Android 实现图片点击切换

public class MainActivity extends AppCompatActivity {

    //定义一个访问图片的数组
    int[] images = new int[]{
            R.drawable.java,
            R.drawable.javaee,
            R.drawable.swift,
            R.drawable.ajax,
            R.drawable.html,
    };

    //用于图片切换
    int currenImg = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //获取Linearlayout布局容器
        LinearLayout main = (LinearLayout) findViewById(R.id.root);
        //创建ImageView组件
        final ImageView image = new ImageView(this);
        //将ImageView组建添加到linearlayout布局中
        main.addView(image);
        //初始化显示第一张图片
        image.setImageResource(images[0]);
        image.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                image.setImageResource(images[++currenImg % images.length]);
            }
        });
    }

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/root"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

</LinearLayout>