java - 抽屉项目名称显示为 0

Question

抽屉项目名称存在问题，该名称在字符串文件夹中声明为数组。整个程序和代码运行良好。但在显示操作时显示右侧项目单击，但抽屉项目显示的图像和文本为零。

上面的完整代码如下

import java.util.ArrayList;

import com.Igenesis.fliphound.slidingmenuadapter.NavDrawerListAdapter;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;

import com.Igenesis.fliphound.slidingmenu.NavDrawerItem;

@SuppressLint("NewApi")
public class Navigation_Bar extends Activity {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;

// nav drawer title
private CharSequence mDrawerTitle;

// used to store app title
private CharSequence mTitle;

// slide menu items
private String[] navMenuTitles;
private TypedArray navMenuIcons;

private ArrayList<NavDrawerItem> navDrawerItems;
private NavDrawerListAdapter adapter;

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

    mTitle = mDrawerTitle = getTitle();

    // load slide menu items
    navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);

    // nav drawer icons from resources
    navMenuIcons = getResources()
            .obtainTypedArray(R.array.nav_drawer_icons);

    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    mDrawerList = (ListView) findViewById(R.id.list_slidermenu);

    navDrawerItems = new ArrayList<NavDrawerItem>();

    // adding nav drawer items to array
    // Dashboards
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons.getResourceId(0, -1)));
    // Campaigns
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[1], navMenuIcons.getResourceId(1, -1)));
    // Boards
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[2], navMenuIcons.getResourceId(2, -1)));
    // Accounts, Will add a counter here
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[3], navMenuIcons.getResourceId(3, -1), true, "22"));



    // Recycle the typed array
    navMenuIcons.recycle();

    mDrawerList.setOnItemClickListener(new SlideMenuClickListener());

    // setting the nav drawer list adapter
    adapter = new NavDrawerListAdapter(getApplicationContext(),
            navDrawerItems);
    mDrawerList.setAdapter(adapter);

    // enabling action bar app icon and behaving it as toggle button
    getActionBar().setDisplayHomeAsUpEnabled(true);
    getActionBar().setHomeButtonEnabled(true);

    mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
            R.drawable.ic_drawer, //nav menu toggle icon
            R.string.app_name, // nav drawer open - description for accessibility
            R.string.app_name // nav drawer close - description for accessibility
    ) {
        public void onDrawerClosed(View view) {
            getActionBar().setTitle(mTitle);
            // calling onPrepareOptionsMenu() to show action bar icons
            invalidateOptionsMenu();
        }

        public void onDrawerOpened(View drawerView) {
            getActionBar().setTitle(mDrawerTitle);
            // calling onPrepareOptionsMenu() to hide action bar icons
            invalidateOptionsMenu();
        }
    };
    mDrawerLayout.setDrawerListener(mDrawerToggle);

    if (savedInstanceState == null) {
        // on first time display view for first nav item
        displayView(0);
    }
}

/**
 * Slide menu item click listener
 * */
private class SlideMenuClickListener implements
        ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
        // display view for selected nav drawer item
        displayView(position);
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // toggle nav drawer on selecting action bar app icon/title
    if (mDrawerToggle.onOptionsItemSelected(item)) {
        return true;
    }
    // Handle action bar actions click
    switch (item.getItemId()) {
    case R.id.action_settings:
        return true;
    default:
        return super.onOptionsItemSelected(item);
    }
}

/* *
 * Called when invalidateOptionsMenu() is triggered
 */
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
    // if nav drawer is opened, hide the action items
    boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
    menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
    return super.onPrepareOptionsMenu(menu);
}

/**
 * Diplaying fragment view for selected nav drawer list item
 * */
private void displayView(int position) {
    // update the main content by replacing fragments
    Fragment fragment = null;
    switch (position) {
    case 0:
        fragment = new DashBoardFragment();
        break;
    case 1:
        fragment = new CampaignsFragment();
        break;
    case 2:
        fragment = new BoardsFragment();
        break;
    case 3:
        fragment = new AccountsFragment();
        break;

    default:
        break;
    }

    if (fragment != null) {
        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.frame_container, fragment).commit();

        // update selected item and title, then close the drawer
        mDrawerList.setItemChecked(position, true);
        mDrawerList.setSelection(position);
        setTitle(navMenuTitles[position]);
        mDrawerLayout.closeDrawer(mDrawerList);
    } else {
        // error in creating fragment
        Log.e("MainActivity", "Error in creating fragment");
    }
}

@Override
public void setTitle(CharSequence title) {
    mTitle = title;
    getActionBar().setTitle(mTitle);
}

/**
 * When using the ActionBarDrawerToggle, you must call it during
 * onPostCreate() and onConfigurationChanged()...
 */

@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    // Sync the toggle state after onRestoreInstanceState has occurred.
    mDrawerToggle.syncState();
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    // Pass any configuration change to the drawer toggls
    mDrawerToggle.onConfigurationChanged(newConfig);
}

}

字符串.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

<string name="app_name">FlipHound</string>
<string name="title_navigation_bar">Navigation_Bar</string>
<string name="action_settings">Settings</string>
<string name="flip">fliphound</string>
<string name="loginpage">LOGIN</string>
<string name="loginpagesignin">SIGN IN</string>
<string name="loginpageonclick">SIGNING IN...</string>
<string name="checkboxlgin">Keep me logged in</string>

<style name="DefaultButtonText">
    <item name="android:layout_width">fill_parent</item>
    <item name="android:layout_height">wrap_content</item>
    <item name="android:textColor">#F5F6CE</item>
    <item name="android:gravity">center</item>
    <item name="android:layout_margin">25dp</item>
    <item name="android:textStyle">normal</item>
    <item name="android:textSize">35sp</item>
    <item name="android:shadowColor">#FF0000</item>
    <item name="android:shadowDx">1</item>
    <item name="android:shadowDy">1</item>
    <item name="android:shadowRadius">1</item>
</style>

<string name="fliphound">Dont\'t have and account? Head over to
        &lt;a href=http://www.fliphound.com&gt;fliphound&lt;/a&gt; or call us now to get started.</string>

<string name="drawer_open">Slider Menu Opened</string>
<string name="drawer_close">Slider Menu Closed</string>

<!-- Nav Drawer Menu Items -->
<string-array name="nav_drawer_items">
    <item>DashBoard </item>
    <item>Campaigns</item>
    <item>Boards</item>
    <item>Accounts</item>
</string-array>

<!-- Nav Drawer List Item Icons -->
<!-- Keep them in order as the titles are in -->

<array name="nav_drawer_icons">
    <item>@drawable/ic_dashboard</item>
    <item>@drawable/ic_campaigns</item>
    <item>@drawable/ic_boards</item>
    <item>@drawable/ic_accounts</item>
</array>

<!-- Content Description -->

<string name="dashboard">DashBoard</string>
<string name="campaigns">Campaigns</string>
<string name="boards">Boards</string>
<string name="accounts">Accounts</string>

<string name="desc_list_item_icon">Item Icon</string>

Answer 1

我发现了问题，主要问题是在转换时你在xml中使用了v4.widget.Fragment，并且你直接将其转换为app.Fragment检查你的导入。你必须更换

import android.app.Fragment;
import android.app.FragmentManager;

与

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;

就是这样...