I'm trying to create a vertical textview with the following code
public class VerticalTextView extends TextView{
public VerticalTextView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
public VerticalTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public VerticalTextView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
#Override
protected void onDraw(Canvas canvas) {
Log.i("VerticalTextView", "onDraw Called");
canvas.save();
canvas.rotate(-90, getWidth() / 2, getHeight() / 2);
super.onDraw(canvas);
canvas.restore();
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// TODO Auto-generated method stub
super.onMeasure(heightMeasureSpec, widthMeasureSpec);
super.setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth());
}
}
however I'm finding that it is not redefining the full width in the new height. and therefore the texts is really truncated.
Any ideas?
m
In this similar question (look at kostmo answer not the accepted one), he uses two custom methods to compute the size of the View (measureHeight and measureWidth).
So super.setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth()); looks wrong according to his answer.
It seems you can as well copy/paste his answer, I think it is what you are trying to achieve.
Related
I'm trying to make the following effect:
I have a custom ScrollView (in oder to get the onScrollChanged listener) and a custom View inside it. In the custom View I succeed to place the item as I want.
Here my customView:
public class CustomView extends FrameLayout {
private TextView nameView;
private TextView emailView;
private ImageView addressView;
private Tracks track ;
private double scrollProgress = 0.0;
private double topViewScaleFactor = 2.0;
private double collapsedViewHeight = 200.0;
private double expandedViewHeight = 700.0;
private double scrollProgressPerView = expandedViewHeight;
View v;
View firstItem;
View secondView;
int itemMinHeight = 200;
int itemMaxHeight = 700;
public CustomView(MyScrollView paramEventListView, Context paramContext){
super(paramContext);
}
public CustomView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
public CustomView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public CustomView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
#Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
// TODO Auto-generated method stub
int m = getMeasuredWidth();
int itemWidth = (r-l)/getChildCount();
// int itemHeight = (b-t)/getChildCount();
firstItem = getChildAt(0);
//firstItem.layout(0, 0, r-l, itemMaxHeight);
firstItem.measure(View.MeasureSpec.makeMeasureSpec(m, MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(itemMaxHeight, MeasureSpec.EXACTLY));
firstItem.layout(0, 0, r-l, itemMaxHeight);
secondView = getChildAt(1);
secondView.measure(View.MeasureSpec.makeMeasureSpec(m, MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(itemMinHeight, MeasureSpec.EXACTLY));
secondView.layout(0, itemMaxHeight, r-l, itemMinHeight+itemMaxHeight);
int FirstAndSEcondItemHeight = firstItem.getHeight() + secondView.getHeight();
for(int i=2; i< this.getChildCount(); i++){
v = getChildAt(i);
// v.layout(itemWidth*i, 0, (i+1)*itemWidth, b-t);
v.layout(0, FirstAndSEcondItemHeight + (itemMinHeight*(i-2)), r-l, FirstAndSEcondItemHeight + ((i-1)*itemMinHeight));
}
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// TODO Auto-generated method stub
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int heightMeasured = 0;
/*for each child get height and
heightMeasured += childHeight;*/
for(int i=0; i< this.getChildCount(); i++){
heightMeasured += getChildAt(i).getHeight();
}
//If I am in a scrollview i got heightmeasurespec == 0, so
if(heightMeasureSpec == 0){
heightMeasureSpec = MeasureSpec.makeMeasureSpec(heightMeasured, MeasureSpec.EXACTLY);
}
setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec), getDefaultSize(this.getSuggestedMinimumHeight(), heightMeasureSpec));
}
Here my Custom ScrollView:
public class MyScrollView extends ScrollView{
public MyScrollView(Context context) {
super(context);
}
public MyScrollView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
add(context);
}
public MyScrollView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public void setScrollViewListener(ScrollViewListener scrollViewListener) {
this.scrollViewListener = scrollViewListener;
}
#Override
protected void onScrollChanged(int x, int y, int oldx, int oldy) {
super.onScrollChanged(x, y, oldx, oldy);
// How can I acces to each child in the customView class, and change their height depending on the scrollChanged
}
But now I need to change the item height when I scroll the scrollview. I don't know what to put in the onScrollChanged...
If someone has an idea?
Thanks
Perhaps you want to force the view to redraw by calling invalidate()?
From comment: I think you need to move your code in the onMeasure method to replace the "TODO" stub, so that super.onMeasure() is called after your manipulations. And make sure you're passing the new width/height calculations to it.
I have a class MyLayout extending RelativeLayout which includes View type field. MyLayout object is created in xml layout file, so all properties are set there. I need to programatically set size of View field which depends on size of it's parent (MyLayout).
I was trying to set it in constructor, but when I try to use getWidth() method, it returns 0, so I assume that the size is not yet set inside a constructor. I was also trying to set it in onDraw() method, but when I run an application, this internal View is displayed for like second with it's default size and after that time it's scaled to the right size. Then I tried putting it inside onMeasure() method, but this one is called a few times, so again it doesn't seem to be efficient at all.
So what could be the best place to set it?
This is my class:
public class MyLayout extends RelativeLayout {
private View pointer;
public MyLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context);
}
public MyLayout(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public MyLayout(Context context) {
super(context);
init(context);
}
private void init(Context c) {
pointer = new View(c);
pointer.setBackgroundResource(R.drawable.pointer);
addView(pointer);
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams)pointer.getLayoutParams();
lp.height = (int)(getHeight() * 0.198);
lp.width = (int)(getWidth() * 0.198);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
in your MyLayout class, override onSizeChanged():
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams)pointer.getLayoutParams();
lp.height = (int)(getHeight() * 0.198);
lp.width = (int)(getWidth() * 0.198);
};
this is my custom numberpicker
public class CustomNumberPicker extends NumberPicker {
public CustomNumberPicker(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
public CustomNumberPicker(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
public CustomNumberPicker(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
#Override
public boolean onInterceptTouchEvent(MotionEvent ev)
{
if (ev.getActionMasked() == MotionEvent.ACTION_DOWN)
{
ViewParent p = getParent();
if (p != null)
p.requestDisallowInterceptTouchEvent(true);
}
return false;
}
}
Because this numberpicker is in a scrollview, and it's hard to roll the number,
so i override onInterceptTouchEvent(). This customized method works well on TimePicker.
But after customing, the numberpicker can not roll,but the uparrow and downarrow works well.
Is there anyone who has solution to this problem? Thanks!!!!!!
I would like to get color of EditText, I could set it by setBackgroundColor, but there is not getBackgroundColor function
I found this
EditText edtxt;
edtxt.setBackgroundColor(Color.GREEN);
PaintDrawable drawable;
Log.d(TAG,"1");
drawable = (PaintDrawable)edtxt.getBackground();
if(drawable.getPaint().getColor()==(int)Color.GREEN).........
Log.d(TAG,"2");
but its not working and crashing
05-29 19:20:27.526: E/AndroidRuntime(20255): Caused by: java.lang.ClassCastException: android.graphics.drawable.StateListDrawable cannot be cast to android.graphics.drawable.PaintDrawable
This should work for API level 11 and up
ColorDrawable drawable = (ColorDrawable)edtxt.getBackground();
if(drawable.getColor()==(int)Color.GREEN)
System.out.println("It's Green");
If you want it to wok on earlier APIs, I would suggest using a Custom EditText and overriding the setBackgroundColor(int color) method.
public class NewEditText extends EditText {
private int color;
public NewEditText(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
public NewEditText(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
public NewEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
#Override
public void setBackgroundColor(int color) {
// TODO Auto-generated method stub
this.color=color;
super.setBackgroundColor(color);
}
public int getBackgroundColor() {
return color;
}
}
Now in the Layout use:
<com.aneesh.mypackage.NewEditText
android:layout_width="fill_parent"
android:id="#+id/customview"
android:layout_height="wrap_content"/>
and your Activity Code will change to
NewEditText custView = (NewEditText)findViewById(R.id.customview);
custView.setBackgroundColor(Color.GREEN);
if(custView.getBackgroundColor()==(int)Color.GREEN)
System.out.println("It's green");
If you are setting the color in runtime it could be better to save some kind of flag (boolean for example) to know which is the background color of the edit text.
While creating a custom Viewgroup,is it possible to have multiple Imagebutton within it?
is it possible to place Image buttons in our own position.
If all these are possible,how to call the click listener which extending this viewgroup?
My ViewGroup have to look like this image
EDIT 1:
public class CustomViewGroup extends ViewGroup{
public CustomViewGroup(Context context) {
super(context);
setWillNotDraw(false);
//addImageView();
// TODO Auto-generated constructor stub
}
public CustomViewGroup(Context context, AttributeSet attrs) {
super(context, attrs);
setWillNotDraw(false);
//addImageView();
// TODO Auto-generated constructor stub
}
public CustomViewGroup(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs,
defStyle);
setWillNotDraw(false);
//addImageView();
// TODO Auto-generated constructor stub
}
#Override
protected void onLayout(boolean arg0, int arg1, int arg2, int arg3, int arg4) {
// TODO Auto-generated method stub
System.out.println("onLayout");
}
#Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
drawBackground(canvas);
addImageView();
//super.onDraw(canvas);
}
private void drawBackground(Canvas canvas)
{
Bitmap background =BitmapFactory.decodeResource(getContext().getResources(), R.drawable.shape_quarter_circle);
canvas.drawBitmap(background, 0,0, null);
}
private void addImageView()
{
ImageView imageOne = new ImageView(getContext());
imageOne.setImageDrawable(getContext().getResources().getDrawable(R.drawable.round_icon));
//imageOne.setWillNotDraw(false);
addView(imageOne);
requestLayout();
}
I am trying to draw a background and place some ImageView on the top of the background.
In this code Background image is getting displayed correctly. but i could not see the ImageView drawn upon it.
Am i going in the correct path?
all the things you said are possible.
you just use
yourViewGroup.setOnClickListener()
for your view group click listener.