我的主要问题是我收到一条错误消息：ImagePagerAdapter cannot be resolved to a type 在第 80 行：
第 80 行是ImagePagerAdapter adapter = new ImagePagerAdapter();
而且我还收到一条警告： The type Home.ThumbnailLoadedListener.ImagePagerAdapter is never used locally
我很确定由于右括号放错位置而无法访问我的 ImagePagerAdapter - 我已经尝试调整其中一些，但我只是在确定哪个导致问题时遇到了一些麻烦（或者如果可能可能是别的东西）
我还遇到了一些其他错误，这些错误与一大块代码（基本上是第二半）未定义/未达到，但我 99% 确定这都与语法问题或错误放置的括号有关。
所有错误：
ImagePagerAdapter cannot be resolved to a type line 80
ImagePagerAdapter cannot be resolved to a type line 80
ThumbnailListener cannot be resolved to a type line 225
The method onCreateOptionsMenu(Menu) is undefined for the type Object line 246
The method onConfigurationChanged(Configuration) is undefined for the type Object line 238
The method onOptionsItemSelected(MenuItem) is undefined for the type Object line 257
附言
对于大量代码，我深表歉意——我只是不确定如果我只展示其中的一部分是否可以解决。
资源：
public class Home extends YouTubeBaseActivity implements
YouTubePlayer.OnInitializedListener,
YouTubeThumbnailView.OnInitializedListener {
public static final String API_KEY = "XXXXXXXXXXXXXXXXXXXXXXXXXX";
public static final String VIDEO_ID = "o7VVHhK9zf0";
public static final String VIDEO1_ID = "xVHHJqntuXI";
public static final String VIDEO2_ID = "YWteQj_q3Ro";
public static final String VIDEO3_ID = "83ZgtqTw-mI";
public static final String VIDEO4_ID = "n5wMza29JwI";
private YouTubePlayer youTubePlayer;
private YouTubePlayerView youTubePlayerView;
private YouTubeThumbnailView youTubeThumbnailView1;
private YouTubeThumbnailView youTubeThumbnailView2;
private YouTubeThumbnailView youTubeThumbnailView3;
private YouTubeThumbnailView youTubeThumbnailView4;
private String[] drawerListViewItems;
private DrawerLayout drawerLayout;
private DrawerLayout mDrawerLayout;
private ListView drawerListView;
private ListView mDrawerList;
private ActionBarDrawerToggle actionBarDrawerToggle;
private ActionBarDrawerToggle mDrawerToggle;
private YouTubeThumbnailLoader thumbnailLoader;
private YouTubeThumbnailLoader youTubeThumbnailLoader;
private YouTubeThumbnailLoader youTubeThumbnailLoader1;
private YouTubeThumbnailLoader youTubeThumbnailLoader2;
private YouTubeThumbnailLoader youTubeThumbnailLoader3;
private boolean nextThumbnailLoaded;
ScrollView mainScrollView;
Button fav_up_btn1;
Button fav_dwn_btn1;
ArrayAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
ImagePagerAdapter adapter = new ImagePagerAdapter();
viewPager.setAdapter(adapter);
final ActionBar actionBar = getActionBar();
actionBar.setCustomView(R.layout.actionbar_custom_view_home);
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setDisplayShowCustomEnabled(true);
// get list items from strings.xml
drawerListViewItems = getResources().getStringArray(R.array.items);
// 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));
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
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 */
);
drawerLayout.setDrawerListener(actionBarDrawerToggle);
getActionBar().setDisplayHomeAsUpEnabled(true);
drawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
GravityCompat.START);
youTubePlayerView = (YouTubePlayerView) findViewById(R.id.youtubeplayerview);
youTubePlayerView.initialize(API_KEY, this);
mainScrollView = (ScrollView) findViewById(R.id.groupScrollView);
youTubeThumbnailView1 = (YouTubeThumbnailView) findViewById(R.id.youtubethumbnailview1);
youTubeThumbnailView1.initialize(API_KEY, this);
fav_up_btn1 = (Button) findViewById(R.id.fav_up_btn1);
fav_up_btn1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
boolean favIsUp = fav_up_btn1
.getBackground()
.getConstantState()
.equals(getResources().getDrawable(
R.drawable.fav_up_btn1).getConstantState());
// set the background
fav_up_btn1
.setBackgroundResource(favIsUp ? R.drawable.fav_dwn_btn1
: R.drawable.fav_up_btn1);
}
});
youTubeThumbnailView1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
if (youTubePlayer != null) {
youTubePlayer.cueVideo(VIDEO1_ID);
youTubePlayer.play();
mainScrollView.smoothScrollTo(0, 0);
}
}
});
youTubeThumbnailView2 = (YouTubeThumbnailView) findViewById(R.id.youtubethumbnailview2);
youTubeThumbnailView2.initialize(API_KEY, this);
youTubeThumbnailView2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg1) {
if (youTubePlayer != null) {
youTubePlayer.cueVideo(VIDEO2_ID);
youTubePlayer.play();
mainScrollView.smoothScrollTo(0, 0);
}
}
});
youTubeThumbnailView3 = (YouTubeThumbnailView) findViewById(R.id.youtubethumbnailview3);
youTubeThumbnailView3.initialize(API_KEY, this);
youTubeThumbnailView3.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg1) {
if (youTubePlayer != null) {
youTubePlayer.cueVideo(VIDEO3_ID);
youTubePlayer.play();
mainScrollView.smoothScrollTo(0, 0);
}
}
});
youTubeThumbnailView4 = (YouTubeThumbnailView) findViewById(R.id.youtubethumbnailview4);
youTubeThumbnailView4.initialize(API_KEY, this);
youTubeThumbnailView4.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg1) {
if (youTubePlayer != null) {
youTubePlayer.cueVideo(VIDEO4_ID);
youTubePlayer.play();
mainScrollView.smoothScrollTo(0, 0);
}
}
});
}
@Override
public void onInitializationFailure(Provider provider,
YouTubeInitializationResult result) {
}
@Override
public void onInitializationSuccess(Provider provider,
YouTubePlayer player, boolean wasRestored) {
youTubePlayer = player;
if (!wasRestored) {
player.cueVideo(VIDEO_ID);
}
}
@Override
public void onInitializationFailure(YouTubeThumbnailView thumbnailView,
YouTubeInitializationResult error) {
}
@Override
public void onInitializationSuccess(YouTubeThumbnailView thumbnailView,
YouTubeThumbnailLoader thumbnailLoader) {
this.thumbnailLoader = thumbnailLoader;
thumbnailLoader.setOnThumbnailLoadedListener(new ThumbnailListener());
}
private final class ThumbnailLoadedListener implements
YouTubeThumbnailLoader.OnThumbnailLoadedListener {
@Override
public void onThumbnailLoaded(YouTubeThumbnailView arg0, String arg1) {
youTubeThumbnailLoader1.setVideo(VIDEO1_ID);
}
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
actionBarDrawerToggle.onConfigurationChanged(newConfig);
}
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu items for use in the action bar
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// call ActionBarDrawerToggle.onOptionsItemSelected(), if it returns
// true
// then it has handled the app icon touch event
if (actionBarDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
private class ImagePagerAdapter extends PagerAdapter {
private int[] mImages = new int[] { R.drawable.classical_up_btn,
R.drawable.country_up_btn, R.drawable.dance_up_btn,
R.drawable.hiphop_up_btn };
public int getCount() {
return mImages.length;
}
public boolean isViewFromObject(View view, Object object) {
return view == ((ImageView) object);
}
public Object instantiateItem(ViewGroup container, int position) {
Context context = Home.this;
ImageView imageView = new ImageView(context);
int padding = context.getResources().getDimensionPixelSize(
R.dimen.padding_medium);
imageView.setPadding(padding, padding, padding, padding);
imageView.setScaleType(ImageView.ScaleType.CENTER);
imageView.setImageResource(mImages[position]);
((ViewPager) container).addView(imageView, 0);
return imageView;
}
@Override
public void destroyItem(ViewGroup container, int position,
Object object) {
((ViewPager) container).removeView((ImageView) object);
}
private final class ThumbnailListener implements
YouTubeThumbnailLoader.OnThumbnailLoadedListener {
@Override
public void onThumbnailLoaded(YouTubeThumbnailView thumbnail,
String videoId) {
// nextThumbnailLoaded = true;
//
// if (activityResumed) {
// if (state.equals(State.LOADING_THUMBNAILS)) {
// flipNext();
// } else if (state.equals(State.VIDEO_FLIPPED_OUT)) {
// // load player with the video of the next thumbnail being
// flipped in
// state = State.VIDEO_LOADING;
// player.cueVideo(videoId);
}
@Override
public void onThumbnailError(YouTubeThumbnailView arg0,
ErrorReason arg1) {
// TODO Auto-generated method stub
}
}
}
public void onThumbnailError(YouTubeThumbnailView thumbnail,
YouTubeThumbnailLoader.ErrorReason reason) {
loadNextThumbnail();
}
private void loadNextThumbnail() {
nextThumbnailLoaded = false;
if (thumbnailLoader.hasNext()) {
thumbnailLoader.next();
} else {
thumbnailLoader.first();
}
}
}
}