Question

我基本上想在每种情况下都启动新的Activity，但这是问题所在：我希望在“ if语句”为true时启动新的Activity。因此，当用户到达柜台的某个位置（假设2）时，预期的活动应开始。预先感谢！

以下是一些代码：

public class Adapter extends PagerAdapter {

    private List<Model>models;
    private LayoutInflater layoutInflater;
    private Context context;

    public Adapter(List<Model> models, Context context) {
        this.models = models;
        this.context = context;
    }

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

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

    @NonNull
    @Override
    public Object instantiateItem(@NonNull ViewGroup container, final int position) {
        layoutInflater=LayoutInflater.from(context);
        View view =layoutInflater.inflate(R.layout.item, container, false);

        ImageView imageView;
        TextView title, desc;

        imageView=view.findViewById(R.id.image);
        title=view.findViewById(R.id.title);
        desc=view.findViewById(R.id.desc);

        imageView.setImageResource(models.get(position).getImage());
        title.setText(models.get(position).getTitle());
        desc.setText(models.get(position).getDesc());


        view.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {
//HERE IS MY PROBLEM
                if(position == 0){
                    //start activity1
                } else if(position == 1){
                    //start activity2
                }else if(position == 2){
                    //start activity3
                }else if(position == 3){
                    //start activity4
                }else {
                    Toast.makeText(context, "Click the exit button", Toast.LENGTH_SHORT).show();
                }
            }
        });
        container.addView(view,0);
        return view;
    }

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

Answer 1

此代码运行良好：

view.setOnClickListener（new View.OnClickListener（）{

        @Override
        public void onClick(View view) {
            if(position == 0){
                Intent i = new Intent(view.getContext(),Levels.class);
                view.getContext().startActivity(i);
        }

如何在没有onCreate方法的情况下使用if语句启动新的Activity？

1 个答案: