Question

我的操作栏中有一个edittext。但当我切换到另一个片段时，edittext仍然存在。我想只在一个片段中使用edittext。此外，它似乎隐藏了actiobar标题：/ 请帮我。（感谢）

这是我的代码：

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) 
{ 
    menu.clear();
    inflater.inflate(R.menu.menu_tab1, menu); 
    ActionBar actionBar = getActivity().getActionBar();
    // add the custom view to the action bar
    actionBar.setCustomView(R.layout.search);
    search = (EditText) actionBar.getCustomView().findViewById(R.id.search_user);

    search.setOnEditorActionListener(new OnEditorActionListener() 
    {

      @Override
      public boolean onEditorAction(TextView v, int actionId,
          KeyEvent event) 
      {
          try
          {
                  //TASKS
              }
          catch(Exception e)
          {
            Toast.makeText(Tab1.this.getActivity(), "Problem. Please restart the app", Toast.LENGTH_LONG).show();
          }
          return false;
      }
    });
    actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM
            | ActionBar.DISPLAY_SHOW_HOME);

    super.onCreateOptionsMenu(menu, inflater);
}

Answer 1

我发布了一个活动的简单示例，其中包含3个标签，每个标签由一个片段表示。每个片段将自己的项目添加到操作栏。第一个片段添加图标，第二个片段添加edittext视图，第三个片段添加任何内容。当特定片段可见时，只有片段操作项在操作栏上可见。

MainActivity.java

package com.example.user.actionbartabs;

import java.util.Locale;

import android.app.Activity;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.FragmentPagerAdapter;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;


public class MainActivity extends ActionBarActivity implements ActionBar.TabListener {

    /**
     * The {@link android.support.v4.view.PagerAdapter} that will provide
     * fragments for each of the sections. We use a
     * {@link FragmentPagerAdapter} derivative, which will keep every
     * loaded fragment in memory. If this becomes too memory intensive, it
     * may be best to switch to a
     * {@link android.support.v4.app.FragmentStatePagerAdapter}.
     */
    SectionsPagerAdapter mSectionsPagerAdapter;

    /**
     * The {@link ViewPager} that will host the section contents.
     */
    ViewPager mViewPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Set up the action bar.
        final ActionBar actionBar = getSupportActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

        // Create the adapter that will return a fragment for each of the three
        // primary sections of the activity.
        mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());

        // Set up the ViewPager with the sections adapter.
        mViewPager = (ViewPager) findViewById(R.id.pager);
        mViewPager.setAdapter(mSectionsPagerAdapter);

        // When swiping between different sections, select the corresponding
        // tab. We can also use ActionBar.Tab#select() to do this if we have
        // a reference to the Tab.
        mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
            @Override
            public void onPageSelected(int position) {
                actionBar.setSelectedNavigationItem(position);
            }
        });

        // For each of the sections in the app, add a tab to the action bar.
        for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
            // Create a tab with text corresponding to the page title defined by
            // the adapter. Also specify this Activity object, which implements
            // the TabListener interface, as the callback (listener) for when
            // this tab is selected.
            actionBar.addTab(
                    actionBar.newTab()
                            .setText(mSectionsPagerAdapter.getPageTitle(i))
                            .setTabListener(this));
        }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
        // When the given tab is selected, switch to the corresponding page in
        // the ViewPager.
        mViewPager.setCurrentItem(tab.getPosition());
    }

    @Override
    public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
    }

    @Override
    public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
    }

    /**
     * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
     * one of the sections/tabs/pages.
     */
    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).
            return PlaceholderFragment.newInstance(position + 1);
        }

        @Override
        public int getCount() {
            // Show 3 total pages.
            return 3;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            Locale l = Locale.getDefault();
            switch (position) {
                case 0:
                    return getString(R.string.title_section1).toUpperCase(l);
                case 1:
                    return getString(R.string.title_section2).toUpperCase(l);
                case 2:
                    return "Section 3".toUpperCase(l);
            }
            return null;
        }
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {
        /**
         * The fragment argument representing the section number for this
         * fragment.
         */
        private static final String ARG_SECTION_NUMBER = "section_number";

        private int sectionNumber;

        /**
         * Returns a new instance of this fragment for the given section
         * number.
         */
        public static PlaceholderFragment newInstance(int sectionNumber) {
            PlaceholderFragment fragment = new PlaceholderFragment();
            Bundle args = new Bundle();
            args.putInt(ARG_SECTION_NUMBER, sectionNumber);
            fragment.setArguments(args);
            return fragment;
        }

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            sectionNumber = getArguments().getInt(ARG_SECTION_NUMBER);
            View rootView = inflater.inflate(R.layout.fragment_main, container, false);
            return rootView;
        }

        @Override
        public void onAttach (Activity activity) {
            super.onAttach(activity);
            setHasOptionsMenu(true);
        }

        @Override
        public void onActivityCreated(Bundle bundle) {
            super.onActivityCreated(bundle);
            ((TextView) getView().findViewById(R.id.section_label)).setText(Integer.toString(sectionNumber));
        }

        @Override
        public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
            // Inflate the menu; this adds items to the action bar if it is present.
            switch(sectionNumber) {
                case 1:
                    inflater.inflate(R.menu.menu_section1, menu);
                    break;
                case 2:
                    inflater.inflate(R.menu.menu_section2, menu);
                    EditText editText = (EditText) MenuItemCompat.getActionView(menu.findItem(R.id.action_settings));
                    editText.setOnEditorActionListener(new TextView.OnEditorActionListener()
                    {
                        @Override
                        public boolean onEditorAction(TextView v, int actionId, KeyEvent event)
                        {
                            //Do something here
                            return false;
                        }
                    });
                    break;
                case 3:
                    inflater.inflate(R.menu.menu_section3, menu);
                    break;
                default:
                    break;
            }
            //Set action bar title
            ((ActionBarActivity) getActivity()).getSupportActionBar().setTitle("Section " + sectionNumber);
        }
    }

}

activity_main.xml中

<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:id="@+id/pager"
    android:layout_width="match_parent" android:layout_height="match_parent"
    tools:context=".MainActivity" />

fragment_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context=".MainActivity$PlaceholderFragment">

    <TextView android:id="@+id/section_label" android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</RelativeLayout>

action_item_edit_text.xml

<EditText xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/editInput"
    android:layout_width="140dp"
    android:layout_height="?attr/actionBarSize"
    android:hint="Write something"
    android:singleLine="true"
    android:background="@android:color/white"
    android:textColorHint="#BBBBBB"
    android:textColor="@android:color/black"
    android:textSize="14sp"
    android:padding="6dp"/>

menu_section1.xml

<menu 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" tools:context=".MainActivity">
    <item android:id="@+id/action_settings" android:icon="@drawable/abc_ic_ab_back_mtrl_am_alpha"
         app:showAsAction="always" />
</menu>

menu_section2.xml

<menu 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" tools:context=".MainActivity">
    <item android:id="@+id/action_settings"  app:actionLayout="@layout/action_item_edit_text"
         app:showAsAction="always" />
</menu>

menu_section3.xml

<menu 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" tools:context=".MainActivity">

</menu>

请注意，由于不建议使用带有操作栏的标签的API级别21，因此您可能希望禁用它们并且仅坚持查看寻呼机。我发布了带有标签的示例，因为您在问题中提到过它们。

（android）动作栏片段中的Edittext

1 个答案: