使用增強型圖庫顯示圖像

Question

我試圖搜索解決方案，但仍無法解決問題，並且我的R.java無法生成R.id.picture。我可以知道我做錯了嗎？

/** 
* PicSelectActivity presents image gallery - user can select new images to 
* Display within scrolling thumbnail gallery - user can select individual image 
* To display at larger size 
* 
* Sue Smith Mobiletuts+ Tutorial - Importing and Displaying Images with the 
* Android Gallery June 2012 
*/ 

public class FxPhoto extends Activity { 

    // variable for selection intent 
    private final int PICKER = 1; 
    // variable to store the currently selected image 
    private int currentPic = 0; 
    // adapter for gallery view 
    private PicAdapter imgAdapt; 
    // gallery object 
    private Gallery picGallery; 
    // image view for larger display 
    private ImageView picView; 

    /** 
    * instantiate the interactive gallery 
    */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 

     /* 
     * When the user clicks a thumbnail in the gallery it is displayed at 
     * larger size 
     * 
     * When the user long-clicks a thumbnail they are taken to their chosen 
     * image selection activity, either the Android image gallery or a file 
     * manager application - on returning the chosen image is displayed 
     * within the thumbnail gallery and larger image view 
     */ 

     // call superclass method and set main content view 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     // get the large image view 
     picView = (ImageView) findViewById(**R.id.picture**); 

     // get the gallery view 
     picGallery = (Gallery) findViewById(**R.id.gallery**); 

     // create a new adapter 
     imgAdapt = new PicAdapter(this); 
     // set the gallery adapter 
     picGallery.setAdapter(imgAdapt); 

     // set long click listener for each gallery thumbnail item 
     picGallery.setOnItemLongClickListener(new OnItemLongClickListener() { 
      // handle long clicks 
      public boolean onItemLongClick(AdapterView<?> parent, View v, 
        int position, long id) { 
       // update the currently selected position so that we assign the 
       // imported bitmap to correct item 
       currentPic = position; 
       // take the user to their chosen image selection app (gallery or 
       // file manager) 
       Intent pickIntent = new Intent(); 
       pickIntent.setType("image/*"); 
       pickIntent.setAction(Intent.ACTION_GET_CONTENT); 
       // we will handle the returned data in onActivityResult 
       startActivityForResult(
         Intent.createChooser(pickIntent, "Select Picture"), 
         PICKER); 
       return true; 
      } 
     }); 

     // set the click listener for each item in the thumbnail gallery 
     picGallery.setOnItemClickListener(new OnItemClickListener() { 
      // handle clicks 
      public void onItemClick(AdapterView<?> parent, View v, 
        int position, long id) { 
       // set the larger image view to display the chosen bitmap 
       // calling method of adapter class 
       picView.setImageBitmap(imgAdapt.getPic(position)); 
      } 
     }); 
    } 

    /** 
    * Base Adapter subclass creates Gallery view - provides method for adding 
    * new images from user selection - provides method to return bitmaps from 
    * array 
    * 
    */ 
    public class PicAdapter extends BaseAdapter { 

     // use the default gallery background image 
     int defaultItemBackground; 

     // gallery context 
     private Context galleryContext; 

     // array to store bitmaps to display 
     private Bitmap[] imageBitmaps; 
     // placeholder bitmap for empty spaces in gallery 
     Bitmap placeholder; 

     // constructor 
     public PicAdapter(Context c) { 

      // instantiate context 
      galleryContext = c; 

      // create bitmap array 
      imageBitmaps = new Bitmap[10]; 
      // decode the placeholder image 
      placeholder = BitmapFactory.decodeResource(getResources(), 
        R.drawable.ic_launcher); 

      // set placeholder as all thumbnail images in the gallery initially 
      for (int i = 0; i < imageBitmaps.length; i++) 
       imageBitmaps[i] = placeholder; 

      // get the styling attributes - use default Andorid system resources 
      TypedArray styleAttrs = galleryContext 
        .obtainStyledAttributes(R.**styleable**.PicGallery); 
      // get the background resource 
      defaultItemBackground = styleAttrs.getResourceId(
        R.**styleable**.PicGallery_android_galleryItemBackground, 0); 
      // recycle attributes 
      styleAttrs.recycle(); 
     } 

     // BaseAdapter methods 

     // return number of data items i.e. bitmap images 
     public int getCount() { 
      return imageBitmaps.length; 
     } 

     // return item at specified position 
     public Object getItem(int position) { 
      return position; 
     } 

     // return item ID at specified position 
     public long getItemId(int position) { 
      return position; 
     } 

     // get view specifies layout and display options for each thumbnail in 
     // the gallery 
     public View getView(int position, View convertView, ViewGroup parent) { 

      // create the view 
      ImageView imageView = new ImageView(galleryContext); 
      // specify the bitmap at this position in the array 
      imageView.setImageBitmap(imageBitmaps[position]); 
      // set layout options 
      imageView.setLayoutParams(new Gallery.LayoutParams(300, 200)); 
      // scale type within view area 
      imageView.setScaleType(ImageView.ScaleType.FIT_CENTER); 
      // set default gallery item background 
      imageView.setBackgroundResource(defaultItemBackground); 
      // return the view 
      return imageView; 
     } 

     // custom methods for this app 

     // helper method to add a bitmap to the gallery when the user chooses 
     // one 
     public void addPic(Bitmap newPic) { 
      // set at currently selected index 
      imageBitmaps[currentPic] = newPic; 
     } 

     // return bitmap at specified position for larger display 
     public Bitmap getPic(int posn) { 
      // return bitmap at posn index 
      return imageBitmaps[posn]; 
     } 
    } 

    /** 
    * Handle returning from gallery or file manager image selection - import 
    * the image bitmap 
    */ 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 

     if (resultCode == RESULT_OK) { 
      // check if we are returning from picture selection 
      if (requestCode == PICKER) { 

       // the returned picture URI 
       Uri pickedUri = data.getData(); 

       // declare the bitmap 
       Bitmap pic = null; 
       // declare the path string 
       String imgPath = ""; 

       // retrieve the string using media data 
       String[] medData = { MediaStore.Images.Media.DATA }; 
       // query the data 
       Cursor picCursor = managedQuery(pickedUri, medData, null, null, 
         null); 
       if (picCursor != null) { 
        // get the path string 
        int index = picCursor 
          .getColumnIndexOrThrow(MediaStore.Images.Media.DATA); 
        picCursor.moveToFirst(); 
        imgPath = picCursor.getString(index); 
       } else 
        imgPath = pickedUri.getPath(); 

       // if and else handle both choosing from gallery and from file 
       // manager 

       // if we have a new URI attempt to decode the image bitmap 
       if (pickedUri != null) { 

        // set the width and height we want to use as maximum 
        // display 
        int targetWidth = 600; 
        int targetHeight = 400; 

        // sample the incoming image to save on memory resources 

        // create bitmap options to calculate and use sample size 
        BitmapFactory.Options bmpOptions = new BitmapFactory.Options(); 

        // first decode image dimensions only - not the image bitmap 
        // itself 
        bmpOptions.inJustDecodeBounds = true; 
        BitmapFactory.decodeFile(imgPath, bmpOptions); 

        // work out what the sample size should be 

        // image width and height before sampling 
        int currHeight = bmpOptions.outHeight; 
        int currWidth = bmpOptions.outWidth; 

        // variable to store new sample size 
        int sampleSize = 1; 

        // calculate the sample size if the existing size is larger 
        // than target size 
        if (currHeight > targetHeight || currWidth > targetWidth) { 
         // use either width or height 
         if (currWidth > currHeight) 
          sampleSize = Math.round((float) currHeight 
            /(float) targetHeight); 
         else 
          sampleSize = Math.round((float) currWidth 
            /(float) targetWidth); 
        } 
        // use the new sample size 
        bmpOptions.inSampleSize = sampleSize; 

        // now decode the bitmap using sample options 
        bmpOptions.inJustDecodeBounds = false; 

        // get the file as a bitmap 
        pic = BitmapFactory.decodeFile(imgPath, bmpOptions); 

        // pass bitmap to ImageAdapter to add to array 
        imgAdapt.addPic(pic); 
        // redraw the gallery thumbnails to reflect the new addition 
        picGallery.setAdapter(imgAdapt); 

        // display the newly selected image at larger size 
        picView.setImageBitmap(pic); 
        // scale options 
        picView.setScaleType(ImageView.ScaleType.FIT_CENTER); 
       } 
      } 
     } 
     // superclass method 
     super.onActivityResult(requestCode, resultCode, data); 
    } 
} 

Answer 1

我也遇到這樣的問題， 看看你的包 如果您發現類似進口android.R; 刪除該行。

Answer 2

這是有效的。

第1步：下載http://www.androidpeople.com/wp-content/uploads/2010/05/GalleryImageview.zip

第2步：運行，並與工作版本