图片按钮不可点击 - Android

Question

我无法弄清楚为什么我的按钮不可点击。我有一个gridview中的歌曲列表，当用户点击列表中的某个项目时，应用程序将把它们带到我的SongDetailFragment活动中，其中包含有关该歌曲的更多信息。我有一个星形按钮，如果数据库中的某首歌曲我想让它像这样btn_star_big_on，并且如果它不在数据库中，我希望它关闭btn_star_big_off。问题是当我运行我的应用程序时，我无法点击按钮。就好像它只是一个静态图像，因为用户应该能够打开和关闭它。

任何人都可以请指教如何解决这个问题？

Here是我得到了我的星号按钮：

这里是我的星号按钮的xml：

<ImageView 
    android:id="@+id/imgFavBtn" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:clickable="true" 
    android:contentDescription="@string/favourite" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    android:src="@android:drawable/btn_star_big_off" /> 

这里是我的详细信息片段：

public class SongDetailFragment extends Fragment implements LoaderManager.LoaderCallbacks<Cursor>{ 
    private Song song; 
    private static final int CURSOR_LOADER_ID = 0; 
    ImageView imgViewFavButton; 
    Boolean mIsFavourite; 

    public SongDetailFragment() { 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 

     View rootView = inflater.inflate(R.layout.song_fragment_detail, container, false); 


     Intent intent = getActivity().getIntent(); 
     if (intent != null && intent.hasExtra("song")) { 


      song = intent.getParcelableExtra("song"); 

      ((TextView) rootView.findViewById(R.id.detail_title_textview)) 
        .setText(song.getTitle()); 

      ((TextView)rootView.findViewById(R.id.detail_overview_textview)) 
        .setText(song.getDescription()); 


      ((TextView)rootView.findViewById(R.id.song_date_textview)) 
        .setText(song.getdate()); 




      ImageView imageView = (ImageView) rootView.findViewById(R.id.song_detail_poster_imageview); 
      Picasso.with(getActivity()).load(song.getPoster()).into(imageView); 
     } 

     imgViewFavButton = (ImageView) rootView.findViewById(R.id.imgFavBtn); 
     checkFavourites(song); 
     imgViewFavButton.setOnClickListener(new View.OnClickListener() 
     { 
      @Override 
      public void onClick(View v) 
      { 

       Cursor c = 
         getActivity().getContentResolver().query(songContract.songEntry.CONTENT_URI, 
           new String[]{songContract.songEntry._ID}, 
           null, 
           null, 
           null); 

        insertData(song); 

       getLoaderManager().initLoader(CURSOR_LOADER_ID, null, songDetailFragment.this); 

      } 
     }); 

     return rootView; 
    } 


    public void insertData(song song){ 
     ContentValues songValues = new ContentValues(); 
     songValues.put(songContract.songEntry.COLUMN_ID, song.getsong_id()); 
     songValues.put(songContract.songEntry.COLUMN_IMAGE, song.getPoster()); 
     songValues.put(songContract.songEntry.COLUMN_TITLE, song.getTitle()); 
     songValues.put(songContract.songEntry.COLUMN_OVERVIEW, song.getDescription()); 
     songValues.put(songContract.songEntry.COLUMN_date, song.getdate()); 



     getActivity().getContentResolver().insert(songContract.songEntry.CONTENT_URI, 
       songValues); 

    } 


    private void checkFavourites(song song) { 
     Cursor c = 
       getActivity().getContentResolver().query(songContract.songEntry.CONTENT_URI, 
         null, 
         songContract.songEntry.COLUMN_ID + " = ?", 
         new String[]{song.getsong_id()}, 
         null); 

     if (c != null) { 
      c.moveToFirst(); 
      int index = c.getColumnIndex(songContract.songEntry.COLUMN_ID); 

      if (c.getCount() > 0 && c.getString(index).equals(song.getsong_id())) { 
       mIsFavourite = true; 
       imgViewFavButton.setImageResource(android.R.drawable.btn_star_big_on); 
      } 

      else{ 
       imgViewFavButton.setImageResource(android.R.drawable.btn_star_big_off); 
      } 
       c.close(); 

      } 



    } 


    @Override 
    public Loader<Cursor> onCreateLoader(int id, Bundle args){ 
     return new CursorLoader(getActivity(), 
       songContract.songEntry.CONTENT_URI, 
       null, 
       null, 
       null, 
       null); 
    } 

    @Override 
    public void onViewCreated(View view, Bundle savedInstanceState){ 
     super.onViewCreated(view, savedInstanceState); 
    } 


    // Set the cursor in our CursorAdapter once the Cursor is loaded 
    @Override 
    public void onLoadFinished(Loader<Cursor> loader, Cursor data) { 




    } 

    // reset CursorAdapter on Loader Reset 
    @Override 
    public void onLoaderReset(Loader<Cursor> loader){ 

    } 

} 

Answer 1

你必须实现一个selector说btn_selector.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
    <item android:drawable="@drawable/btn_star_big_on" android:state_selected="true"/> 
    <item android:drawable="@drawable/btn_star_big_off" android:state_selected="false"/> 
</selector> 

，并设置btn_selector为您ImageView按钮的背景壁纸

，并添加一行到onClickListener ..

imgViewFavButton.setOnClickListener(new View.OnClickListener() { 
    @Override 
    public void onClick(View v) { 
     imgViewFavButton.setSelected(!imgViewFavButton.isSelected()); 
     . 
     . 
     . 
    } 
}); 

Answer 2

看起来你当你想要一个ImageButton时，你正在使用ImageView。或者您可以将android:clickable="true"添加到XML中。