android中ImageView讲解

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。