GalleryAdapter.java:
package com.example.test10_gallery;
import android.content.Context;import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
public class GalleryAdapter extends BaseAdapter {
private Context mContext;
//设置要展示的图片资源
int[] images = {R.drawable.f1, R.drawable.f2, R.drawable.f3, R.drawable.f4};
public GalleryAdapter(Context context) {
this.mContext = context;
}
@Override
public int getCount() {
return images.length;
}
@Override
public Object getItem(int i) {
return i;
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
//在此最好判断一下view是否为空
ImageView image = new ImageView(mContext);
image.setImageResource(images[i]);
image.setAdjustViewBounds(true);
//设置宽高
image.setLayoutParams(new Gallery.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
return image;
}
}
MainActivity.java:
package com.example.test10_gallery;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Gallery;
import android.widget.Toast;
public class MainActivity extends Activity {
GalleryAdapter galleryAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Gallery gallery = (Gallery) findViewById(R.id.gallery);
galleryAdapter = new GalleryAdapter(MainActivity.this);
gallery.setAdapter(galleryAdapter);
//相应的点击事件
gallery.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Toast.makeText(MainActivity.this, "您点击的是" + i, Toast.LENGTH_LONG).show();
}
});
}
}
activity_main.xml:
<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"
tools:context="${relativePackage}.${activityClass}" >
<Gallery
android:id="@+id/gallery"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
