第二周总结

由于web不符合当前课程所需要的方向，所以将web项目的编程改为Android项目的开发，从界面设计和界面的跳转开始学习设计。

本周计划Android的学习开发路线，分配成员任务。

package com.example.test04;
import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher;

public class MainActivity extends AppCompatActivity implements View.OnClickListener, ViewSwitcher.ViewFactory
{

    private ImageSwitcher is_1;
    private Button btn_next;
    private Button btn_previous;
    private int image[]={R.drawable.a1,R.drawable.a2,R.drawable.a3,R.drawable.a4};
    private int imageIndex = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState)
{
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        is_1 =
findViewById(R.id.is_1);
        btn_next =
findViewById(R.id.btn_next);
        btn_previous =
findViewById(R.id.btn_prebious);
        init();
        btn_previous.setOnClickListener(this);
        btn_next.setOnClickListener(this);

    }
    @Override
    public View makeView(){
        ImageView imageView = new ImageView(this);
        return imageView;
    }

    private void init(){
        is_1.setFactory(this);
        is_1.setImageResource(image[imageIndex]);
    }

    @Override
    public void onClick(View v) {
        if (v.getId() ==
R.id.btn_next){
            imageIndex++;
            if (imageIndex>3){
                imageIndex=0;
            };
            is_1.setInAnimation(this,R.anim.leftin);
            is_1.setOutAnimation(this,R.anim.rightout);
        }else if (v.getId() ==
R.id.btn_prebious){
            imageIndex–;
            if (imageIndex<0){
                imageIndex=image.length-1;
            };
            is_1.setInAnimation(this,R.anim.rightin);
            is_1.setOutAnimation(this,R.anim.leftout);
        }
        is_1.setImageResource(image[imageIndex]);
    }
}