我有一个NavigationDrawer，我将其称为Activity，而无需在不同的类中复制和粘贴相同的代码。因此，我必须将所有代码粘贴到各个类中，我将其放在自己的类中，称为NavDrawer。这是代码。
NavDrawer
public class NavDrawer extends Activity{
ListView mDrawerList;
DrawerLayout mDrawer;
CustomActionBarDrawerToggle mDrawerToggle;
String[] menuItems;
Intent intent, intent2, intent3, intent4, intent5, intent6;
public void _initMenu() {
NsMenuAdapter mAdapter = new NsMenuAdapter(this);
// Add Header
mAdapter.addHeader(R.string.ns_menu_main_header);
// Add first block
menuItems = getResources().getStringArray(
R.array.ns_menu_items);
String[] menuItemsIcon = getResources().getStringArray(
R.array.ns_menu_items_icon);
int res = 0;
for (String item : menuItems) {
int id_title = getResources().getIdentifier(item, "string",
this.getPackageName());
int id_icon = getResources().getIdentifier(menuItemsIcon[res],
"drawable", this.getPackageName());
NsMenuItemModel mItem = new NsMenuItemModel(id_title, id_icon);
mAdapter.addItem(mItem);
res++;
}
mDrawerList = (ListView) findViewById(R.id.drawer);
if (mDrawerList != null)
mDrawerList.setAdapter(mAdapter);
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
}
@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) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
/* Called whenever we call invalidateOptionsMenu() */
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
// If the nav drawer is open, hide action items related to the content view
boolean drawerOpen = mDrawer.isDrawerOpen(mDrawerList);
//menu.findItem(R.id.item1).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
/*
* The action bar home/up should open or close the drawer.
* ActionBarDrawerToggle will take care of this.
*/
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
// Handle your other action bar items...
return super.onOptionsItemSelected(item);
}
private class CustomActionBarDrawerToggle extends ActionBarDrawerToggle {
public CustomActionBarDrawerToggle(Activity mActivity,DrawerLayout mDrawerLayout){
super(
mActivity,
mDrawerLayout,
R.drawable.ic_drawer,
R.string.ns_menu_open,
R.string.ns_menu_close);
}
@Override
public void onDrawerClosed(View view) {
getActionBar().setTitle(getString(R.string.ns_menu_close));
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
@Override
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(getString(R.string.ns_menu_open));
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
}
private class DrawerItemClickListener implements ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// Highlight the selected item, update the title, and close the drawer
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
if(position==0) {
//Open an Activity
}
if(position==1) {
//Open an Activity
}
if(position==2) {
//Open an Activity
}
//You should reset item counter
mDrawer.closeDrawer(mDrawerList);
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.examplelayout);
getActionBar().setDisplayHomeAsUpEnabled(true);
mDrawer = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawer.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
_initMenu();
mDrawerToggle = new CustomActionBarDrawerToggle(this, mDrawer);
mDrawer.setDrawerListener(mDrawerToggle);
_initMenu();
mDrawer = (DrawerLayout) findViewById(R.id.drawer_layout);
}
}
NsMenuAdapter
public class NsMenuAdapter extends ArrayAdapter<NsMenuItemModel> {
public NsMenuAdapter(Context context) {
super(context, 0);
}
public void addHeader(int title) {
add(new NsMenuItemModel(title, -1, true));
}
public void addItem(int title, int icon) {
add(new NsMenuItemModel(title, icon, false));
}
public void addItem(NsMenuItemModel itemModel) {
add(itemModel);
}
@Override
public int getViewTypeCount() {
return 2;
}
@Override
public int getItemViewType(int position) {
return getItem(position).isHeader ? 0 : 1;
}
@Override
public boolean isEnabled(int position) {
return !getItem(position).isHeader;
}
public static class ViewHolder {
public final TextView textHolder;
public final ImageView imageHolder;
public final TextView textCounterHolder;
public ViewHolder(TextView text1, ImageView image1,TextView textcounter1) {
this.textHolder = text1;
this.imageHolder = image1;
this.textCounterHolder=textcounter1;
}
}
public View getView(int position, View convertView, ViewGroup parent) {
NsMenuItemModel item = getItem(position);
ViewHolder holder = null;
View view = convertView;
if (view == null) {
int layout = R.layout.ns_menu_row_counter;
if (item.isHeader)
layout = R.layout.ns_menu_row_header;
view = LayoutInflater.from(getContext()).inflate(layout, null);
TextView text1 = (TextView) view.findViewById(R.id.menurow_title);
ImageView image1 = (ImageView) view.findViewById(R.id.menurow_icon);
TextView textcounter1 = (TextView) view.findViewById(R.id.menurow_counter);
view.setTag(new ViewHolder(text1, image1,textcounter1));
}
Object tag = view.getTag();
if (tag instanceof ViewHolder) {
holder = (ViewHolder) tag;
}
if(item != null && holder != null)
{
if (holder.textHolder != null)
holder.textHolder.setText(item.title);
if (holder.textCounterHolder != null){
if (item.counter > 0){
holder.textCounterHolder.setVisibility(View.VISIBLE);
}else{
holder.textCounterHolder.setVisibility(View.GONE);
}
}
if (holder.imageHolder != null) {
if (item.iconRes > 0) {
holder.imageHolder.setVisibility(View.VISIBLE);
holder.imageHolder.setImageResource(item.iconRes);
} else {
holder.imageHolder.setVisibility(View.GONE);
}
}
}
return view;
}
}
NsMenuItemModel
public class NsMenuItemModel {
public int title;
public int iconRes;
public int counter;
public boolean isHeader;
public NsMenuItemModel(int title, int iconRes,boolean header,int counter) {
this.title = title;
this.iconRes = iconRes;
this.isHeader=header;
this.counter=counter;
}
public NsMenuItemModel(int title, int iconRes,boolean header){
this(title,iconRes,header,0);
}
public NsMenuItemModel(int title, int iconRes) {
this(title,iconRes,false);
}
}
在我希望拥有NavigationDrawer的类中，除了扩展NavigationDrawer类之外什么都不做，所以我有这样的代码
public class ExampleClass extends NavDrawer
当我在ActionBar中运行应用程序时，可视化显示的图像和NavigationDrawer但是是EMPTY。为什么？ 另外，在类NavDrawer的onCreate中我将布局设置为一个Activity的布局，但是如果我必须在ALL中看到它，则无法链接到ONE那个特定布局的特定Activity。所以我想我会专门为NavigationDrawer创建一个，只包含一个结构。代码：
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<!-- The navigation drawer -->
<ListView
android:id="@+id/drawer"
android:layout_width="250dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#F3F3F4"
android:choiceMode="singleChoice"
android:divider="@android:color/transparent"
android:dividerHeight="0dp" >
</ListView>
</android.support.v4.widget.DrawerLayout>
它可以工作吗？
示例的布局具有与此
类似的结构<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
<!-- The navigation drawer -->
<ListView
android:id="@+id/drawer"
android:layout_width="280dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#F3F3F4"
android:choiceMode="singleChoice"
android:divider="@android:color/transparent"
android:dividerHeight="0dp" >
</ListView>
</android.support.v4.widget.DrawerLayout>
我希望得到所有这些问题的答案，如果我的问题看起来微不足道，我会道歉，但是我正在拼命寻求解决方案，但我不能。我希望得到答案和帮助。提前谢谢。