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![](https://img.laitimes.com/img/9ZDMuAjOiMmIsIjOiQnIsIyZwpmLzUTN5IjM0EjM3ITMxgTMwIzLc52YucWbp5GZzNmLn9Gbi1yZtl2Lc9CX6MHc0RHaiojIsJye.jpg)
Gallery能夠水準方向顯示其内容,一般用來浏覽圖檔,被選中的選項位于中間,并且可以響應事件顯示資訊,下面結合ImageSwitcher元件來實作一個通過縮略圖來浏覽照片的程式,代碼如下:
Activity:
package com.lovo;
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.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher.ViewFactory;
public class TestGalleryActivity extends Activity {
// 聲明ImageSwitcher
private ImageSwitcher mSwitcher;
// 圖檔數組ID
private int[] m = { R.drawable.image1, R.drawable.image2,
R.drawable.image3, R.drawable.image4, R.drawable.image5,
R.drawable.image6, R.drawable.image7 };
@Override
protected void onCreate(Bundle savedInstanceState) {
// 設定視窗特征無标題
// requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// 獲得ImageSwitcher對象
mSwitcher = (ImageSwitcher) findViewById(R.id.swither);
// 為ImageSwitcher設定工廠
mSwitcher.setFactory(new ViewFactory() {
@Override
public View makeView() {
// 建立imageView對象
ImageView imageView = new ImageView(TestGalleryActivity.this);
// 設定背景顔色
imageView.setBackgroundColor(0xFF000000);
// 設定精度類型
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
// 設定布局參數
imageView.setLayoutParams(new ImageSwitcher.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
return imageView;
}
});
// 設定出現和離開的動畫效果
mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_in));
mSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_out));
// 獲得Gallery對象
Gallery gallery = (Gallery) findViewById(R.id.gallery);
gallery.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// 設定圖檔資源
mSwitcher.setImageResource(m[arg2]);
}
});
// 為Gallery添加擴充卡
gallery.setAdapter(new ImageAdapter(this));
}
class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context context) {
mContext = context;
}
@Override
public int getCount() {
return m.length;
}
@Override
public Object getItem(int arg0) {
return arg0;
}
@Override
public long getItemId(int arg0) {
return arg0;
}
@Override
public View getView(int arg0, View arg1, ViewGroup arg2) {
// 執行個體化ImageView對象
ImageView imageView = new ImageView(mContext);
// 設定圖檔資源
imageView.setImageResource(m[arg0]);
// 設定邊界對齊
imageView.setAdjustViewBounds(true);
// 設定布局參數
imageView.setLayoutParams(new Gallery.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
// 設定背景資源
imageView.setBackgroundResource(R.drawable.about_background_land);
return imageView;
}
}
}
布局XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageSwitcher
android:id="@+id/swither"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" >
</ImageSwitcher>
<Gallery
android:id="@+id/gallery"
android:layout_width="fill_parent"
android:layout_height="60dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:background="#55000000"
android:gravity="center_vertical"
android:spacing="16dp" >
</Gallery>
</RelativeLayout>
附上圖檔效果: