Android - 在 TabLayout 中显示 ListView

Question

我创建了一个使用 ListView 的应用程序，现在我想在 TabLayout 中显示，我在 Google 上搜索过，但建议的解决方案都不能正常工作。

选项卡布局本身是这样构建的：

页面适配器

public class PageAdapter extends FragmentStatePagerAdapter {
int mNumOfTabs;

public PageAdapter(FragmentManager fm, int NumOfTabs) {
    super(fm);
    this.mNumOfTabs = NumOfTabs;
}

@Override
public Fragment getItem(int position) {

    switch (position) {
        case 0:
            AllTasksTabFragment tab1 = new AllTasksTabFragment();
            return tab1;
        case 1:
            WaitingTasksTabFragment tab2 = new WaitingTasksTabFragment();
            return tab2;
        default:
            return null;
    }
}

@Override
public int getCount() {
    return mNumOfTabs;
}

AllTask​​sTabFragment

public class AllTasksTabFragment extends Fragment
{
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.all_tasks, container, false);
    }
}

主布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="il.ac.shenkar.david.todolistex2.Main2Activity"
    tools:showIn="@layout/activity_main2">

    <android.support.design.widget.TabLayout
        android:id="@+id/tab_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/toolbar"
        android:background="?attr/colorPrimary"
        android:elevation="6dp"
        android:minHeight="?attr/actionBarSize"/>

    <android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="fill_parent"
        android:layout_below="@id/tab_layout"/>

</RelativeLayout>

AllTask​​s 选项卡布局

    <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="8dp"
    android:id="@+id/Main2ActivitylinearLayout3">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:gravity="right"
        android:paddingRight="10dp"
        android:text=""
        android:id="@+id/totalTask"
        android:textAppearance="?android:attr/textAppearanceMedium" />
</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="25dp"
    android:id="@+id/Main2ActivitylinearLayout">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:gravity="center_vertical"
        android:paddingLeft="5dp"
        android:paddingRight="8dp"
        android:text="Sort:"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <Spinner android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:entries="@array/sort_array"
        android:id="@+id/sortSpinner"
        android:gravity="center"
        android:textAlignment="center"/>

</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="50dp"
    android:id="@+id/Main2ActivitylinearLayout2">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="No Tasks to Display"
        android:layout_marginTop="60dp"
        android:layout_marginLeft="60dp"
        android:id="@+id/emptylist"
        android:gravity="center"
        android:layout_centerHorizontal="true"
        android:textStyle="bold" />

    <ListView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/alltab_emptylist"
        android:layout_centerHorizontal="true" />
</LinearLayout>

主 Activity OnCreate

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    dbM = DBManager.getInstance(context);
    total_tasks_text = (TextView) findViewById(R.id.totalTask);
    if(Globals.diffusr)
    {
        dbM.clearDB();
    }

    //check if any tasks exist in Parse DB
    ParseQuery<ParseObject> query = new ParseQuery<ParseObject>("Task");
    query.whereEqualTo("TeamName", Globals.team_name);

    if (Globals.IsManager == false) {
        SharedPreferences sharedpreferences = getSharedPreferences("il.ac.shenkar.david.todolistex2", Context.MODE_PRIVATE);
        query.whereEqualTo("Employee", sharedpreferences.getString("LoginUsr", null));

        //if not manager disable action button
        FloatingActionButton fbtn = (FloatingActionButton) findViewById(R.id.fab);
        CoordinatorLayout.LayoutParams p = (CoordinatorLayout.LayoutParams) fbtn.getLayoutParams();
        p.setBehavior(null); //should disable default animations
        p.setAnchorId(View.NO_ID); //should let you set visibility
        fbtn.setLayoutParams(p);
        fbtn.setVisibility(View.GONE);
    }

    itemListAllTasks = new ArrayList<Task>();
    itemListWaitingTasks = new ArrayList<Task>();
    all_list = (ListView) findViewById(R.id.alltasks_listView);
    waiting_list = (ListView) findViewById(R.id.waitingtasks_listView);

    try {
        tsks = query.find();
        for (ParseObject tmp : tsks) {
            tmp_task = new Task();
            tmp_task.setDescription(tmp.getString("Description"));

            int position = tmp.getInt("Category");
            switch (position) {
                case 0:
                    tmp_task.setTask_catg(Category.GENERAL);
                    break;
                case 1:
                    tmp_task.setTask_catg(Category.CLEANING);
                    break;
                case 2:
                    tmp_task.setTask_catg(Category.ELECTRICITY);
                    break;
                case 3:
                    tmp_task.setTask_catg(Category.COMPUTERS);
                    break;
                case 4:
                    tmp_task.setTask_catg(Category.OTHER);
                    break;
            }

            position = tmp.getInt("Priority");
            switch (position) {
                case 0:
                    tmp_task.setPriority(Priority.LOW);
                    break;
                case 1:
                    tmp_task.setPriority(Priority.NORMAL);
                    break;
                case 2:
                    tmp_task.setPriority(Priority.URGENT);
                    break;
                default:
                    tmp_task.setPriority(Priority.NORMAL);
                    break;
            }

            position = tmp.getInt("Status");
            switch (position) {
                case 0:
                    tmp_task.setTask_sts(Task_Status.WAITING);
                    break;
                case 1:
                    tmp_task.setTask_sts(Task_Status.INPROGESS);
                    break;
                case 2:
                    tmp_task.setTask_sts(Task_Status.DONE);
                    break;
                default:
                    tmp_task.setTask_sts(Task_Status.WAITING);
                    break;
            }

            position = tmp.getInt("Location");
            switch (position) {
                case 0:
                    tmp_task.setTsk_location(position);
                    break;
                case 1:
                    tmp_task.setTsk_location(position);
                    break;
                case 2:
                    tmp_task.setTsk_location(position);
                    break;
                case 3:
                    tmp_task.setTsk_location(position);
                    break;
                case 4:
                    tmp_task.setTsk_location(position);
                    break;
                default:
                    tmp_task.setTsk_location(position);
                    break;
            }

            tmp_task.setDueDate(tmp.getDate("DueDate"));
            tmp_task.setParse_task_id(tmp.getObjectId());
            tmp_task.setEmp_name(tmp.getString("Employee"));
            syncTaskList(tmp_task);
        }
    } catch (ParseException e) {
    }

    itemListAllTasks = dbM.getAllTasks();
    all_list.setAdapter(new TaskItemAdapter(context, itemListAllTasks));

    itemListWaitingTasks = dbM.getSortedTasks(Sorting.fromInteger(Sorting.WAITING.ordinal()));
    waiting_list.setAdapter(new TaskItemAdapter(context, itemListWaitingTasks));

    all_list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
        @Override
        public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long arg3) {

            //get item instance from list
            Task tt = (Task) ((TaskItemAdapter) parent.getAdapter()).getItem(position);

            if (Globals.IsManager == true) {
                Globals.temp = tt.getTsk_location();
                //start the create activity again, now for editing
                Intent i = new Intent(getApplicationContext(), EditTaskActivity.class);
                i.putExtra("task", tt);
                startActivityForResult(i, REQUEST_CODE_UPDATE_TASK);
            }
            if (Globals.IsManager == false) {
                //start the create activity again, now for editing
                Intent i = new Intent(getApplicationContext(), ReportTaskStatus.class);
                i.putExtra("task", tt);
                startActivityForResult(i, REQUEST_CODE_EMP_VIEW_TASK);
            }
            return false;
        }
    });

    waiting_list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
        @Override
        public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long arg3) {

            //get item instance from list
            Task tt = (Task) ((TaskItemAdapter) parent.getAdapter()).getItem(position);

            if (Globals.IsManager == true) {
                Globals.temp=tt.getTsk_location();
                //start the create activity again, now for editing
                Intent i = new Intent(getApplicationContext(), EditTaskActivity.class);
                i.putExtra("task", tt);
                startActivityForResult(i, REQUEST_CODE_UPDATE_TASK);
            }
            if (Globals.IsManager == false) {
                //start the create activity again, now for editing
                Intent i = new Intent(getApplicationContext(), ReportTaskStatus.class);
                i.putExtra("task", tt);
                startActivityForResult(i, REQUEST_CODE_EMP_VIEW_TASK);
            }
            return false;
        }
    });

    all_list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            Toast.makeText(context, "Long press to edit task", Toast.LENGTH_SHORT).show();
        }
    });
    waiting_list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            Toast.makeText(context, "Long press to edit task", Toast.LENGTH_SHORT).show();
        }
    });

    emptylist_txt = (TextView) findViewById(R.id.alltab_emptylist);

    if (itemListAllTasks.size() == 0) {
        emptylist_txt.setVisibility(View.VISIBLE);
        total_tasks_text.setVisibility(View.GONE);
    } else {
        emptylist_txt.setVisibility(View.GONE);
        total_tasks_text.setVisibility(View.VISIBLE);
        total_tasks_text.setText("");
        total_tasks_text.setText("Total " + itemListAllTasks.size());
    }
    sorts = getResources().getStringArray(R.array.sort_array);
    sort_selector = (Spinner) findViewById(R.id.sortSpinner);
    sortSpinnerAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, sorts);
    sortSpinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    sort_selector.setAdapter(sortSpinnerAdapter);

    sort_selector.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(
                AdapterView<?> parent, View view, int position, long id) {
            Globals.last_sort = position;
            SortTaskList(position);
        }

        public void onNothingSelected(AdapterView<?> parent) {
            Toast.makeText(context, "Spinner1:no selection", Toast.LENGTH_SHORT).show();
        }
    });

    TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
    tabLayout.addTab(tabLayout.newTab().setText("All Tasks"));
    tabLayout.addTab(tabLayout.newTab().setText("Waiting"));
    tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);

    final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
    final PageAdapter adapter = new PageAdapter
            (getSupportFragmentManager(), tabLayout.getTabCount());
    viewPager.setAdapter(adapter);
    viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
    tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            viewPager.setCurrentItem(tab.getPosition());
        }

        @Override
        public void onTabUnselected(TabLayout.Tab tab) {

        }

        @Override
        public void onTabReselected(TabLayout.Tab tab) {

        }
    });
}

使用制表符时我应该怎么做？ 我有两个选项卡 - AllTask​​s（此处显示）和 Waiting（以相同方式构建）。 如何为每个人发送 ListView？因此，当用户在选项卡之间切换时，将显示正确的列表。

Answer 1

首先从您的活动代码 tabLayout.setOnTabSelectedListener 中删除此侦听器。然后像这样进行。

界面：

  public interface DavidInterface
    {
   List<Task> getListData(int position);
    }

页面适配器；

  public class PageAdapter extends FragmentStatePagerAdapter {
    int mNumOfTabs;

    public PageAdapter(FragmentManager fm, int NumOfTabs) {
        super(fm);
        this.mNumOfTabs = NumOfTabs;
    }

    @Override
    public Fragment getItem(int position) {


          Fragment fragment = new yourOwnFragment();
          Bundle bundle = new Bundle();
          bundle.putInt("position",position);
          fragment.setArguments(bundle);
          return fragment;
    }

    @Override
    public int getCount() {
        return mNumOfTabs;
    }

MainActivityOnCreate：

class MainActivity extends AppcompatActivity implements DavidInterface

{
Hashmap<Integer,List<Task>> task_list_map = new HashMap<>();

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);
    task_list_map.add(listitem1);
    task_list_map.add(listitem2);


}
//Interface method.  
@Override
public List<Task> getListData(int position)
{
    return task_list_map.get(position);

}

标签片段：

public class AllTasksTabFragment extends Fragment
{   DavidInterface davidinterface;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.all_tasks, container, false);
      davidinterface = (DavidInterface)getActivity();
      Bundle bundle = getArguments();
      int pager_position = bundle.getInt("position",position);
      List<Task> task = davidinterface.getListData(pager_position);
     //populate this data in your listview inside this fragment layout. 

    }
}

Answer 2

我的片段代码 R.layout.second_fragment 它的布局与列表视图

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    v = inflater.inflate(R.layout.second_fragment, container, false);
    listView = (ListView) v.findViewById(R.id.times_listView);

    return v;
}