突击训练一

在第一天冲刺中，对android进行了关于页面的布局的一些学习还有关于android的关于页面切换的内容，制作了一个简单的小相册

 

 

 

MainActivity.java

package com.example.lib;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private ImageView mImage;
    private TextView mText;
    private String[] title;
    private int[] images;
    private int num;
    private int index;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        initDate();
    }

    private void initDate() {
        title = new String[]{"第一张","第二张","第三章"};
        images = new int[]{R.drawable.girl,R.drawable.articlebg,R.drawable.banner_top};
        mImage.setImageResource(images[0]);
        mText.setText(title[0]);
        num = title.length;
        index = 0;

    }

    private void initView() {
        mImage=findViewById(R.id.iv_show);
        mText=findViewById(R.id.tv_show);
        findViewById(R.id.btn_previous).setOnClickListener(this);
        findViewById(R.id.btn_next).setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.btn_previous:
                if(index==0){
                    index=title.length-1;
                }
                else
                {
                    index--;
                }
                break;
            case R.id.btn_next:if(index==title.length-1){
                index=0;
            }
            else{
                index++;
            }
            break;
        }
        updateview();

    }

    private void updateview() {
        mImage.setImageResource(images[index]);
        mText.setText(title[index]);
    }
}

 

activity_main.xml

package com.example.lib;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private ImageView mImage;
    private TextView mText;
    private String[] title;
    private int[] images;
    private int num;
    private int index;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        initDate();
    }

    private void initDate() {
        title = new String[]{"第一张","第二张","第三章"};
        images = new int[]{R.drawable.girl,R.drawable.articlebg,R.drawable.banner_top};
        mImage.setImageResource(images[0]);
        mText.setText(title[0]);
        num = title.length;
        index = 0;

    }

    private void initView() {
        mImage=findViewById(R.id.iv_show);
        mText=findViewById(R.id.tv_show);
        findViewById(R.id.btn_previous).setOnClickListener(this);
        findViewById(R.id.btn_next).setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.btn_previous:
                if(index==0){
                    index=title.length-1;
                }
                else
                {
                    index--;
                }
                break;
            case R.id.btn_next:if(index==title.length-1){
                index=0;
            }
            else{
                index++;
            }
            break;
        }
        updateview();

    }

    private void updateview() {
        mImage.setImageResource(images[index]);
        mText.setText(title[index]);
    }
}