我收到了几个Eclipse“警告”，我认为它们可能会导致我在另一篇文章中遇到的问题：
https://stackoverflow.com/questions/20550417/cannot-reach-breakpoint
我有两个问题：
回答我的其他帖子的人似乎认为这与我的位置值有关 - 我无法到达断点的原因是否与这些警告之一相关？ viewpager不起作用 - 我无法设置断点 - 而且我收到了几个关于它的警告。
如何解决这些问题？ （确保我到达断点 - 不仅仅是删除非功能代码：我需要它才能工作）
基本上我需要弄清楚当前源代码中导致我的非功能性viewpager的内容以及无法在下面的当前源代码中设置断点：
The method onTabChanged(PagerAdapter, int, int) from the type Home.ImagePagerAdapter is never used locally:
is occurring on the line: protected void onTabChanged(final PagerAdapter adapter,
The value of the field Home.ImagePagerAdapter.stringArray is not used:
is occurring on the line: private String[] stringArray = new String[] { "vevo",
The constructor Home.ImagePagerAdapter(Activity, int[], String[]) is never used locally:
is occurring on the line: public ImagePagerAdapter(Activity act, int[] mImages,
Multiple markers at this line
- The value of the local variable mPageChangeListener is
not used
- The value of the local variable mPageChangeListener is
not used:
is occurring on the line: final ViewPager.SimpleOnPageChangeListener mPageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
public class Home extends YouTubeBaseActivity implements
VideoClickListener {
// A reference to our list that will hold the video details
private VideosListView listView;
private ActionBarDrawerToggle actionBarDrawerToggle;
public static final String API_KEY = "XXXXXXXXXXXXXXXXXXXXXXXXXXX";
public static final String VIDEO_ID = "o7VVHhK9zf0";
private int mCurrentTabPosition = NO_CURRENT_POSITION;
private static final int NO_CURRENT_POSITION = -1;
private DrawerLayout drawerLayout;
private ListView drawerListView;
private String[] drawerListViewItems;
private ViewPager mPager;
ScrollView mainScrollView;
Button fav_up_btn1;
Button fav_dwn_btn1;
String TAG = "DEBUG THIS";
String playlist = "burtonbcell3";
Activity activity;
int imageArray[];
String[] stringArray;
private OnPageChangeListener mPageChangeListener;
ImagePagerAdapter adapter = new ImagePagerAdapter();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
final ActionBar actionBar = getActionBar();
final ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
viewPager.setAdapter(adapter);
actionBar.setCustomView(R.layout.actionbar_custom_view_home);
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setDisplayShowCustomEnabled(true);
drawerListViewItems = getResources().getStringArray(R.array.items);
drawerListView = (ListView) findViewById(R.id.left_drawer);
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);
listView = (VideosListView) findViewById(R.id.videosListView);
listView.setOnVideoClickListener(this);
new GetYouTubeUserVideosTask(responseHandler, playlist).execute();
setOnPageChangeListener(mPageChangeListener);
final ViewPager.SimpleOnPageChangeListener mPageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
onTabChanged(mPager.getAdapter(), mCurrentTabPosition, position);
position = mCurrentTabPosition;
int oldPos = viewPager.getCurrentItem();
if (position > oldPos) {
System.out.print(position);
// Moving to the right
String playlist = "TheMozARTGROUP";
new GetYouTubeUserVideosTask(responseHandler, playlist)
.execute();
View vg = findViewById(R.layout.home);
vg.invalidate();
} else if (position < oldPos) {
// Moving to the Left
System.out.print(position);
String playlist = "TheMozARTGROUP";
new GetYouTubeUserVideosTask(responseHandler, playlist)
.execute();
View vg = findViewById(R.layout.home);
vg.invalidate();
}
}
private void onTabChanged(PagerAdapter adapter,
int mCurrentTabPosition, int position) {
// TODO Auto-generated method stub
}
};
}
private void setOnPageChangeListener(
OnPageChangeListener mPageChangeListener2) {
// TODO Auto-generated method stub
}
Handler responseHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
populateListWithVideos(msg);
};
};
private void populateListWithVideos(Message msg) {
Library lib = (Library) msg.getData().get(
GetYouTubeUserVideosTask.LIBRARY);
listView.setVideos(lib.getVideos());
}
@Override
protected void onStop() {
responseHandler = null;
super.onStop();
}
@Override
public void onVideoClicked(Video video) {
Intent intent = new Intent(this, Player.class);
intent.putExtra("id", video.getId());
intent.putExtra("title", video.getTitle());
intent.putExtra("uploader", video.getUploader());
intent.putExtra("viewCount", video.getviewCount());
startActivity(intent);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
actionBarDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (actionBarDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
private class ImagePagerAdapter extends PagerAdapter {
public ImagePagerAdapter(Activity act, int[] mImages,
String[] stringArra) {
imageArray = mImages;
activity = act;
stringArray = stringArra;
}
// this is your constructor
public ImagePagerAdapter() {
super();
}
private int[] mImages = new int[] { R.drawable.selstation_up_btn,
R.drawable.classical_up_btn, R.drawable.country_up_btn,
R.drawable.dance_up_btn, R.drawable.hiphop_up_btn,
R.drawable.island_up_btn, R.drawable.latin_up_btn,
R.drawable.pop_up_btn, R.drawable.samba_up_btn };
private String[] stringArray = new String[] { "vevo",
"TheMozARTGROUP", "TimMcGrawVEVO", "TiestoVEVO",
"EminemVEVO" };
@Override
public int getCount() {
return mImages.length;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == ((ImageView) object);
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
Context context = Home.this;
ImageView imageView = new ImageView(context);
imageView.setScaleType(ScaleType.FIT_XY);
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);
}
protected void onTabChanged(final PagerAdapter adapter,
final int oldPosition, final int newPosition) {
// Calc if swipe was left to right, or right to left
if (oldPosition > newPosition) {
// left to right
} else {
// right to left
}
final ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
}
}
}
答案 0 :(得分：0)
如果您从未在本地使用过XXX ，则表示您可以安全地删除方法XXX。 第一个警告意味着您的班级中有一些未使用的代码。这可能会降低整个代码的可读性。
如果您未使用YYY ，则可以安全地从代码中删除变量YYY。声明变量并且不使用它们会增加应用程序的内存消耗。由于它是一个Android应用程序，您应该特别关注程序的内存使用情况。
答案 1 :(得分：0)
我没有直接解决您的问题。但是，我建议您注释掉所有未使用的代码以消除您的警告。如果您的代码仍然无法正常工作，您至少排除了注释掉的代码导致问题。顺便说一下，这些都不是错误，而是警告。与错误不同，警告可以被忽略（虽然我不会）。每当我看到警告时，我怀疑作者没有仔细考虑过那个地方的设计，可能需要重新考虑。