如何使用可扩展列表视图在导航抽屉中添加子元素
how to add child element in navigationdrawer with expandble listview
请帮助我，我是 android 开发的新手 我已经创建了一个导航抽屉，现在我想在其中添加子元素，我该如何添加。
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
mDrawerListView = (ListView) inflater.inflate(
R.layout.fragment_navigation_drawer, container, false);
mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItem(position);
}
});
mDrawerListView.setAdapter(new ArrayAdapter<String>(
getActionBar().getThemedContext(),
android.R.layout.simple_list_item_activated_1,
android.R.id.text1,
new String[]{
getString(R.string.title_section1),
getString(R.string.title_section2),
getString(R.string.title_section3),
getString(R.string.title_section4),
getString(R.string.title_section5),
getString(R.string.title_section6),
getString(R.string.title_section7)
}));
mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);
return mDrawerListView;
}
我想添加这些元素的子元素
您可以通过两种方式实现，第一种在@Sharanbasu Angadi 的评论中进行了解释 - 即使用本教程中详细解释的菜单资源 - http://www.androidhive.info/2013/11/android-sliding-menu-using-navigation-drawer/
如果您想自定义列表视图项目和 headers，第二个选项很重要，请在 NavigationView 中使用 ExpandableListView，如下面的代码所述。
activity_main.xml
<android.support.v4.widget.DrawerLayout 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:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<include layout="@layout/nav_header_main"
android:id="@+id/nav_header_main"
/>
<ExpandableListView
android:id="@+id/nav_explistview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/nav_header_main"/>
</RelativeLayout>
</android.support.design.widget.NavigationView>
MainActivity.java
package com.webege.rivu.navmenuexpandablelistview;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ExpandableListView;
import com.webege.rivu.navmenuexpandablelistview.adapters.ExpandableListAdapter;
import java.util.ArrayList;
import java.util.HashMap;
public class MainActivity extends AppCompatActivity {
private ExpandableListView nav_explistview;
ArrayList<String> listDataHeader = new ArrayList<String>();;
HashMap<String, ArrayList<String>> listDataChild = new HashMap<String, ArrayList<String>>();;
private ExpandableListAdapter listAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
nav_explistview = (ExpandableListView) findViewById(R.id.nav_explistview);
// preparing list data
populateListData();
listAdapter = new ExpandableListAdapter(listDataHeader, listDataChild,this);
// setting list adapter
nav_explistview.setAdapter(listAdapter);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
private void populateListData() {
// Adding child data
listDataHeader.add("Heading 1");
listDataHeader.add("Heading 2");
listDataHeader.add("Heading 3");
// Adding child data
ArrayList<String> heading1 = new ArrayList<String>();
heading1.add("Sub Item 1");
heading1.add("Sub Item 2");
heading1.add("Sub Item 3");
heading1.add("Sub Item 4");
ArrayList<String> heading2 = new ArrayList<String>();
heading2.add("Sub Item 1");
heading2.add("Sub Item 2");
ArrayList<String> heading3 = new ArrayList<String>();
heading3.add("Sub Item 1");
heading3.add("Sub Item 2");
heading3.add("Sub Item 3");
heading3.add("Sub Item 4");
heading3.add("Sub Item 5");
heading3.add("Sub Item 6");
heading3.add("Sub Item 7");
listDataChild.put(listDataHeader.get(0), heading1); // Header, Child data
listDataChild.put(listDataHeader.get(1), heading2);
listDataChild.put(listDataHeader.get(2), heading3);
}
}
所以只要在NavigationView里面加上一个ExpandableListView，然后按照你想要的方式正常初始化ExpandableListView，就可以得到预期的结果。
有关 ExpandableListView 的进一步说明，请查看 AndroidHive 上的这篇文章。
尝试这种方式添加子元素ExpandableListview
public class MainActivity extends AppCompatActivity {
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mDrawerToggle;
private String mActivityTitle;
private String[] items;
private ExpandableListView mExpandableListView;
private ExpandableListAdapter mExpandableListAdapter;
private List<String> mExpandableListTitle;
private NavigationManager mNavigationManager;
private Map<String, List<String>> mExpandableListData;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mActivityTitle = getTitle().toString();
mExpandableListView = (ExpandableListView) findViewById(R.id.navList);
mNavigationManager = FragmentNavigationManager.obtain(this);
initItems();
LayoutInflater inflater = getLayoutInflater();
View listHeaderView = inflater.inflate(R.layout.nav_header, null, false);
mExpandableListView.addHeaderView(listHeaderView);
mExpandableListData = ExpandableListDataSource.getData(this);
mExpandableListTitle = new ArrayList(mExpandableListData.keySet());
addDrawerItems();
setupDrawer();
if (savedInstanceState == null) {
selectFirstItemAsDefault();
}
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
private void selectFirstItemAsDefault() {
if (mNavigationManager != null) {
String firstActionMovie = getResources().getStringArray(R.array.actionFilms)[0];
mNavigationManager.showFragmentAction(firstActionMovie);
getSupportActionBar().setTitle(firstActionMovie);
}
}
private void initItems() {
items = getResources().getStringArray(R.array.film_genre);
}
private void addDrawerItems() {
mExpandableListAdapter = new CustomExpandableListAdapter(this, mExpandableListTitle, mExpandableListData);
mExpandableListView.setAdapter(mExpandableListAdapter);
mExpandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
getSupportActionBar().setTitle(mExpandableListTitle.get(groupPosition).toString());
}
});
mExpandableListView.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() {
@Override
public void onGroupCollapse(int groupPosition) {
getSupportActionBar().setTitle(R.string.film_genres);
}
});
mExpandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
String selectedItem = ((List) (mExpandableListData.get(mExpandableListTitle.get(groupPosition))))
.get(childPosition).toString();
getSupportActionBar().setTitle(selectedItem);
if (items[0].equals(mExpandableListTitle.get(groupPosition))) {
mNavigationManager.showFragmentAction(selectedItem);
} else if (items[1].equals(mExpandableListTitle.get(groupPosition))) {
mNavigationManager.showFragmentComedy(selectedItem);
} else if (items[2].equals(mExpandableListTitle.get(groupPosition))) {
mNavigationManager.showFragmentDrama(selectedItem);
} else if (items[3].equals(mExpandableListTitle.get(groupPosition))) {
mNavigationManager.showFragmentMusical(selectedItem);
} else if (items[4].equals(mExpandableListTitle.get(groupPosition))) {
mNavigationManager.showFragmentThriller(selectedItem);
} else {
throw new IllegalArgumentException("Not supported fragment type");
}
mDrawerLayout.closeDrawer(GravityCompat.START);
return false;
}
});
}
private void setupDrawer() {
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.drawer_open, R.string.drawer_close) {
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getSupportActionBar().setTitle(R.string.film_genres);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
/** Called when a drawer has settled in a completely closed state. */
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
getSupportActionBar().setTitle(mActivityTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
mDrawerToggle.setDrawerIndicatorEnabled(true);
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
@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);
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, 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();
// Activate the navigation drawer toggle
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
请帮助我，我是 android 开发的新手 我已经创建了一个导航抽屉，现在我想在其中添加子元素，我该如何添加。
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
mDrawerListView = (ListView) inflater.inflate(
R.layout.fragment_navigation_drawer, container, false);
mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItem(position);
}
});
mDrawerListView.setAdapter(new ArrayAdapter<String>(
getActionBar().getThemedContext(),
android.R.layout.simple_list_item_activated_1,
android.R.id.text1,
new String[]{
getString(R.string.title_section1),
getString(R.string.title_section2),
getString(R.string.title_section3),
getString(R.string.title_section4),
getString(R.string.title_section5),
getString(R.string.title_section6),
getString(R.string.title_section7)
}));
mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);
return mDrawerListView;
}
我想添加这些元素的子元素
您可以通过两种方式实现，第一种在@Sharanbasu Angadi 的评论中进行了解释 - 即使用本教程中详细解释的菜单资源 - http://www.androidhive.info/2013/11/android-sliding-menu-using-navigation-drawer/
如果您想自定义列表视图项目和 headers，第二个选项很重要，请在 NavigationView 中使用 ExpandableListView，如下面的代码所述。
activity_main.xml
<android.support.v4.widget.DrawerLayout 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:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<include layout="@layout/nav_header_main"
android:id="@+id/nav_header_main"
/>
<ExpandableListView
android:id="@+id/nav_explistview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/nav_header_main"/>
</RelativeLayout>
</android.support.design.widget.NavigationView>
MainActivity.java
package com.webege.rivu.navmenuexpandablelistview;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ExpandableListView;
import com.webege.rivu.navmenuexpandablelistview.adapters.ExpandableListAdapter;
import java.util.ArrayList;
import java.util.HashMap;
public class MainActivity extends AppCompatActivity {
private ExpandableListView nav_explistview;
ArrayList<String> listDataHeader = new ArrayList<String>();;
HashMap<String, ArrayList<String>> listDataChild = new HashMap<String, ArrayList<String>>();;
private ExpandableListAdapter listAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
nav_explistview = (ExpandableListView) findViewById(R.id.nav_explistview);
// preparing list data
populateListData();
listAdapter = new ExpandableListAdapter(listDataHeader, listDataChild,this);
// setting list adapter
nav_explistview.setAdapter(listAdapter);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
private void populateListData() {
// Adding child data
listDataHeader.add("Heading 1");
listDataHeader.add("Heading 2");
listDataHeader.add("Heading 3");
// Adding child data
ArrayList<String> heading1 = new ArrayList<String>();
heading1.add("Sub Item 1");
heading1.add("Sub Item 2");
heading1.add("Sub Item 3");
heading1.add("Sub Item 4");
ArrayList<String> heading2 = new ArrayList<String>();
heading2.add("Sub Item 1");
heading2.add("Sub Item 2");
ArrayList<String> heading3 = new ArrayList<String>();
heading3.add("Sub Item 1");
heading3.add("Sub Item 2");
heading3.add("Sub Item 3");
heading3.add("Sub Item 4");
heading3.add("Sub Item 5");
heading3.add("Sub Item 6");
heading3.add("Sub Item 7");
listDataChild.put(listDataHeader.get(0), heading1); // Header, Child data
listDataChild.put(listDataHeader.get(1), heading2);
listDataChild.put(listDataHeader.get(2), heading3);
}
}
所以只要在NavigationView里面加上一个ExpandableListView，然后按照你想要的方式正常初始化ExpandableListView，就可以得到预期的结果。
有关 ExpandableListView 的进一步说明，请查看 AndroidHive 上的这篇文章。
尝试这种方式添加子元素ExpandableListview
public class MainActivity extends AppCompatActivity {
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mDrawerToggle;
private String mActivityTitle;
private String[] items;
private ExpandableListView mExpandableListView;
private ExpandableListAdapter mExpandableListAdapter;
private List<String> mExpandableListTitle;
private NavigationManager mNavigationManager;
private Map<String, List<String>> mExpandableListData;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mActivityTitle = getTitle().toString();
mExpandableListView = (ExpandableListView) findViewById(R.id.navList);
mNavigationManager = FragmentNavigationManager.obtain(this);
initItems();
LayoutInflater inflater = getLayoutInflater();
View listHeaderView = inflater.inflate(R.layout.nav_header, null, false);
mExpandableListView.addHeaderView(listHeaderView);
mExpandableListData = ExpandableListDataSource.getData(this);
mExpandableListTitle = new ArrayList(mExpandableListData.keySet());
addDrawerItems();
setupDrawer();
if (savedInstanceState == null) {
selectFirstItemAsDefault();
}
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
private void selectFirstItemAsDefault() {
if (mNavigationManager != null) {
String firstActionMovie = getResources().getStringArray(R.array.actionFilms)[0];
mNavigationManager.showFragmentAction(firstActionMovie);
getSupportActionBar().setTitle(firstActionMovie);
}
}
private void initItems() {
items = getResources().getStringArray(R.array.film_genre);
}
private void addDrawerItems() {
mExpandableListAdapter = new CustomExpandableListAdapter(this, mExpandableListTitle, mExpandableListData);
mExpandableListView.setAdapter(mExpandableListAdapter);
mExpandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
getSupportActionBar().setTitle(mExpandableListTitle.get(groupPosition).toString());
}
});
mExpandableListView.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() {
@Override
public void onGroupCollapse(int groupPosition) {
getSupportActionBar().setTitle(R.string.film_genres);
}
});
mExpandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
String selectedItem = ((List) (mExpandableListData.get(mExpandableListTitle.get(groupPosition))))
.get(childPosition).toString();
getSupportActionBar().setTitle(selectedItem);
if (items[0].equals(mExpandableListTitle.get(groupPosition))) {
mNavigationManager.showFragmentAction(selectedItem);
} else if (items[1].equals(mExpandableListTitle.get(groupPosition))) {
mNavigationManager.showFragmentComedy(selectedItem);
} else if (items[2].equals(mExpandableListTitle.get(groupPosition))) {
mNavigationManager.showFragmentDrama(selectedItem);
} else if (items[3].equals(mExpandableListTitle.get(groupPosition))) {
mNavigationManager.showFragmentMusical(selectedItem);
} else if (items[4].equals(mExpandableListTitle.get(groupPosition))) {
mNavigationManager.showFragmentThriller(selectedItem);
} else {
throw new IllegalArgumentException("Not supported fragment type");
}
mDrawerLayout.closeDrawer(GravityCompat.START);
return false;
}
});
}
private void setupDrawer() {
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.drawer_open, R.string.drawer_close) {
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getSupportActionBar().setTitle(R.string.film_genres);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
/** Called when a drawer has settled in a completely closed state. */
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
getSupportActionBar().setTitle(mActivityTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
mDrawerToggle.setDrawerIndicatorEnabled(true);
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
@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);
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, 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();
// Activate the navigation drawer toggle
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
}