Android 使用Gallery组件实现图片播放预览

Activity

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

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

<?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>