Is it possible to add scrollable TextView to ListView?

Question

I have a ListView where each row has a fixed height.
Each row contains next to some TextView images.
Sometimes the text I want to display is too large, and so I would like to make it scrollable.
So I added (based on Scrolling TextView on Android ) the following lines to my TextView

text.setMaxLines(5); text.setVerticalScrollBarEnabled(true); text.setMovementMethod(ScrollingMovementMethod.getInstance()); 

This works fine if I use TextView separately, but not when I put a TextView in a ListView:
as soon as I do a vertical scroll, the events seem to be consumed by the ListView.

Any suggestions on how I can make this work?

Below is the full (test) activity (no layout.xml)

 public class TestScrollableTextView extends Activity { protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); LinearLayout layout = new LinearLayout(this); //add a ListView ListView list = new ListView(this); layout.addView(list); list.setAdapter(new BaseAdapter() { @Override public View getView(int position, View convertView, ViewGroup parent) { TextView text = new TextView(TestScrollableTextView.this); String s = ""; //add 10 lines of text, all but first are indented for (int i = 0; i < 10; i++) { if(i>0) s+="\t"; s += "position "+position+"; line="+i+"\n"; } text.setText(s); text.setMaxLines(5); text.setVerticalScrollBarEnabled(true); text.setMovementMethod(ScrollingMovementMethod.getInstance()); return text; } @Override public long getItemId(int position) { return 0; } @Override public Object getItem(int position) { return null; } @Override public int getCount() { return 20; } }); setContentView(layout); } } 

Answer 1

It is best to probably create your own MyTextView as follows and call requestDisallowInterceptTouchEvent. By doing so, you indicate to the list that "events should not be intercepted."

 class MyTextView extends TextView { public MyTextView(Context context) { super(context); // TODO Auto-generated constructor stub } @Override public boolean dispatchTouchEvent(MotionEvent event) { boolean ret; ret = super.dispatchTouchEvent(event); if(ret) { list.requestDisallowInterceptTouchEvent(true); } return ret; } } 

Answer 2

getLineCount and getLineHieght and check if the text is longer than a TextView.

if you use this code, the listView can be scrolled by touching anywhere other than the TextView using (boolean) isLarger = true.

 text.setText(s); text.setMaxLines(100); text.setVerticalScrollBarEnabled(true); text.setMovementMethod(new ScrollingMovementMethod()); OnTouchListener listener = new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { boolean isLarger; isLarger = ((TextView) v).getLineCount() * ((TextView) v).getLineHeight() > v.getHeight(); if (event.getAction() == MotionEvent.ACTION_MOVE && isLarger) { v.getParent().requestDisallowInterceptTouchEvent(true); } else { v.getParent().requestDisallowInterceptTouchEvent(false); } return false; } }; text.setOnTouchListener(listener); 

Answer 3

I can do this work by subclassing the ListView and overriding onTouchEvent as follows:
- I first check if the MotionEvent is inside the childView
- if so, I call child onTouchEvent

This is really pretty basic functionality, so I am surprised that the ListView itself is not being processed. Did I miss something?

  @Override public boolean onTouchEvent(MotionEvent event) { //find correct child View theChild = null; boolean handled = false; for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); Rect rect = new Rect(); child.getDrawingRect(rect); offsetDescendantRectToMyCoords(child, rect); if(rect.contains((int)event.getX(), (int)event.getY())) { theChild = child; } } if(theChild!=null) { handled = theChild.onTouchEvent(event); } if(!handled) handled = super.onTouchEvent(event); return handled; } 

Answer 4

Use this custom option to solve your problem.

 public class ScrollableListView extends ListView { public ScrollableListView(Context context) { super(context); } public ScrollableListView(Context context, AttributeSet attrs) { super(context, attrs); } public ScrollableListView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } @Override public boolean onInterceptTouchEvent(MotionEvent ev) { final int action = ev.getAction(); switch (action) { case MotionEvent.ACTION_DOWN: Log.i("VerticalScrollview", "onInterceptTouchEvent: DOWN super false"); super.onTouchEvent(ev); break; case MotionEvent.ACTION_MOVE: return false; // redirect MotionEvents to ourself case MotionEvent.ACTION_CANCEL: Log.i("VerticalScrollview", "onInterceptTouchEvent: CANCEL super false"); super.onTouchEvent(ev); break; case MotionEvent.ACTION_UP: Log.i("VerticalScrollview", "onInterceptTouchEvent: UP super false"); return false; default: Log.i("VerticalScrollview", "onInterceptTouchEvent: " + action); break; } return false; } @Override public boolean onTouchEvent(MotionEvent ev) { super.onTouchEvent(ev); Log.i("VerticalScrollview", "onTouchEvent. action: " + ev.getAction()); return true; } }