【Android】使用Gallery组件实现图片播放预览

来源：互联网发布：光纤分布数据接口fddi 编辑：程序博客网时间：2024/05/21 08:58

Gallery(画廊)扩展了LayoutParams，以此提供可以容纳当前的转换信息和先前的位置转换信息的场所。

Activity

[java] view plaincopy
package com.app.test01;  
  
  
  
  
  
import com.app.adapter.ImageAdapter;  
  
import android.app.Activity;  
import android.os.Bundle;  
import android.view.View;  
import android.widget.AdapterView;  
import android.widget.Gallery;  
import android.widget.ImageView;  
  
public class GalleryTest extends Activity{  
    Gallery gallery;  
    ImageView imagedemo;  
    ImageAdapter iAdapter = new ImageAdapter(this);  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        // TODO Auto-generated method stub  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_gallery);  
          
        gallery = (Gallery) findViewById(R.id.gallery1);  
        imagedemo = (ImageView) findViewById(R.id.imagedemo);  
          
        gallery.setAdapter(iAdapter);  
        gallery.setOnItemClickListener(new AdapterView.OnItemClickListener() {  
            @Override  
            public void onItemClick(AdapterView<?> parent, View view,  
                    int position, long id) {  
                // TODO Auto-generated method stub  
                Integer[] iViews = iAdapter.getmImageIds();  
                imagedemo.setImageDrawable(getResources().getDrawable(iViews[position]));  
            }  
        });  
    }  
}  

BaseAdapter适配器

[java] view plaincopy
package com.app.adapter;  
  
import com.app.test01.R;  
  
import android.content.Context;  
import android.content.res.TypedArray;  
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 mContext;  
    public ImageAdapter(Context c) {  
        mContext = c;  
    }  
  
    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 i = new ImageView(mContext);  
        i.setImageResource(mImageIds[position]);  
        i.setLayoutParams(new Gallery.LayoutParams(150,75));  
        return i;  
    }  
  
    public Integer[] getmImageIds() {  
        return mImageIds;  
    }  
  
    public void setmImageIds(Integer[] mImageIds) {  
        this.mImageIds = mImageIds;  
    }  
  
    private Integer[] mImageIds = {  
            R.drawable.image01,  
            R.drawable.image02,  
            R.drawable.image03,  
            R.drawable.image04,  
            R.drawable.image05,  
            R.drawable.image06,  
            R.drawable.image07,  
            R.drawable.image08,  
            R.drawable.image09,  
            R.drawable.image01,  
            R.drawable.image02,  
            R.drawable.image03,  
            R.drawable.image04,  
            R.drawable.image05,  
            R.drawable.image06,  
            R.drawable.image07,  
            R.drawable.image08,  
            R.drawable.image09,  
    };  
}  

XML布局文件

[html] view plaincopy
<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:layout_width="match_parent"  
    android:layout_height="match_parent"  
    android:orientation="vertical" >  
  
    <Gallery  
        android:id="@+id/gallery1"  
        android:layout_width="match_parent"  
        android:layout_height="wrap_content"  
        android:layout_marginTop="50dp" />  
  
    <RelativeLayout  
        android:layout_width="match_parent"  
        android:layout_height="match_parent"  
        android:gravity="center">  
          
        <ImageView  
            android:id="@+id/imagedemo"  
            android:layout_width="wrap_content"  
            android:layout_height="wrap_content"  
            android:src="@drawable/image01" />  
    </RelativeLayout>  
  
</LinearLayout>  

效果图

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