Question

我在ImageView和textview中有一个Layout。我想为每个视图和完整的itemview添加一个onClickListner。我正在使用PagerAdapter。在instantiateItem方法中，我将其称为：

imageView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent i = new Intent(context, ProfileActivity.class);
                    i.putExtra(StaticVariables.INTENT_USERID, v.getId());


                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {


                        ActivityOptionsCompat options = ActivityOptionsCompat.
                                makeSceneTransitionAnimation(activity, imageView, imageView.getTransitionName());
                        ActivityCompat.startActivity(activity, i, options.toBundle());
                    } else {
                        activity.startActivity(i);
                        activity.overridePendingTransition(R.anim.gehnachlinks, R.anim.stay);
                    }
                }
            });

和textView：

textView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mLayout.setPanelState(SlidingUpPanelLayout.PanelState.EXPANDED);
                }
            });

现在我想在完整的itemView中添加一个OnLongClickListner。我尝试将OnLongClickListner实现为完整的适配器，并添加“itemView.setOnLongClickListener（this）;”但它没有奏效。我猜它不起作用，因为视图的ClickListeners“剪切”了整个项目的onlongclick。

Answer 1

尝试在xml

中的viewpager标记中添加android:descendFocusability="blocked"

Answer 2

您需要通过传递“视图”及其“位置”作为参数，为单击和长按事件创建一个简单的界面。

public static interface ClickListener{
    public void onClick(View view,int position);
    public void onLongClick(View view,int position);
}

让我们创建一个实现RecyclerView.OnItemTouchListener的内部类。我们还需要在此内部类中使用ClickListener接口。 GestureDetector类用于侦听各种触摸事件。

class RecyclerTouchListener implements RecyclerView.OnItemTouchListener{

    private ClickListener clicklistener;
    private GestureDetector gestureDetector;

    public RecyclerTouchListener(Context context, final RecyclerView recycleView, final ClickListener clicklistener){

        this.clicklistener=clicklistener;
        gestureDetector=new GestureDetector(context,new GestureDetector.SimpleOnGestureListener(){
            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                return true;
            }

            @Override
            public void onLongPress(MotionEvent e) {
                View child=recycleView.findChildViewUnder(e.getX(),e.getY());
                if(child!=null && clicklistener!=null){
                    clicklistener.onLongClick(child,recycleView.getChildAdapterPosition(child));
                }
            }
        });
    }

    @Override
    public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
        View child=rv.findChildViewUnder(e.getX(),e.getY());
        if(child!=null && clicklistener!=null && gestureDetector.onTouchEvent(e)){
            clicklistener.onClick(child,rv.getChildAdapterPosition(child));
        }

        return false;
    }

    @Override
    public void onTouchEvent(RecyclerView rv, MotionEvent e) {

    }

    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

    }
}

现在，我们将ItemTouchListener添加到RecyclerView中，我们将在其中传递RecyclerTouchListener类。这将实现onClick和onLongClick方法。这些方法将侦听视图特定位置的点击和长按事件。

recyclerView.addOnItemTouchListener(new RecyclerTouchListener(this,
        recyclerView, new ClickListener() {
    @Override
    public void onClick(View view, final int position) {
        //Values are passing to activity & to fragment as well
        Toast.makeText(MainActivity.this, "Single Click on position        :"+position,
                Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onLongClick(View view, int position) {
        Toast.makeText(MainActivity.this, "Long press on position :"+position,
                Toast.LENGTH_LONG).show();
    }
}));

为了访问RecyclerView中的特定视图组件。我们可以通过findViewById各自的视图来定义该组件。这是给您的代码。

recyclerView.addOnItemTouchListener(new RecyclerTouchListener(this,
        recyclerView, new ClickListener() {
    @Override
    public void onClick(View view, final int position) {
        //Values are passing to activity & to fragment as well
        Toast.makeText(MainActivity.this, "Single Click on position :"+position,
                Toast.LENGTH_SHORT).show();
        ImageView picture=(ImageView)view.findViewById(R.id.picture);
        picture.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "Single Click on Image :"+position,
                        Toast.LENGTH_SHORT).show();
            }
        });
    }

    @Override
    public void onLongClick(View view, int position) {
        Toast.makeText(MainActivity.this, "Long press on position :"+position,
                Toast.LENGTH_LONG).show();
    }
}));

用于其中视图的完整itemView和OnClickListeners的OnClickListener

2 个答案: