Android BaseAdapter和ContextMenu

大家好，我的社区

基本上，我的图库使用gridView+imageView显示一些图像

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" android:layout_height="fill_parent">

    <GridView android:id="@+id/PhoneImageGrid"
            android:layout_width="fill_parent" android:layout_height="fill_parent"
            android:numColumns="auto_fit" android:verticalSpacing="12dp"
            android:horizontalSpacing="12dp" android:columnWidth="90dp"
            android:stretchMode="columnWidth" android:gravity="center" />

        <ImageView android:id="@+id/thumbImage" android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:layout_centerInParent="true" 

            android:scaleType="centerCrop"
            />

我的适配器（删除了一些无用的线路）

  public class ImageAdapter extends BaseAdapter {

    private Albums albums;
    private Context context;
    private LayoutInflater inflater;     



    public ImageAdapter(Context context, Albums albums) {

        this.albums = albums;
        this.context = context;
        inflater = (LayoutInflater)context.getSystemService (Context.LAYOUT_INFLATER_SERVICE);
        if(albums.getAlbumsListSize() == 0) {
            Toast.makeText(context, "There is no album to display", Toast.LENGTH_LONG).show();
        }
    }




    public View getView(final int position, View view, ViewGroup parent) {

        ViewHolder holder;

        if (view == null) {       
            holder = new ViewHolder();       
            view = inflater.inflate(R.layout.galleryitem, null);       
            holder.imageview = (ImageView) view.findViewById(R.id.thumbImage);        
            holder.checkbox = (CheckBox) view.findViewById(R.id.itemCheckBox); 
            holder.textview = (TextView) view.findViewById(R.id.album_name); 
            holder.checkbox.setChecked(true);
            //Bitmap loadingBM = BitmapFactory.decodeResource(context.getResources(),R.drawable.loading_image);
            //holder.imageview.setImageBitmap(loadingBM);
            view.setTag(holder);
        }

        else {
            holder = (ViewHolder) view.getTag();
        }

        holder.imageview.setClickable(true);


        holder.imageview.setOnLongClickListener(new OnLongClickListener() {


            public boolean onLongClick(View v) {

                Log.v(TAG,"onLongClick ok !");
                return false;
            }

        });


        imageDownloader.download(this.context, albums.getAllAlbums().get(position).getThumbnailUri(), holder.imageview);            


        return view;
    }

问题:

setOnLongClickListener工作正常，当我单击图像时，我的日志显示在logcat中，但是，如何为每个imageView创建菜单

显然，我只能在我的主要活动中覆盖onCreateContextMenu。我想我可以将每个ImageView传递给onCreateContextMenu（ContextMenu，View v，ContextMenuInfo menuInfo），但是如何传递呢

如果你能帮我解决这个问题，我将不胜感激

多谢各位

---

Florent Valdelievre

使用

GridView

调用

RegisterForContext菜单，而不是
ImageView
上的
setOnLongClickListener
。然后，实现
onCreateContextMenu
和
onContextItemSelected

下面是一个简单的
ListActivity
，向您展示它是如何工作的

public class GreetingActivity extends ListActivity {
  private static final String[] mGreetings = { "Hello", "Goodbye" };
  private static final String[] mPeople = { "Alice", "Bob", "Charlie" };

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
        android.R.layout.simple_list_item_1, mPeople);
    setListAdapter(adapter);
    ListView listView = getListView();
    registerForContextMenu(listView);
  }

  @Override
  public void onCreateContextMenu(ContextMenu menu, View v,
      ContextMenu.ContextMenuInfo menuInfo) {
    for (int i = 0; i < mGreetings.length; ++i) {
      String greeting = mGreetings[i];
      menu.add(v.getId(), i, ContextMenu.NONE, "Say " + greeting);
    }
  }

  @Override
  public boolean onContextItemSelected(MenuItem item) {
    AdapterView.AdapterContextMenuInfo menuInfo
        = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
    int adapterPosition = menuInfo.position;
    String person = mPeople[adapterPosition];

    int menuItemId = item.getItemId();
    String greeting = mGreetings[menuItemId];

    String msg = String.format("%s, %s!", greeting, person);
    Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();

    return true;
  }
}

公共类问候活动扩展了ListActivity{
私有静态最终字符串[]mGreetings={“你好”，“再见”}；
私有静态最终字符串[]mPeople={“Alice”、“Bob”、“Charlie”}；
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
ArrayAdapter=新的ArrayAdapter（此，
android.R.layout.simple_list_item_1，mPeople）；
setListAdapter（适配器）；
ListView ListView=getListView（）；
registerForContextMenu（列表视图）；
}
@凌驾
public void onCreateContextMenu（ContextMenu，视图v，
ContextMenu.ContextMenuInfo menuInfo）{
对于（int i=0；i
非常感谢@chiuki，它可以正常工作

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
    ...
final GridView imagegrid = (GridView) findViewById(R.id.PhoneImageGrid);                                        
registerForContextMenu(imagegrid);  
storedObjects.storeThumbnailsURI();     
_adapter = new ImageAdapter(activity,storedObjects.getAlbums());
imagegrid.setAdapter(_adapter); 
}


@Override
public void onCreateContextMenu(ContextMenu menu, View v,ContextMenuInfo menuInfo) {  
      AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
    Log.v("context menu","context menu");
    menu.setHeaderTitle("Context Menu");  
    menu.add(0, START_SLIDESHOW_ON_THIS_ALBUM, 0, "Start SlideShow for this Album");  
    menu.add(0, DOWNLOAD_WHOLE_ALBUM, 0, "Download this Album");  

}   

@Override
public boolean onContextItemSelected(MenuItem item) {
    AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
    switch (item.getItemId()) {

    case START_SLIDESHOW_ON_THIS_ALBUM:
        selectThisAlbumOnly(info);
        startSlideShow();   
    break;
    case DOWNLOAD_WHOLE_ALBUM:

    break;        
    }
    return true;
}   

在适配器中，确保没有任何设置Clickable=true

干杯

Florent
基本上，这是我尝试做的第一件事，但没有成功
`final GridView imagegrid=（GridView）findViewById（R.id.PhoneImageGrid）_adapter=newimageadapter（活动，getAlbums（））；设置适配器（_适配器）；imagegrid.setClickable（真）；registerForContextMenu（imagegrid）；`然后，我实现了
`@Override public void onCreateContextMenu（ContextMenu，View v，ContextMenuInfo menuInfo）{super.onCreateContextMenu（menu，v，menuInfo）；Log.v（“context menu”，“context menu”）；}`你知道为什么不调用onCreateContextMenu吗
谢谢您的意思是当您长按时，
onCreateContextMenu
不会被调用？确保从单个列表项中删除
设置LongClickListener
。
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
    ...
final GridView imagegrid = (GridView) findViewById(R.id.PhoneImageGrid);                                        
registerForContextMenu(imagegrid);  
storedObjects.storeThumbnailsURI();     
_adapter = new ImageAdapter(activity,storedObjects.getAlbums());
imagegrid.setAdapter(_adapter); 
}


@Override
public void onCreateContextMenu(ContextMenu menu, View v,ContextMenuInfo menuInfo) {  
      AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
    Log.v("context menu","context menu");
    menu.setHeaderTitle("Context Menu");  
    menu.add(0, START_SLIDESHOW_ON_THIS_ALBUM, 0, "Start SlideShow for this Album");  
    menu.add(0, DOWNLOAD_WHOLE_ALBUM, 0, "Download this Album");  

}   

@Override
public boolean onContextItemSelected(MenuItem item) {
    AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
    switch (item.getItemId()) {

    case START_SLIDESHOW_ON_THIS_ALBUM:
        selectThisAlbumOnly(info);
        startSlideShow();   
    break;
    case DOWNLOAD_WHOLE_ALBUM:

    break;        
    }
    return true;
}