Android引导页实现

我们在第一次使用一个app的时候或多或少都会有引导页的存在，在这个帖子中我已经整理好了相关的类容

下面是部分截图

先创建一个空的activity叫StartActivity里面的代码为

public class StartActivity extends AppCompatActivity {

    private ViewPager startViewpager;
    public List introductionList;
    private IntroductionAdapter introductionAdapter;
    private Button cButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_start);

        initView();
        initAdapter();
        initClick();
    }

    
    private void initView() {
        startViewpager = findViewById(R.id.start_viewpager);
        introductionList = new ArrayList<>();
        introductionList.add(getView(R.layout.introduction_a));
        introductionList.add(getView(R.layout.introduction_b));
        introductionList.add(getView(R.layout.introduction_c));

    }

    
    private void initAdapter() {
        introductionAdapter = new IntroductionAdapter(introductionList);
        startViewpager.setAdapter(introductionAdapter);
    }

    
    private View getView(int resId) {
        View view = LayoutInflater.from(this).inflate(resId, null);
        return view;
    }

    
    private void initClick() {
       cButton=introductionList.get(2).findViewById(R.id.c_button);
       cButton.setOnClickListener(new View.OnClickListener() {
           @Override
           public void onClick(View v) {
               Toast.makeText(StartActivity.this, "测试点击", Toast.LENGTH_SHORT).show();
           }
       });
    }
}

创建适配器 IntroductionAdapter 并且继承PagerAdapter

public class IntroductionAdapter extends PagerAdapter {

    private ListpageList;

    
    public IntroductionAdapter(Listlist){
        this.pageList=list;
    }

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

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

    
    @NonNull
    @Override
    public Object instantiateItem(@NonNull ViewGroup container, int position) {
        View view=pageList.get(position);
        container.addView(view);
        return view;
    }

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

    }

}

在androidmainfest文件中修改首页启动

在activity_start.xml中添加布局

创建三个引导页 introduction_a

introduction_b

introduction_c

编译安装即可

工程目录截图

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