单击按钮时没有任何动作

Question

我有customView 课程。此类是viewPager 视图之一。我想做与控制ViewPager 相关的所有逻辑将在一个地方：PagerAdapter，而不是在几个地方。我试过这样做，但是当我单击按钮时 - 没有任何动作。 自定义视图类：

public class CustomView extends LinearLayout {
    private LayoutInflater mInflater;
    private Button button;
    private OnClickListener clickListener;
 
    public CustomView(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        mInflater = LayoutInflater.from(context);
        View v = mInflater.inflate(R.layout.custom_view, this, true);
        button = v.findViewById(R.id.button);

        public void setClickListener(OnClickListener clickListener) {
        this.clickListener = clickListener;
        button.setOnClickListener(clickListener);
    }

适配器类：

public class CustomPagerAdapter extends PagerAdapter {
    private Context context;
    private View.OnClickListener clickListener;
    private CustomView customView;

    public CustomPagerAdapter(Context context) {
        this.context = context;
        customView = new CustomView(context);

      clickListener = new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Log.d("debug", "works");
            }
        };
    }

    public void setCustomView(CustomView customView) {
        this.customView = customView;
        customView.setClickListener(clickListener);
    }
.........

活动：

public class Activity extends AppCompatActivity {
    private ViewPager viewPager;
    private CustomPagerAdapter customPagerAdapter;
    private CustomView customView;

    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

       customView = new CustomView(this);
        customPagerAdapter = new CustomPagerAdapter(this);

        viewPager = findViewById(R.id.viewPager);
        viewPager.setAdapter(customPagerAdapter);
        customPagerAdapter.setCustomView(customView);

    }
}

Answer 1

将此方法从您的自定义视图构造函数中移出并在视图创建后调用它：

    public void setClickListener(OnClickListener clickListener) {
        this.clickListener = clickListener;
        button.setOnClickListener(clickListener);
    }