Android基础TOP6_2:Gallery +Image完成画廊

Activity：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.top6_2.MainActivity" >
<Gallery 
    android:id="@+id/gly"
    android:layout_height="wrap_content"
    android:layout_width="fill_parent"
    android:animationDuration="1000"
    android:spacing="20dp"
    android:unselectedAlpha="0.5"
     />
   <ImageView 
       android:id="@+id/img"
       android:layout_height="wrap_content"
       android:layout_width="wrap_content"
       />

</LinearLayout>

JAVA:

MinActivity:

package com.example.top6_2;

import android.R.integer;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Gallery;
import android.widget.ImageView;


public class MainActivity extends Activity {
    private Gallery gal;
    private ImageView iv;
    private ImageAdapter adapter;  
    private static final int[]  imgslds={
            R.drawable.bjl,
            R.drawable.dfhgc,
            R.drawable.fg,
            R.drawable.gj
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
   iv=(ImageView) findViewById(R.id.img);
   gal=(Gallery) findViewById(R.id.gly);
   adapter=new ImageAdapter(this);
   gal.setAdapter(adapter);
    gal.setOnItemSelectedListener(gaILidstener);
    }
        private Gallery.OnItemSelectedListener gaILidstener=new Gallery.OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> parent, View view,
                int position, long id) {
            // TODO Auto-generated method stub
            iv.setImageResource(imgslds[position]);
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {
            // TODO Auto-generated method stub
            
        }
    };
    }

 ImagrAdapter:

package com.example.top6_2;

import android.R.integer;
import android.content.Context;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;

public class ImageAdapter extends BaseAdapter {
    private Context context;
    
    private static final int[]  imgslds={
        R.drawable.bjl,
        R.drawable.dfhgc,
        R.drawable.fg,
        R.drawable.gj
};
    public ImageAdapter(Context c){
        context=c;
        
    }
    public int getCount() {
        // TODO Auto-generated method stub
        //
        return imgslds.length;
        
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        ImageView iv=new ImageView(context);
        iv.setImageResource(imgslds[position]);
        iv.setScaleType(ImageView.ScaleType.FIT_CENTER);
        iv.setLayoutParams(new Gallery.LayoutParams(120,80));
                    return iv; 
    }

}

效果图：