1.看布局文
<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" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <ImageView android:id="@+id/imageView1" android:layout_width="240dp" android:layout_height="240dp" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:layout_marginTop="17dp" android:src="@drawable/xiaomi1" /> <ImageButton android:id="@+id/imageButton1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/imageView1" android:layout_below="@+id/imageView1" android:layout_marginLeft="22dp" android:padding="0dp" android:src="@drawable/ic_launcher" /> <ImageButton android:id="@+id/imageButton2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignRight="@+id/imageView1" android:layout_alignTop="@+id/imageButton1" android:layout_marginRight="17dp" android:padding="0dp" android:src="@drawable/ic_launcher" /> </RelativeLayout>
2.activity
package com.example.imagebutton; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.ImageButton; import android.widget.ImageView; public class MainActivity extends Activity { private ImageView ivwPicture = null; private ImageButton ibtnProv = null; private ImageButton ibtnNext = null; private Integer Images[] = {R.drawable.a,R.drawable.b,R.drawable.c,R.drawable.d,R.drawable.e}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ivwPicture = (ImageView)this.findViewById(R.id.imageView1); ibtnProv = (ImageButton)this.findViewById(R.id.imageButton1); ibtnNext = (ImageButton)this.findViewById(R.id.imageButton2); ibtnProv.setOnClickListener(new ProvOnClickListener()); ibtnNext.setOnClickListener(new NextOnClickListener()); } private class ProvOnClickListener implements OnClickListener{ private int i =5; @Override public void onClick(View v) { if(i>0){ ivwPicture.setImageResource(Images[--i]); } else if(i==0){ i=5; ivwPicture.setImageResource(Images[4]); } } } private class NextOnClickListener implements OnClickListener{ private int i =0; @Override public void onClick(View v) { if(i<5){ ivwPicture.setImageResource(Images[i++]); } else if(i==5){ i=0; ivwPicture.setImageResource(Images[0]); } } } }
3.运行结果
本文适合有android基础的学习者 学习,所以其中没有加太多备注。因为工作很忙故写文章也写的初略。