Android初级之组件基础11-ImageSwitcher

ImageSwitcher，类似于TextSwitcher，只不过对应的View是ImageView。通过ImageSwitcher，我们可以切换显示的图片，做出简单的幻灯片效果。我们经常将ImageSwitcher与Gallery结合使用，做出相册的效果

1.常用属性与方法

2.实例

布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">

<ImageSwitcher android:id="@id/isBase"
android:layout_width="fill_parent" android:layout_height="wrap_content"/>
<Button android:id="@id/btnBaseImageSwitcher"
android:layout_width="fill_parent" android:layout_height="wrap_content"
android:text="点击变幻图片" android:hint="以动画形式变换图片"/>
</LinearLayout>

代码：

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher.ViewFactory;
import cn.youtous.R;

public class BaseImageSwitcher extends Activity {
private ImageSwitcher isBase;
private Button btnBaseImageSwitcher;
private int mIndex = 0;

private int[] mImages = {
R.drawable.carlogo_52design_01, R.drawable.carlogo_52design_06, R.drawable.carlogo_52design_09,
R.drawable.carlogo_52design_12, R.drawable.carlogo_52design_19, R.drawable.carlogo_52design_21,
R.drawable.carlogo_52design_27, R.drawable.carlogo_52design_29, R.drawable.carlogo_52design_31
};

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
this.setContentView(R.layout.base_imageswitcher);
isBase = (ImageSwitcher)findViewById(R.id.isBase);
isBase.setFactory(new IsBaseFactory());
isBase.setImageResource(mImages[mIndex]);
isBase.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.slide_in_left));
isBase.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.slide_out_right));

btnBaseImageSwitcher = (Button)findViewById(R.id.btnBaseImageSwitcher);
btnBaseImageSwitcher.setOnClickListener(new IsBaseClickListener());
}

class IsBaseFactory implements ViewFactory {
@Override
public View makeView() {
ImageView iv = new ImageView(BaseImageSwitcher.this);
//...可在此处对ImageView进行样式定义
return iv;
}
}

class IsBaseClickListener implements View.OnClickListener {
@Override
public void onClick(View v) {
if(mIndex<mImages.length-1){
mIndex++;
}else{
mIndex = 0;
}
//设置ImageSwitcher显示的图片
isBase.setImageResource(mImages[mIndex]);
}
}
}