Gallery View : Gallery « UI « Android

1. Android
2. UI
3. Gallery

Gallery View

   
/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.view;

import com.example.android.apis.R;

import android.app.Activity;
import android.content.Context;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.Toast;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.AdapterView.OnItemClickListener;

public class Gallery1 extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.gallery_1);

        // Reference the Gallery view
        Gallery g = (Gallery) findViewById(R.id.gallery);
        // Set the adapter to our custom adapter (below)
        g.setAdapter(new ImageAdapter(this));
        
        // Set a item click listener, and just Toast the clicked position
        g.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
                Toast.makeText(Gallery1.this, "" + position, Toast.LENGTH_SHORT).show();
            }
        });
        
        // We also want to show context menu for longpressed items in the gallery
        registerForContextMenu(g);
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
        menu.add(R.string.gallery_2_text);
    }
    
    @Override
    public boolean onContextItemSelected(MenuItem item) {
        AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
        Toast.makeText(this, "Longpress: " + info.position, Toast.LENGTH_SHORT).show();
        return true;
    }

    public class ImageAdapter extends BaseAdapter {
        private static final int ITEM_WIDTH = 136;
        private static final int ITEM_HEIGHT = 88;

        private final int mGalleryItemBackground;
        private final Context mContext;

        private final Integer[] mImageIds = {
                R.drawable.gallery_photo_1,
                R.drawable.gallery_photo_2,
                R.drawable.gallery_photo_3,
                R.drawable.gallery_photo_4,
                R.drawable.gallery_photo_5,
                R.drawable.gallery_photo_6,
                R.drawable.gallery_photo_7,
                R.drawable.gallery_photo_8
        };

        private final float mDensity;

        public ImageAdapter(Context c) {
            mContext = c;
            // See res/values/attrs.xml for the <declare-styleable> that defines
            // Gallery1.
            TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);
            mGalleryItemBackground = a.getResourceId(
                    R.styleable.Gallery1_android_galleryItemBackground, 0);
            a.recycle();

            mDensity = c.getResources().getDisplayMetrics().density;
        }

        public int getCount() {
            return mImageIds.length;
        }

        public Object getItem(int position) {
            return position;
        }

        public long getItemId(int position) {
            return position;
        }

        public View getView(int position, View convertView, ViewGroup parent) {
            ImageView imageView;
            if (convertView == null) {
                convertView = new ImageView(mContext);

                imageView = (ImageView) convertView;
                imageView.setScaleType(ImageView.ScaleType.FIT_XY);
                imageView.setLayoutParams(new Gallery.LayoutParams(
                        (int) (ITEM_WIDTH * mDensity + 0.5f),
                        (int) (ITEM_HEIGHT * mDensity + 0.5f)));
            
                // The preferred Gallery item background
                imageView.setBackgroundResource(mGalleryItemBackground);
            } else {
                imageView = (ImageView) convertView;
            }

            imageView.setImageResource(mImageIds[position]);

            return imageView;
        }
    }
}

//layout/gallery_1.xml


<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2007 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at
  
          http://www.apache.org/licenses/LICENSE-2.0
  
     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->

<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/layout2"
 android:orientation="vertical"
 android:layout_width="match_parent"
 android:layout_height="match_parent">
<Gallery  android:id="@+id/gallery"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
<EditText
 android:text="@+id/EditText01"
 android:id="@+id/EditText01"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"></EditText>
</LinearLayout>

   
    
    
  

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