UI高级_引导页

xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
4000
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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>

<Button
android:id="@+id/jin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="点击进入"
android:layout_centerInParent="true"/>

</RelativeLayout>

MainAcitivty基类：https://blog.csdn.net/qq_43797842/article/details/86233215
MainAcitivty

import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;

import com.home.homework1.base.BaseActivity;

import java.util.ArrayList;
/**
* @Auther: 努力
* @Date: 2019/1/19 11:37:${卢文杰}
* @Description:
*/
public class MainActivity extends BaseActivity {

private ViewPager viewPager;
private Button tiaozhuan;
//数据 引导页的图片
private ArrayList<ImageView> img = new ArrayList<>();

@Override
protected int bindLayout() {
return R.layout.activity_main;
}

@Override
protected void initView() {
//找控件
viewPager = bindView(R.id.viewPager);
//按钮
tiaozhuan = bindView(R.id.jin);
}

@Override
protected void initData() {
//隐藏按钮
tiaozhuan.setVisibility(View.GONE);

//创建数组  把图片放进数组
int arr[] = {
R.drawable.m1,
R.drawable.m2,
R.drawable.m3,
R.drawable.m4
};
for (int i = 0;i<arr.length;i++){
ImageView imageView = new ImageView(MainActivity.this);
imageView.setImageResource(arr[i]);
img.add(imageView);

}
//适配器
viewPager.setAdapter(new PagerAdapter() {
@Override
public int getCount() {
return img.size();
}

@Override
public boolean isViewFromObject(@NonNull View view, @NonNull Object o) {
return view == o;
}

@NonNull
@Override
public Object instantiateItem(@NonNull ViewGroup container, int position) {
ImageView imageView = img.get(position);
container.addView(imageView);
return imageView;
}

@Override
public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
container.removeView((View) object);
}
});

}

@Override
protected void bindEvent() {
//页面滑动事件
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int i, float v, int i1) {

}

@Override
public void onPageSelected(int i) {
if (i==img.size()-1) {
tiaozhuan.setVisibility(View.VISIBLE);
} else {
tiaozhuan.setVisibility(View.GONE);
}
}

@Override
public void onPageScrollStateChanged(int i) {

}
});
//点击跳转事件
tiaozhuan.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,ShowActivity.class);
startActivity(intent);
//完成页面 返回桌面
finish();
}
});
}
}