I have 2 views - a container view, and a gauge view. I want to programmatically change the height of the gauge view. The problem is that when I get the height of the container view - it always comes back as 2.0 - even though the height is full-screen!
int fullHeight = containerView.getLayoutParams().height;
Number height = fullHeight * (thisTank.getTankTotalVolume().doubleValue()/thisTank.getTankMaxVolume().doubleValue());
Number width = gaugeView.getWidth();
//gaugeView.setLayoutParams(new LinearLayout.LayoutParams(width.intValue(), height.intValue()));
gaugeView.getLayoutParams().height = height.intValue() * fullHeight;
gaugeView.requestLayout();
Actually, if you set the view's height to WRAP_CONTENT or MATCH_PARENT in XML, the containerView.getLayoutParams().height should be equals to 2, its a default value...!
You have to two options,
First, you can defined a fix value in the XML file
Second, and recommended, you can use a tree observer for this purpose. Please see the below code...!
final View layout = (View)findViewById(R.id.YOUR_VIEW_ID);
ViewTreeObserver vto = layout.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
this.layout.getViewTreeObserver().removeGlobalOnLayoutListener(this);
int width = layout.getMeasuredWidth();
int height = layout.getMeasuredHeight();
}
});
I have designed an layout in which LinearLayout has 2 children LinearLayout and FrameLayout and in each child I put different views.
I just wanted to measure height and width of FrameLayout so that I could serve my purpose.
In program I am using
int height,width;
FrameLayout fr=(FrameLayout)findviewbyid(R.id.fr);
height=fr.getHeight();
width=fr.getWidth();
returns value as 0 for both
Even I tried with following code
int height,width;
FrameLayout fr=(FrameLayout)findviewbyid(R.id.fr);
height=fr.getMeasuredHeight();
width=fr.getMeasuredWidth();
returns same value 0
and finally I tried with following code,
int height,width;
FrameLayout fr=(FrameLayout)findviewbyid(R.id.fr);
height=fr.getgetLayoutParams().height();
width=fr.getLayoutParams().width;
returns me -2 and -1
I want the solution to get height and width of any layout programmatically?
The view itself, has it's own life cycle which is basically as follows:
Attached
Measured
Layout
Draw
So, depending on when are you trying to get the width/height you might not see what you expect to see, for example, if you are doing it during onCreate, the view might not even been measured by that time, on the other hand if you do so during onClick method of a button, chances are that by far that view has been attached, measured, layout, and drawn, so, you will see the expected value, you should implement a ViewTreeObserver to make sure you are getting the values at the proper moment.
LinearLayout layout = (LinearLayout)findViewById(R.id.YOUR VIEW ID);
ViewTreeObserver vto = layout.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
this.layout.getViewTreeObserver().removeGlobalOnLayoutListener(this);
} else {
this.layout.getViewTreeObserver().removeOnGlobalLayoutListener(this);
}
int width = layout.getMeasuredWidth();
int height = layout.getMeasuredHeight();
}
});
As CapDroid say, you are trying to get the size before the view drawn, another possible solution could be to do a Post with a runnable on the View:
mView.post(new Runnable() {
#Override
public void run() {
int width = mView.getWidth();
int height = mView.getHeight();
}
}
Just wanted to add an answer here, since Koltin has some convenience methods to do this, which are a lot less ugly than adding and removing a onGlobalLayoutListener:
view.doOnLayout {
it.measuredWidth
it.measuredHeight
}
You can see more of the convinience methods here.
I think you are getting Height and Width in OnCreate() method that's why you getting always 0 values because at that time your view still not created.
Try to get height and width on some button click or else..
just give your height and You will get height or even width if wanted.
/**
* Get the view height before the view will render
* #param view the view to measure
* #return the height of the view
*/
public static int getViewHeight(View view) {
WindowManager wm =
(WindowManager) view.getContext().getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
int deviceWidth;
if(android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2){
Point size = new Point();
display.getSize(size);
deviceWidth = size.x;
} else {
deviceWidth = display.getWidth();
}
int widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(deviceWidth, View.MeasureSpec.AT_MOST);
int heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
view.measure(widthMeasureSpec, heightMeasureSpec);
return view.getMeasuredHeight(); // view.getMeasuredWidth();
}
In Kotlin you can simply do this:
fr.post {
height=fr.height
width=fr.width
}
If you get -1 or -2 it could also be the numeric value of LayoutParams.WRAP_CONTENT (-2) or LayoutParams.MATCH_PARENT (-1).
I had same issue but didn't want to draw on screen before measuring so I used this method of measuring the view before trying to get the height and width.
Example of use:
layoutView(view);
int height = view.getHeight();
//...
void layoutView(View view) {
view.setDrawingCacheEnabled(true);
int wrapContentSpec =
MeasureSpec.makeMeasureSpec(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
view.measure(wrapContentSpec, wrapContentSpec);
view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
}
Most easiest way is to use ViewTreeObserver, if you directly use .height or .width you get values as 0, due to views are not have size until they draw on our screen. Following example will show how to use ViewTreeObserver
ViewTreeObserver viewTreeObserver = YOUR_VIEW_TO_MEASURE.getViewTreeObserver();
if (viewTreeObserver.isAlive()) {
viewTreeObserver.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
YOUR_VIEW_TO_MEASURE.getViewTreeObserver().removeOnGlobalLayoutListener(this);
int viewHeight = YOUR_VIEW_TO_MEASURE.getHeight();
int viewWeight = YOUR_VIEW_TO_MEASURE.getWidth();
}
});
}
if you need to use this on method, use like this and to save the values you can use globle variables.
try with this metods:
int width = mView.getMeasuredWidth();
int height = mView.getMeasuredHeight();
Or
int width = mTextView.getMeasuredWidth();
int height = mTextView.getMeasuredHeight();
try something like this code from this link
ViewTreeObserver viewTreeObserver = view.getViewTreeObserver();
if (viewTreeObserver.isAlive()) {
viewTreeObserver.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
view.getViewTreeObserver().removeGlobalOnLayoutListener(this);
viewWidth = view.getWidth();
viewHeight = view.getHeight();
}
});
}
hope this helps.
As I just ran into this problem thought I would write it for kotlin,
my_view.viewTreeObserver.addOnGlobalLayoutListener {
// here your view is measured
// get height using my_view.height
// get width using my_view.width
}
or
my_view.post {
// here your view is measured
// get height using my_view.height
// get width using my_view.width
}
If you code in Kotlin use this nice extension function :
inline fun View.getDimensions(crossinline onDimensionsReady: (Int, Int) -> Unit) {
lateinit var layoutListener: ViewTreeObserver.OnGlobalLayoutListener
layoutListener = ViewTreeObserver.OnGlobalLayoutListener {
viewTreeObserver.removeOnGlobalLayoutListener(layoutListener)
onDimensionsReady(width, height)
}
viewTreeObserver.addOnGlobalLayoutListener(layoutListener)
}
Usage :
view.getDimensions { width, height ->
println("width = $width")
println("height = $height")
}
The first snippet is correct, but you need to call it after onMeasure() gets executed. Otherwise the size is not yet measured for the view.
For frame:
height=fr.getHeight();
width=fr.getWidth();
For screen:
width = getWindowManager().getDefaultDisplay().getWidth();
height = getWindowManager().getDefaultDisplay().getHeight();
I used DisplayMetrics to get the screen size and then i can assign the width/height to an element in %age
It will be like this
DisplayMetrics dmetrics = new DisplayMetrics();
int widthPixels=dmetrics.widthPixels;
int heightPixels=dmetrics.heightPixels;
//setting the height of the button
button_nextPuzzle.setMinHeight((int) ((heightPixels/3)*.30));
Worked for me very well!!!
Check behavior
Very Simple Solution
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
Log.d(LOG, "MainActivity - onCreate() called")
fragments_frame.post {
Log.d(LOG, " fragments_frame.height:${fragments_frame.width}")
Log.d(LOG, " fragments_frame.height:${fragments_frame.measuredWidth}")
}
}
getDefaultDisplay().getHeight is deprecated. So better to use
getResources().getDisplayMetrics().heightPixels;
you can use coroutines as well, like this one :
CoroutineScope(Dispatchers.Main).launch {
delay(10)
val width = view.width()
val height= view.height()
// do your job ....
}
I want to have an ImageView with width=fill_parent, and the height should be whatever the width is. I'm not sure if there's a way to specify that in xml, is the only option to create my own ImageView-derived class?:
public class MyImageView extends ImageView {
// Just return whatever the current width is?
private int measureHeight(int measureSpec) {
return getWidth();
}
}
Is this the way to go, any other options? (I'm not sure if the above is even correct, not sure if the width measurement even takes place before the height measurement for example)
Thanks
You can get the width with the method
imageView.getMeasuredWidth();
So, you can set it's height
imageView.setLayoutParams(new LayoutParams(imageView.getMeasuredWidth(), imageView.getMeasuredWidth()));
Make layout height equal to the width:
The problem with digulino's answer (in my case at least) is that if you want to change the dimensions in the start, getMeasuredWidth() will return 0 because the views haven't been drawn yet.
You can still do it by using a Runnable() thread like this:
FrameLayout frame = (FrameLayout)findViewById(R.id.myFrame);
frame.post(new Runnable() {
#Override
public void run() {
RelativeLayout.LayoutParams lparams;
lparams = (RelativeLayout.LayoutParams) frame.getLayoutParams();
lparams.height = frame.getWidth();
frame.setLayoutParams(lparams);
frame.postInvalidate();
}
});
Important Note:
This example assumes your view is a FrameLayout inside a RelativeLayout. Change it accordingly for other layouts.
How to find the Width of the a view before the view is displayed? I do not want to add a custom view and tap the dimensions in the OnChanged().
Display display = getWindowManager().getDefaultDisplay();
View view = findViewById(R.id.YOUR_VIEW_ID);
view.measure(display.getWidth(), display.getHeight());
view.getMeasuredWidth(); // view width
view.getMeasuredHeight(); //view height
#dmytrodanylyk -- I think it will return width & height as 0 so you need to use following thing
LayoutInflater inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View contentview = inflater.inflate(R.layout.YOURLAYOUTNAME, null, false);
contentview.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
int width = contentview.getMeasuredWidth();
int height = contentview.getMeasuredHeight();
It will give you right height & width.
You should use OnGlobalLayoutListener which is called for changes on the view, but before it is drawn.
costumView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
costumView.getWidth();
}
});
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
view.measure(size.x, size.y);
int width = view.getMeasuredWidth();
int height = view.getMeasuredHeight();
I like to use this technique as per my answer on a related question:
Post a runnable from onCreate() that will be executed when the view has been created:
contentView = findViewById(android.R.id.content);
contentView.post(new Runnable()
{
public void run()
{
contentHeight = contentView.getHeight();
}
});
This code will run on the main UI thread, after onCreate() has finished.
This is the best way...... WORK!!!
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
if (fondo_iconos_height==0) { // to ensure that this does not happen more than once
fondo_iconos.getLocationOnScreen(loc);
fondo_iconos_height = fondo_iconos.getHeight();
redraw_function();
}
}
Is it possible to detect if some part of the view is not visible on the screen?
This is used in a situation that view's width/height is bigger that its parent's width/height.
EDIT
I get that the height of a view is 0. Does anyone knows why? I fetch the height in onCreate.
LinearLayout lin = (LinearLayout) findViewById(R.id.linear_layout);
final int layoutHeight = lin.getHeight();
Toast.makeText(this,"LinLay height: "+layoutHeight,Toast.LENGTH_SHORT).show();
...
button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
int displayTextWidth = textView.getWidth();
if (displayTextWidth <= layoutHeight) {
textView.setTextSize(textView.getTextSize() + 1);
}
}
});
You could get the view's width and height by calling View.getWidth() and View.getHeight(), then get the device dimensions by these means: How do I get a device's maximal width and height in android
Then compare the two, and if the view's bounds are larger than your device's bounds, then some parts of the view are not visible.
In response to comments:
textView.post( new Runnable() {
#Override
public void run() {
int displayTextWidth = textView.getWidth();
// Code that uses width here...
}
});