显示图像基于Gridview选择从以前的活动

Question

我目前有一个工作网格视图显示一些缩略图。目前，当你选择一张图片时，它会保存一张较大分辨率的图片作为壁纸。

我想做的是打开一个新的意图，然后显示基于GridView位置点击的全分辨率图像。我不知道如何从新的活动/意图中找到点击的位置。

这是我的主活动

public class test extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    GridView gridview = (GridView) findViewById(R.id.gridview);
    gridview.setAdapter(new ImageAdapter(getApplicationContext()));
    gridview.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
            Toast.makeText(test.this, "" + position + "" + id, Toast.LENGTH_SHORT).show();
            //Make a Bitmap from the Resource
            ImageAdapter i = (ImageAdapter)parent.getAdapter();
            Bitmap mBitmap = BitmapFactory.decodeResource(getResources(),(int)i.getItemId(position));
            //Get the WallpaperManager
            WallpaperManager myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());
            try {
                //Set the clicked bitmap
                myWallpaperManager.setBitmap(mBitmap);
                Toast.makeText(test.this, "Wallpaper set", Toast.LENGTH_SHORT).show();
            } catch (IOException e) {
                Toast.makeText(test.this, "Error setting wallpaper", Toast.LENGTH_SHORT).show();
            }
        }
    });
}

}

ImageAdapter

public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
    mContext = c;
}
public int getCount() {
    return mThumbIds.length;
}
public Object getItem(int position) {
    return null;
}
public long getItemId(int position) {
    return mFullSizeIds[position];
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
    ImageView imageView;
    if (convertView == null) {  // if it's not recycled, initialize some attributes
        imageView = new ImageView(mContext);
        imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
        imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        imageView.setPadding(8, 8, 8, 8);
    } else {
        imageView = (ImageView) convertView;
    }
    imageView.setImageResource(mThumbIds[position]);
    return imageView;
}
// references to our images
private Integer[] mThumbIds = {
        R.drawable.sample_1, R.drawable.sample_2,
        R.drawable.sample_3, R.drawable.sample_4,
        R.drawable.sample_5, R.drawable.sample_6,
        R.drawable.sample_7 
};

private Integer[] mFullSizeIds = {
        R.drawable.wallpaper1,
        R.drawable.wallpaper2,
        R.drawable.wallpaper3,
        R.drawable.wallpaper4,
        R.drawable.wallpaper5,
        R.drawable.wallpaper6,
        R.drawable.wallpaper7
        };

}

和空白FullView模板

public class FullView extends Activity {
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.fullview);
ImageView imageview;
    imageview.setImageResource(mFullSizeIds[**]) <--- How to set ** to what GridView position was selected?

}

}

我还没有真正在FullView活动中写任何东西，由于不知道如何传递从GridView在这个新活动中点击的位置。

(我还没有在我的主要活动写意图代码，所以你可以看到它目前是如何工作的)

我如何传递gridview的位置，选择到新的活动?

Answer 1

在您的事件处理程序(OnItemClickListener)中，您可以获得图像的资源ID为mThumbs[position]。