
    }

    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
    }

    public void onPageSelected(int position) {
        Log.i("TAG", "position: " + position);
        switch (position) {
            case 0:
                addingMarker(LocationData.find(LocationData.class, "Category = ? ", "1"));
                break;
            case 1:
                addingMarker(LocationData.find(LocationData.class, "Category = ? ", "2"));
                break;
            case 2:
                addingMarker(LocationData.find(LocationData.class, "Category = ? ", "3"));
                break;
        }
    }
}); …