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      1 /*
      2  * Copyright (C) 2007 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.example.android.apis.view;
     18 
     19 import com.example.android.apis.R;
     20 
     21 import android.app.Activity;
     22 import android.content.Context;
     23 import android.content.res.TypedArray;
     24 import android.os.Bundle;
     25 import android.view.ContextMenu;
     26 import android.view.MenuItem;
     27 import android.view.View;
     28 import android.view.ViewGroup;
     29 import android.view.ContextMenu.ContextMenuInfo;
     30 import android.widget.AdapterView;
     31 import android.widget.BaseAdapter;
     32 import android.widget.Gallery;
     33 import android.widget.ImageView;
     34 import android.widget.Toast;
     35 import android.widget.AdapterView.AdapterContextMenuInfo;
     36 import android.widget.AdapterView.OnItemClickListener;
     37 
     38 public class Gallery1 extends Activity {
     39 
     40     @Override
     41     public void onCreate(Bundle savedInstanceState) {
     42         super.onCreate(savedInstanceState);
     43         setContentView(R.layout.gallery_1);
     44 
     45         // Reference the Gallery view
     46         Gallery g = (Gallery) findViewById(R.id.gallery);
     47         // Set the adapter to our custom adapter (below)
     48         g.setAdapter(new ImageAdapter(this));
     49 
     50         // Set a item click listener, and just Toast the clicked position
     51         g.setOnItemClickListener(new OnItemClickListener() {
     52             public void onItemClick(AdapterView parent, View v, int position, long id) {
     53                 Toast.makeText(Gallery1.this, "" + position, Toast.LENGTH_SHORT).show();
     54             }
     55         });
     56 
     57         // We also want to show context menu for longpressed items in the gallery
     58         registerForContextMenu(g);
     59     }
     60 
     61     @Override
     62     public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
     63         menu.add(R.string.gallery_2_text);
     64     }
     65 
     66     @Override
     67     public boolean onContextItemSelected(MenuItem item) {
     68         AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
     69         Toast.makeText(this, "Longpress: " + info.position, Toast.LENGTH_SHORT).show();
     70         return true;
     71     }
     72 
     73     public class ImageAdapter extends BaseAdapter {
     74         int mGalleryItemBackground;
     75 
     76         public ImageAdapter(Context c) {
     77             mContext = c;
     78             // See res/values/attrs.xml for the <declare-styleable> that defines
     79             // Gallery1.
     80             TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);
     81             mGalleryItemBackground = a.getResourceId(
     82                     R.styleable.Gallery1_android_galleryItemBackground, 0);
     83             a.recycle();
     84         }
     85 
     86         public int getCount() {
     87             return mImageIds.length;
     88         }
     89 
     90         public Object getItem(int position) {
     91             return position;
     92         }
     93 
     94         public long getItemId(int position) {
     95             return position;
     96         }
     97 
     98         public View getView(int position, View convertView, ViewGroup parent) {
     99             ImageView i = new ImageView(mContext);
    100 
    101             i.setImageResource(mImageIds[position]);
    102             i.setScaleType(ImageView.ScaleType.FIT_XY);
    103             i.setLayoutParams(new Gallery.LayoutParams(136, 88));
    104 
    105             // The preferred Gallery item background
    106             i.setBackgroundResource(mGalleryItemBackground);
    107 
    108             return i;
    109         }
    110 
    111         private Context mContext;
    112 
    113         private Integer[] mImageIds = {
    114                 R.drawable.gallery_photo_1,
    115                 R.drawable.gallery_photo_2,
    116                 R.drawable.gallery_photo_3,
    117                 R.drawable.gallery_photo_4,
    118                 R.drawable.gallery_photo_5,
    119                 R.drawable.gallery_photo_6,
    120                 R.drawable.gallery_photo_7,
    121                 R.drawable.gallery_photo_8
    122         };
    123     }
    124 
    125 }
    126