在我的导航抽屉中，我遇到了一个问题，当它在第一位置加载任何内容时，应用程序就会崩溃。因此，我的解决方法是将其设置为一个字符串，该字符串根据高级升级是否已购买而更改为“（应用程序名称）免费”或“（应用程序名称）高级”。希望这个字符串不可点击，因为它目前可以被点击但没有反应。理想状态下，这应该是一个子菜单或标题，但我无法找到实现方法。以下是我的代码摘录：
public class myClass extends SherlockActivity implements
OnItemSelectedListener {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
private String[] mPlanetTitles;
@SuppressLint("NewApi")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mylayout);
mTitle = mDrawerTitle = getTitle();
if (mIsPremium == true) {
mPlanetTitles = getResources().getStringArray(
R.array.planets_array_prem);
} else {
mPlanetTitles = getResources()
.getStringArray(R.array.planets_array);
}
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
// set a custom shadow that overlays the main content when the drawer
// opens
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
GravityCompat.START);
// set up the drawer's list view with items and click listener
mDrawerList.setAdapter(new ArrayAdapter<String>(this,
R.layout.drawer_list_item, mPlanetTitles));
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
// enable ActionBar app icon to behave as action to toggle nav drawer
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
// ActionBarDrawerToggle ties together the the proper interactions
// between the sliding drawer and the action bar app icon
mDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */
mDrawerLayout, /* DrawerLayout object */
R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */
R.string.drawer_open, /* "open drawer" description for accessibility */
R.string.drawer_close /* "close drawer" description for accessibility */
) {
public void onDrawerClosed(View view) {
getSupportActionBar().setTitle(mTitle);
supportInvalidateOptionsMenu(); // creates call to
// onPrepareOptionsMenu()
}
public void onDrawerOpened(View drawerView) {
getSupportActionBar().setTitle(mDrawerTitle);
supportInvalidateOptionsMenu(); // creates call to
// onPrepareOptionsMenu()
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
selectItem(0);
}
}
/* The click listener for ListView in the navigation drawer */
private class DrawerItemClickListener implements
ListView.OnItemClickListener {
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
switch (position) {
case 0:
/*
* Toast.makeText( getApplicationContext(),
* "case 0 - A Activity.", Toast.LENGTH_LONG).show(); Intent
* c0 = new Intent(getBaseContext(),
* activity.class); startActivity(c0);
*/break;
case 1:
Toast.makeText(getApplicationContext(),
"case 1 - B Activity", Toast.LENGTH_LONG).show();
Intent c1 = new Intent(getBaseContext(),
ActivityB.class);
startActivity(c1);
break;
default:
}
}
}
public void selectItem(int position) {
switch (position) {
case 0:
// setContentView(R.layout.main);
break;
case 1:
setContentView(R.layout.main);
break;
default:
}
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getSupportActionBar().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);
}
我不使用片段，我将通过点击并移动到新活动来实现导航抽屉。我正在寻找解决我的主要问题的解决方案，但欢迎任何设计提示。
谢谢
编辑
在CommonsWare的帮助下，我开发了这个：但是在我的应用中没有任何区别。我希望第一次（case 0（位置0））被禁用。
public class MyArrayAdapter extends ArrayAdapter<String> {
public MyArrayAdapter(Context context, int position) {
super(context, 0);
}
public boolean areAllItemsEnabled() {
return false;
}
public boolean isEnabled(int position) {
if (position == 0) {
return false;
} else {
return true;
}
}
}
ArrayAdapter<String>？我猜你没有，因为你的MyArrayAdapter会给你一个空列表，因为你没有往里面放任何数据。 - CommonsWarenew ArrayAdapter<String>(this, R.layout.drawer_list_item, mPlanetTitles)。你需要让MyArrayAdapter有一个构造函数，将你的R.layout.drawer_list_item和mPlanetTitles值传递给超类。 - CommonsWare