“类已经定义”错误
我有listview应用程序探索城市每一行指向不同的城市，在每个城市活动包括按钮时点击打开新活动，这是无限画廊包含该城市的照片，我添加无限画廊到第一个城市，工作正常，当我想添加它到了第二个城市，它在课堂上给了我红色标记错误如下：
1-已定义InfiniteGalleryAdapter类型。
2 – 已定义InfiniteGallery类型。
我尝试使用相同的结果更改类名，我删除R.java并使用相同的结果重建eclipse。 此外，我从项目属性中取消选中java构建器并获得相同的红色标记错误。
如有任何帮助和建议，将不胜感激
谢谢
我的代码：
public class SecondCity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Boolean customTitleSupported = requestWindowFeature(Window.FEATURE_CUSTOM_TITLE); // Set the layout to use setContentView(R.layout.main); if (customTitleSupported) { getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.custom_title); TextView tv = (TextView) findViewById(R.id.tv); Typeface face=Typeface.createFromAsset(getAssets(),"BFantezy.ttf"); tv.setTypeface(face); tv.setText("MY PICTURES"); } InfiniteGallery galleryOne = (InfiniteGallery) findViewById(R.id.galleryOne); galleryOne.setAdapter(new InfiniteGalleryAdapter(this)); } } class InfiniteGalleryAdapter extends BaseAdapter { **//red mark here (InfiniteGalleryAdapter)** private Context mContext; public InfiniteGalleryAdapter(Context c, int[] imageIds) { this.mContext = c; } public int getCount() { return Integer.MAX_VALUE; } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } private LayoutInflater inflater=null; public InfiniteGalleryAdapter(Context a) { this.mContext = a; inflater = (LayoutInflater)mContext.getSystemService ( Context.LAYOUT_INFLATER_SERVICE) } public class ViewHolder{ public TextView text; public ImageView image; } private int[] images = { R.drawable.pic_1, R.drawable.pic_2, R.drawable.pic_3, R.drawable.pic_4, R.drawable.pic_5 }; private String[] name = { "This is first picture (1) " , "This is second picture (2)", "This is third picture (3)", "This is fourth picture (4)", " This is fifth picture (5)" }; public View getView(int position, View convertView, ViewGroup parent) { ImageView i = getImageView(); int itemPos = (position % images.length); try { i.setImageResource(images[itemPos]); ((BitmapDrawable) i.getDrawable()). setAntiAlias (true); } catch (OutOfMemoryError e) { Log.e("InfiniteGalleryAdapter", "Out of memory creating imageview. Using empty view.", e); } View vi=convertView; ViewHolder holder; if(convertView==null){ vi = inflater.inflate(R.layout.gallery_items, null); holder=new ViewHolder(); holder.text=(TextView)vi.findViewById(R.id.textView1); holder.image=(ImageView)vi.findViewById(R.id.image); vi.setTag(holder); } else { holder=(ViewHolder)vi.getTag(); } holder.text.setText(name[itemPos]); final int stub_id=images[itemPos]; holder.image.setImageResource(stub_id); return vi; } private ImageView getImageView() { ImageView i = new ImageView(mContext); return i; } } class InfiniteGallery extends Gallery { **//red mark here (InfiniteGallery)** public InfiniteGallery(Context context) { super(context); init(); } public InfiniteGallery(Context context, AttributeSet attrs) { super(context, attrs); init(); } public InfiniteGallery(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(); } private void init(){ // These are just to make it look pretty setSpacing(25); setHorizontalFadingEdgeEnabled(false); } public void setResourceImages(int[] name){ setAdapter(new InfiniteGalleryAdapter(getContext(), name)); setSelection((getCount() / 2)); } } 您正在获得这些红色标记，因为这些类已在您之前的课程中定义过。 Java不会让重复的名称。 此外，您似乎正在尝试为每个Actvitiy定义相同的类，这是多余的。
只需从SecondActivity java文件中完全删除这两个类，因为它们已在先前的活动中定义。 我建议你制作一个单独的包，其中定义适配器和InfiniteGallery并保持重用。
public class SecondCity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Boolean customTitleSupported = requestWindowFeature(Window.FEATURE_CUSTOM_TITLE); // Set the layout to use setContentView(R.layout.main); if (customTitleSupported) { getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.custom_title); TextView tv = (TextView) findViewById(R.id.tv); Typeface face=Typeface.createFromAsset(getAssets(),"BFantezy.ttf"); tv.setTypeface(face); tv.setText("MY PICTURES"); } InfiniteGallery galleryOne = (InfiniteGallery) findViewById(R.id.galleryOne); galleryOne.setAdapter(new InfiniteGalleryAdapter(this)); } }
您甚至可能在同一文件夹中的某个其他文件上定义了具有相同名称的类。 哪个可能导致此错误。
使用Ctrl + H – > Java搜索 – >搜索类型它将告诉您重复的类在哪里。