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  • 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。

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  • 原文地址:https://www.cnblogs.com/jianrong-zheng/p/3237497.html
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