【发布时间】：2014-05-10 18:41:51
【问题描述】：
我刚刚从 developer.android.com 复制了 Navigation Drawer 示例。抽屉工作，我可以用它改变活动，但问题是我看不到我的活动片段。我的问题是什么？ 这是我的代码：
Activity.java：
public class Guide extends ActionBarActivity {
private String[] drawerListViewItems;
private DrawerLayout drawerLayout;
private ListView drawerListView;
private ActionBarDrawerToggle actionBarDrawerToggle;
boolean isPlayersOpen = false;
boolean isMatchOpen = false;
boolean isTournamentOpen = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_guide);
// get list items from strings.xml
drawerListViewItems = getResources().getStringArray(R.array.activity_list);
// get ListView defined in activity_main.xml
drawerListView = (ListView) findViewById(R.id.left_drawer);
// Set the adapter for the list view
drawerListView.setAdapter(new ArrayAdapter<String>(this,
R.layout.drawer_listview_item, drawerListViewItems));
// 2. App Icon
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
// 2.1 create ActionBarDrawerToggle
actionBarDrawerToggle = new ActionBarDrawerToggle(
this, /* host Activity */
drawerLayout, /* DrawerLayout object */
R.drawable.ic_drawer, /* nav drawer icon to replace 'Up' caret */
R.string.drawer_open, /* "open drawer" description */
R.string.drawer_close /* "close drawer" description */
);
// 2.2 Set actionBarDrawerToggle as the DrawerListener
drawerLayout.setDrawerListener(actionBarDrawerToggle);
// 2.3 enable and show "up" arrow
getActionBar().setDisplayHomeAsUpEnabled(true);
// just styling option
drawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
drawerListView.setOnItemClickListener(new DrawerItemClickListener());
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
actionBarDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
actionBarDrawerToggle.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.guide, menu);
return true;
}
public void extendPlayer(View view){
ImageView extendPlayer = (ImageView)findViewById(R.id.players1);
ImageView collapsePlayer = (ImageView)findViewById(R.id.players2);
TextView players_text = (TextView)findViewById(R.id.players_guide_text);
if(isPlayersOpen){
extendPlayer.setVisibility(View.VISIBLE);
collapsePlayer.setVisibility(View.GONE);
players_text.setVisibility(View.GONE);
isPlayersOpen = false;
} else {
extendPlayer.setVisibility(View.GONE);
collapsePlayer.setVisibility(View.VISIBLE);
players_text.setVisibility(View.VISIBLE);
isPlayersOpen = true;
}
}
public void extendMatch(View view){
ImageView extendMatch = (ImageView)findViewById(R.id.match1);
ImageView collapseMatch = (ImageView)findViewById(R.id.match2);
TextView match_text = (TextView)findViewById(R.id.match_guide_text);
if(isMatchOpen){
extendMatch.setVisibility(View.VISIBLE);
collapseMatch.setVisibility(View.GONE);
match_text.setVisibility(View.GONE);
isMatchOpen = false;
} else {
extendMatch.setVisibility(View.GONE);
collapseMatch.setVisibility(View.VISIBLE);
match_text.setVisibility(View.VISIBLE);
isMatchOpen = true;
}
}
public void extendTournament(View view){
ImageView extendTournament = (ImageView)findViewById(R.id.tournament1);
ImageView collapseTournament = (ImageView)findViewById(R.id.tournament2);
TextView tournament_text = (TextView)findViewById(R.id.tournament_guide_text);
if(isTournamentOpen){
extendTournament.setVisibility(View.VISIBLE);
collapseTournament.setVisibility(View.GONE);
tournament_text.setVisibility(View.GONE);
isTournamentOpen = false;
} else {
extendTournament.setVisibility(View.GONE);
collapseTournament.setVisibility(View.VISIBLE);
tournament_text.setVisibility(View.VISIBLE);
isTournamentOpen = true;
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Pass the event to ActionBarDrawerToggle, if it returns
// true, then it has handled the app icon touch event
if (actionBarDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
// Handle your other action bar items...
return super.onOptionsItemSelected(item);
}
private class DrawerItemClickListener implements ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView parent, View view, int position, long id) {
drawerLayout.closeDrawer(drawerListView);
if(position == 0){
Intent intent = new Intent(Guide.this, Players.class);
startActivity(intent);
}
if(position == 1){
Toast.makeText(Guide.this, ((TextView)view).getText(), Toast.LENGTH_SHORT).show();
}
if(position == 2){
Intent intent = new Intent(Guide.this, Tournaments.class);
startActivity(intent);
}
if(position == 3){
}
if(position == 4){
Intent intent = new Intent(Guide.this, Info.class);
startActivity(intent);
}
}
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_guide,
container, false);
return rootView;
}
}
}
ExtendPlayer、ExtendMatch 和 ExtendTournament 是我个人的方法。
Activity.xml：
<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 main content view -->
<FrameLayout
android:id="@+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- The navigation drawer -->
<ListView android:id="@+id/left_drawer"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:choiceMode="singleChoice"
android:divider="@android:color/transparent"
android:dividerHeight="0dp"
android:background="#ddd"/>
我的 Fragments 被称为 fragment_guide.xml
谢谢。
【问题讨论】：
标签： android fragment navigation-drawer