spikey100

I have a relative layout built from XML.
I am capturing the onTouchEvent.
When I touch the screen anywhere except over the TableLayout or ImageButton
the MotionEvent.ACTION_DOWN and MotionEvent.ACTION_MOVE
events work fine.
Any suggestions as to how to make the onTouchEvent() work on the TableLayout
and ImageButton views?

The purpose of the exercise was to have a drag method working over the relative layout,
nothing I have read suggests it is possible unfortunately.
Maybe manipulating the layout_margin values?
I was contemplating a transparent canvas overlay but haven't figured that out yet.

Code snippets below

XML
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="left"
android:background="@drawable/yellowbackground">
<ImageButton
android:id="@+id/back_butt"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true"
android:layout_width="40dp"
android:layout_height="36dp"
android:adjustViewBounds="true"
android:scaleType="fitCenter"
android:clickable = "true"
androidnClick="additionClickHandler"
android:src="@drawable/back_button"
android:background="@null"
></ImageButton>
<ImageView
android:id="@+id/r2c2"
android:layout_centerInParent="true"
android:layout_width="55dp"
android:layout_height="55dp"
android:adjustViewBounds="true"
android:scaleType="fitCenter"
android:src="@drawable/four"
android:background="@null"
>
</ImageView>
.....more image views here
<TableLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_alignParentTop="true"
>
<TableRow>
<ImageView
android:id="@+id/imageB1"
android:maxWidth="47dp"
androidadding="1dp"
android:layout_width="wrap_content"
android:layout_height="47dp"
android:clickable = "true"
android:adjustViewBounds="true"
android:scaleType="fitCenter"
android:src="@drawable/one"
android:background="@drawable/buttonbg"
></ImageView>
<ImageButton
android:id="@+id/imageB2"
android:maxWidth="47dp"
..........
android:src="@drawable/two"
android:background="@drawable/buttonbg"
></ImageButton>
<ImageButton
android:id="@+id/imageB3"
android:maxWidth="47dp"
..............
android:src="@drawable/three"
android:background="@drawable/buttonbg"
></ImageButton>
</TableRow>
</TableLayout>

</RelativeLayout>

JAVA

@Override
public boolean onTouchEvent(MotionEvent ev) {
final int action = ev.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN: {
final float x = ev.getX();
final float y = ev.getY();

// Remember where we started
mLastTouchX = x;
mLastTouchY = y;
Log.d(TAG, "Coords: x=" + x + ",y=" + y);
break;
}

case MotionEvent.ACTION_MOVE: {
final float x = ev.getX();
final float y = ev.getY();
Log.d(TAG, "moved to: x=" + x + ",y=" + y);

Any help would be great.

Last edited by spikey100; November 24th, 2011 at 04:46 AM.

spikey100

Any help?

JamTheMan

It might have something to do with the way Android handles touch input. Simply put, some view can consume the event, without passing it on. This becomes a problem if you have different views on top of each other, that all need to register and handle the touch event.

First thing you should try is to explicitly handle all touches in all the views that get touches and simply implements their onTouch method to return false, which means that the view does not want to handle that specific touch event id, and that it should be passed on. Returning true, means that the view consumes the event - handles it and does not pass it on.

Try that, for a start...