ImageSwitcherProject 圖片瀏覽器

MyDemo.java

package com.jackie.imageswitcherproject;


import android.R.color;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
import android.widget.ViewSwitcher.ViewFactory;


public class MainActivity<MyDemo> extends Activity {
private Button butPrevious=null;
private Button butNext=null;
private ImageSwitcher myImageSwitcher=null;
private int imgRes[]=new int[]{R.drawable.pic_2,R.drawable.pic_3,
R.drawable.pic_4,R.drawable.pic_5,R.drawable.pic_7};
private int foot=0; //表示當前已經顯示的數組圖片的腳標


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.activity_main);
this.butPrevious=(Button) super.findViewById(R.id.butPrevious);
this.butNext=(Button) super.findViewById(R.id.butNext);
this.myImageSwitcher=(ImageSwitcher) super.findViewById(R.id.myImageSwitcher);

this.myImageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_in));
this.myImageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));

this.myImageSwitcher.setFactory(new ViewFactoryImpl());
this.myImageSwitcher.setImageResource(MainActivity.this.imgRes[this.foot++]);

this.butPrevious.setOnClickListener(new OnClickListenerPrevious());
this.butNext.setOnClickListener(new OnClickListenerNext());
}
private class ViewFactoryImpl implements ViewFactory{


@Override
public View makeView() {
            ImageView img=new ImageView(MainActivity.this);
            img.setBackgroundColor(color.black);
            img.setScaleType(ImageView.ScaleType.CENTER);
            img.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT,
            LayoutParams.FILL_PARENT));
return img;
}}
    
private class OnClickListenerPrevious implements OnClickListener{


@Override
public void onClick(View arg0) {
MainActivity.this.checkButEnable();
if(foot==imgRes.length){
foot=imgRes.length-1;
}
MainActivity.this.myImageSwitcher
.setImageResource(MainActivity.this.imgRes[MainActivity.this.foot--]);

}

}
private class OnClickListenerNext implements OnClickListener{


@Override
public void onClick(View arg0) {
MainActivity.this.checkButEnable();
if(foot==-1){
foot=0;
}
MainActivity.this.myImageSwitcher
.setImageResource(MainActivity.this.imgRes[MainActivity.this.foot++]);
 
}

}
private void checkButEnable(){
if(this.foot<this.imgRes.length-1){
this.butNext.setEnabled(true);
}else{
this.butNext.setEnabled(false);
}
if(this.foot==0){
this.butPrevious.setEnabled(false);
}else{
this.butPrevious.setEnabled(true);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}

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=".MainActivity" >


    <ImageSwitcher
        android:id="@+id/myImageSwitcher"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
       />
    <Button
        android:id="@+id/butPrevious"
        android:layout_below="@id/myImageSwitcher"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:enabled="false"
        android:text="上一張圖片"/>
    <Button
        android:id="@+id/butNext"
        android:layout_toRightOf="@id/butPrevious"
        android:layout_below="@id/myImageSwitcher"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:enabled="true"
        android:text="下一張圖片"/>


</RelativeLayout>