Gallery简单应用

首先要自定义一个adapter

package com.example.gallerydemo;

import android.content.Context;
import android.graphics.Color;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.LinearLayout.LayoutParams;

public class GalleryAdapter extends BaseAdapter {
    private Context mycon;
    private int[] data;

    public GalleryAdapter(Context mycon, int[] data) {
        this.mycon = mycon;
        this.data = data;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return data.length;
    }

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

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView img = new ImageView(mycon);
        img.setBackgroundColor(Color.BLACK);
        img.setImageResource(data[position]);//设置文件资源
        img.setLayoutParams(new Gallery.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
        return img;
    }

}

<RelativeLayout 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: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=".MainActivity" >

    <Gallery
        android:id="@+id/ga"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</RelativeLayout>

布局文件

package com.example.gallerydemo;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.Gallery;

public class MainActivity extends Activity {
    private Gallery ga;
    private int[] data = { R.drawable.addpeople, R.drawable.ic_launcher,
            R.drawable.star_empty, R.drawable.star_full, R.drawable.tb,
            R.drawable.tb2 };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ga = (Gallery) findViewById(R.id.ga);
        ga.setAdapter(new GalleryAdapter(MainActivity.this, data));
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}