rollPagerView引导页轮播图_轮播图引导页-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_40567164/article/details/83965363

本文介绍了一种使用Java实现的自定义视图适配器，该适配器能够根据传入的数据列表动态更新视图，并在列表末尾显示一个按钮，用于触发跳转到另一个Activity并更新SharedPreferences。

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适配器：

public class MyViewAdapter extends StaticPagerAdapter {
private SharedPreferences sharedPreferences;
private Context context;
private ArrayList<Integer> list;
private Button bt;
public MyViewAdapter(MainActivity mainActivity, ArrayList<Integer> list, Button bt, SharedPreferences sp) {
this.context=mainActivity;
this.list=list;
this.bt=bt;
this.sharedPreferences=sp;
}

@Override
public View getView(final ViewGroup container, int position) {
View view= LayoutInflater.from(context).inflate(R.layout.a,null);
ImageView imageView= (ImageView) view.findViewById(R.id.img);
imageView.setImageResource(list.get(position));
if(position==list.size()-1){

bt.setVisibility(View.VISIBLE);

}
else {
bt.setVisibility(View.GONE);
}
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent=new Intent(context,Main2Activity.class);
context.startActivity(intent);
SharedPreferences.Editor editor=sharedPreferences.edit();
editor.putInt("count",1);
editor.commit();
}
});
return view;
}

@Override
public int getCount() {
return list.size();

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Activity：

package jiyun.com.myapplication;

import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.Button;
import android.widget.ListView;

import com.jude.rollviewpager.RollPagerView;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

private ListView lv;
private RollPagerView rollPagerView;
private ArrayList<Integer> list = new ArrayList<>();
int[] arr = {R.mipmap.ic_launcher, R.mipmap.ic_launcher, R.mipmap.ic_launcher};
private Button bt;
public SharedPreferences sp;
public int count;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();

initListener();

}

private void initListener() {
count=sp.getInt("count",0);
if(count>0){
startActivity(new Intent(MainActivity.this,Main2Activity.class));
}
else {
initData();
initAdapter();
}
}

private void initData() {
for (int i = 0; i < arr.length; i++) {
list.add(arr[i]);
}
}

private void initAdapter() {
MyViewAdapter my = new MyViewAdapter(this, list,bt,sp);
rollPagerView.setAdapter(my);
}

private void initView() {

rollPagerView = (RollPagerView) findViewById(R.id.rollPagerView);

bt = (Button) findViewById(R.id.bt);
sp=getSharedPreferences("con",MODE_PRIVATE);
}

}