我設置屏幕的大小為800*600
/*
*ImageSwitcherGallery.java
*/
package android.study_layout;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.Window;
import android.view.animation.AnimationUtils;
import android.widget.*;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ViewSwitcher.ViewFactory;
public class ImageSwitcherGallery extends Activity implements
OnItemSelectedListener, ViewFactory {
private ImageSwitcher image_switcher;
private Gallery gallery;
private Integer[] mThumbIds = { R.drawable.a1, R.drawable.a2,
R.drawable.a3, R.drawable.a4, R.drawable.a5,
};
private Integer[] mImageIds = { R.drawable.a1, R.drawable.a2,
R.drawable.a3, R.drawable.a4, R.drawable.a5, };
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.image_switcher_gallery);
image_switcher = (ImageSwitcher) findViewById(R.id.switcher);
image_switcher.setFactory(this);
image_switcher.setInAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_in));
image_switcher.setOutAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_out));
gallery = (Gallery) findViewById(R.id.gallery);
gallery.setAdapter(new ImageAdapter(this));
gallery.setOnItemSelectedListener(this);
}
@Override
public View makeView() {
ImageView image = new ImageView(this);
image.setBackgroundColor(0xFF000000);
image.setScaleType(ImageView.ScaleType.FIT_XY);
image.setLayoutParams(new ImageSwitcher.LayoutParams(
LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
return image;
}
public class ImageAdapter extends BaseAdapter {
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.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 image = new ImageView(mContext);
image.setImageResource(mThumbIds[position]);
image.setAdjustViewBounds(true);
image.setLayoutParams(new Gallery.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
return image;
}
private Context mContext;
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position,
long id) {
ImageSwitcher image_switcher = (ImageSwitcher) findViewById(R.id.switcher);
image_switcher.setImageResource(mImageIds[position]);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
}
xml文件
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageSwitcher
android:id="@+id/switcher"
android:layout_width="match_parent"
android:layout_height="450dip"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
/>
<Gallery
android:id="@+id/gallery"
android:layout_width="fill_parent"
android:layout_height="120dip"
android:background="#55000000"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true"
android:gravity="center_vertical"
android:spacing="30dip"
/>
</RelativeLayout>