Develop Reference

Is there any way to make Linearlayout having children not clickable android?

I have a linearyLayout having several linearlayout and some views.
I want to make the whole layout not clickable.
this is the the first part of the linearlayout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/selector_timetable_row"
android:orientation="vertical">
I first did inflating
View view = layoutInflater.inflate(~~, above layout);
And I did
view.setClickable(false);
but it is still clickable
listener to the layout still fires when i touch the layout.

You can disable touch event propagation with custom view like below:
public class CustomLinearLayout extends LinearLayout {
public CustomLinearLayout(Context context) {
super(context);
}
public CustomLinearLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomLinearLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
public boolean dispatchTouchEvent(MotionEvent ev) {
return false;
}
}
Use like this:
<{Here is package name}.CustomLinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/selector_timetable_row"
android:orientation="vertical">

Animate adding child views from addView() method

I'm trying to animate adding child views to a LinearLayout. Just wanted to know if there is a better way to go about this or if this approach have any drawbacks.
And if this post helped don't forget to up vote :)
Here is what I did:
public class CardLayout extends LinearLayout {
public CardLayout(Context context) {
super(context);
initLayoutObserver();
}
public CardLayout(Context context, AttributeSet attrs) {
super(context, attrs);
initLayoutObserver();
}
#Override
public void addView(View child) {
super.addView(child);
Animation animation = AnimationUtils.loadAnimation(getContext(), R.anim.slide_up_in);
animation.setStartOffset(getChildCount() * 100 + getResources().getInteger(R.integer.screen_transition_time_fade_in));
child.startAnimation(animation);
}
}

Customized Scrollable EditText in Scrollview Makes the Scrollview Jumps

I want to have a EditText in a scrollview and this EditText needs to be scrollable. So I made a customized one as follow:
public class myEditText extends EditText {
public myEditText(Context context) {
super(context);
}
public myEditText(Context context, AttributeSet attrs) {
super(context, attrs);
}
public myEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
this.getParent().requestDisallowInterceptTouchEvent(true);
return super.onTouchEvent(ev);
}
}
This EditText has only one problem, that is when the text gets really long, the Scrollview containing it jumps for some reason. This makes me unable to edit text after a certain length. Is anyone know why that happens?

I think I solved it.
The issue was when there is a cursor in the EditText, the bringPointIntoView(int offset) method will make EditText scroll to the position where the cursor is at, so that the cursor will be in your sight and you can edit the text. Usually that's how it works, but when the EditText is in a ScrollView, instead of scroll the EditText, it makes the ScrollView scrolls as well. That's the reason I saw the ScrollView jumps.
The solution is simply override the bringPointIntoView method.
So if anyone wants to use a scrollable EditText in a ScrollView, I think this may help:
public class myEditText extends EditText {
public myEditText(Context context) {
super(context);
}
public myEditText(Context context, AttributeSet attrs) {
super(context, attrs);
}
public myEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
this.getParent().requestDisallowInterceptTouchEvent(true);
return super.onTouchEvent(ev);
}
#Override
public boolean bringPointIntoView(int offset) {
return false;
}
}

Click listener for drawable inside custome framelaout class android

hi I am developing android application in which i am using one custom frame layout class. Inside that class I am using one drawable and with the help of canvas i m drawing that. I did this in following way :
public class BackgroundContainer extends FrameLayout implements OnTouchListener{
Drawable mShadowedBackground;
public BackgroundContainer(Context context) {
super(context);
init();
}
public BackgroundContainer(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public BackgroundContainer(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
private void init() {
mShadowedBackground =
getContext().getResources().getDrawable(R.drawable.actionbar);
}
#Override
public boolean onTouchEvent(MotionEvent event)
{
Log.i("OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO", "OOOOOOOOOOOOOOOOOOOOOO");
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN: {
invalidate();
}
}
return true;
}
#Override
protected void onDraw(Canvas canvas) {
mShadowedBackground.setBounds(getWidth()-150, 0, getWidth(), mOpenAreaHeight);
canvas.save();
canvas.translate(0, mOpenAreaTop);
mShadowedBackground.draw(canvas);
canvas.restore();
}
}
}
Now I am want to listen click even on my drawable. I implement ontouch event but its not working. Am i doing it in wrong way. Need help thank you.

Drawables are not clickable as it is not considered as a view.

Like deepak already said: by implementing the corresponding listener you just provide the behavior what should happen for a specific event. You still need to add the listener :) In your case this would help (in your init()):
setOnTouchListener(this);

Android TimePicker (Wheel Style) not responding correctly to flick gestures inside ScrollView

I have a dialog box that contains a Scrollview, which contains a layout with two TimePickers.
The timepickers are the newer style ones, what's in ICS.
The problem is that they seem to fight for focus when you change the time by dragging the wheel, or flicking it. It will change the time just a little, and then the layout will scroll instead.
Any ideas?
Thanks in advance.

I had the same problem when using the Holo theme, and here is where I found the solution: https://groups.google.com/forum/?fromgroups#!topic/android-developers/FkSfJI6dH8w
You must implement your custom DatePicker or TimePicker and override the following method:
#Override
public boolean onInterceptTouchEvent(MotionEvent ev)
{
if (ev.getActionMasked() == MotionEvent.ACTION_DOWN)
{
ViewParent p = getParent();
if (p != null)
p.requestDisallowInterceptTouchEvent(true);
}
return false;
}

Because the link from Klemens Zleptnig is broken, here is a complete example. This fix helps with the scroll of a TabLayout too btw. I excluded the area around the big numbers in the top of the TimePicker because they don't need the scroll event anyway.
xml:
<com.name.app.MyTimePicker
android:id="#+id/timePicker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
.../>
java:
public class MyTimePicker extends TimePicker {
public MyTimePicker(Context context) {
super(context);
}
//This is the important constructor
public MyTimePicker(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyTimePicker(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public MyTimePicker(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
#Override
public boolean onInterceptTouchEvent(MotionEvent ev)
{
if (ev.getActionMasked() == MotionEvent.ACTION_DOWN) {
//Excluding the top of the view
if(ev.getY() < getHeight()/3.3F)
return false;
ViewParent p = getParent();
if (p != null)
p.requestDisallowInterceptTouchEvent(true);
}
return false;
}
}