Develop Reference

Flow textview around image

I've spent hours looking for answer and have really no idea how to solve it. So let's get down to business:
There is an image and a TextView and I need to flow the TextView around the ImageView like this:
First possible solution woult be to use https://github.com/deano2390/FlowTextView but it's not extending TextView so this library is not suitable for me for number of reasons.
Second solution would be to use LeadingMarginSpan.LeadingMarginSpan2 span but it affects on each paragraph for each n lines inside the text (like in this answer -> How to layout text to flow around an image), so I get smth like this:
But I wanted to set margin only for first n lines! Then I decided to implement LeadingMarginSpan.Standart and create a counter and increment it in getLeadingMargin(first: Boolean): Int function invocation. When the counter reach the desirable value, the function returns 0 as a margin width. And there is a fail again! Instead of filling the TextView lines, the text just moved left and didn't spread to the end of the view!
UPD: Yes, I've used onGlobalLayoutListener in here
Well, googling for another solution I found this answer https://stackoverflow.com/a/27064368/7218592
Ok, I've done everything as described and implemented the code:
//set left margin of desirable width
val params: RelativeLayout.LayoutParams = RelativeLayout.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)
params.leftMargin = holder.imageContainerHeight!!
params.addRule(RelativeLayout.BELOW, holder.mNumberAndTimeInfo!!.id)
holder.mCommentTextView!!.layoutParams = params
if (holder.commentTextViewOnGlobalLayoutListener != null)
holder.mCommentTextView!!.viewTreeObserver.removeOnGlobalLayoutListener(
holder.commentTextViewOnGlobalLayoutListener)
//add onGlobalLayoutListener
holder.mCommentTextView!!.viewTreeObserver.addOnGlobalLayoutListener(
if (holder.commentTextViewOnGlobalLayoutListener != null)
holder.commentTextViewOnGlobalLayoutListener
else CommentTextViewOnGlobalLayoutListener(holder,
SpannableString(HtmlCompat.fromHtml(
mView.getActivity(), commentDocument.html(), 0,
null, SpanTagHandlerCompat(mView.getActivity())))))`
My OnGlobalLayoutListener looks like this: `
class CommentTextViewOnGlobalLayoutListener(
val holder: CommentAndFilesListViewViewHolder, val commentSpannable: Spannable) :
ViewTreeObserver.OnGlobalLayoutListener {
val LOG_TAG: String = CommentTextViewOnGlobalLayoutListener::class.java.simpleName
override fun onGlobalLayout() {
holder.mCommentTextView!!.viewTreeObserver.removeGlobalOnLayoutListener(this)
//when textview layout is drawn, get the line end to spanify only the needed text
val charCount = holder.mCommentTextView!!.layout.getLineEnd(Math.min(
holder.mCommentTextView!!.layout.lineCount - 1,
CommentLeadingMarginSpan.computeLinesToBeSpanned(holder)))
if (charCount <= commentSpannable.length) {
commentSpannable.setSpan(CommentLeadingMarginSpan(holder),
0, charCount, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
}
//set the left margin back to zero
(holder.mCommentTextView!!.layoutParams as RelativeLayout.LayoutParams).leftMargin = 0
holder.mCommentTextView!!.text = commentSpannable
}
}
`
Well, it works. But how terrible it works! As I'm using view holder pattern I have to hold a variable to the listener and remove if it is not been called and successfully removed because onGlobalLayout function wasn't called in time! And it is called too late, so you need to wait about 300 ms and then watch all the "reconstruction" of the TextView and it looks disgustingly!
So, my question is:
How to make margins for first n lines in TextView, before it's been drawn on UI?

This is more a suggestion that will only work with a little trial and error
This code uses a multi line Edit Text
btnPrint.setOnClickListener {
val str = """
One
Two
Three
Now click Action Button Custom SB
""".trimIndent()
etNews.setText(str)
}
Play with the One Two values indent and trimIndent has other properties available

Android: When to call methods that affect child layout upon parent view size change?

I have a very simple RelativeLayout subclass that adds an image view with a text view on top of it. I have a method, show(), which creates and adds the child views and sets the initial text.
At the point I call show() for the first time, the view does not know how big it is, so I can't set the textSize nor the padding for the textView.
I have a solution that mostly works, where I call setTextSize() and setPadding() for the textView within the overridden method, onSizeChanged(). The text does not show the first time it is displayed. However, it shows every time after that, perfectly sized and placed.
Here is the code for onSizeChanged():
#Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
Log.e(TAG, "onSizeChanged() called");
if (_childTextView != null) {
float textSize = h / 2.0f;
int topPadding = (int)(h / 3.0f);
Log.e(TAG, "setting textSize = " + textSize);
Log.e(TAG, "topPadding = " + topPadding);
_childTextView.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
_childTextView.setPadding(0, topPadding, 0, 0);
}
super.onSizeChanged(w, h, oldw, oldh);
Log.e(TAG, "end onSizeChanged()");
}
The code for show() is as follows:
public void show(int val) {
_val = val;
Log.e(TAG, "in show(), val = " + val);
// create and add background image if not already there
if (_backgroundImageView == null) {
_backgroundImageView = new ImageView(_context);
_backgroundImageView.setImageResource(R.drawable.background);
LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
params.addRule(CENTER_IN_PARENT);
addView(_backgroundImageView, params);
}
// create and add text view if not already there
if (_childTextView == null) {
_childTextView = new TextView(_context);
_childTextView.setTextColor(Color.BLACK);
LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.addRule(CENTER_HORIZONTAL);
addView(_childTextView, params);
}
Log.e(TAG, "setting text to: " + _val);
// update value and make visible
_childTextView.setText(String.valueOf(_val));
setVisibility(VISIBLE);
Log.e(TAG, "end show()");
}
The background image displays correctly every time. The textView only displays correctly the second time show() is called and afterwards. Logging in onSizeChanged() shows that the calculated numbers are correct the first time. As expected, onSizeChanged() only gets called the first time, a bit after we return from show(). Subsequent calls to show() just set the value and visibility, and the text is displayed correctly.
My question is: is there a better way to do this? Or a better callback method to override?
Trying to set these values in show() doesn't work because the main view doesn't yet know its own size (at least the first time). I have tried putting invalidate() at the end of onSizeChanged(). I have also tried putting the call to setText() there.
I need to be able to do this based on size, because this class is reused in different contexts where the image needs to be smaller or larger.
Thank you for any insight you can give. I'd really like to keep this simple if possible.
Edit: What I am trying to do is size some text to be about 1/2 the size of the child image (which is the same as the parent size), and to have top padding set to about 1/3 of the image size. This would be easy if I just wanted it to be one size. However, I want it to be size-adjustable based on the needs of the display.
Imagine a postage stamp, where you want to place the value somewhere precisely in the image. So far so good. But what if this postage stamp needs to be displayed at different sizes on the same phone? You'd want both the placement offset (the padding) and the text size to adjust accordingly. If I hardcode this into the xml, then the text size and placement will not be adjusted when I size the layout. The text will be too big on the small version, and will be placed too far from the top of the image.

i have no idea why you override onSizeChanged(), normaly android handles all this nicely if you use it the way it is intendet.
can you pls explain what you want to achive - maybe with example picture?
however i wondered that you don't override onMesure() when you override the rest and if a delayed call to show() helps it also might be because of onMesure is called in between.
edit:
in android you should never want to know a real size of some views. nearly every device has other sizes and there is portrait/landscape mode too. if you start coding vs real sizes you can give up at the start. instead you should use something more relative like dp and sp than you should never again worry about text sizes and similar.
you may also want and you should use LayoutInflater and xml files as much as possible in your application. in a Activity you can call setContentView(). in other cases there might be methods to overload like onCreateView. and if you have nothing else you can do it like this:
LayoutInflater inflater = LayoutInflater.from(contextEgActivity);
View rootView = inflater.inflate(R.layout.highscore_daily, parentCanBeNull);
edit II:
so this is what you want - right? (on the ImageView and the TextView it would be even better to use wrap_content for height and width)
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<ImageView
android:layout_width="200dp"
android:layout_height="200dp"
android:id="#+id/imageView"
android:layout_gravity="center"
android:background="#ff0000" />
<TextView
android:layout_width="100dp"
android:layout_height="100dp"
android:text="New Text"
android:id="#+id/textView"
android:layout_gravity="center"
android:background="#00ff00"
android:textSize="20sp" />
</FrameLayout>
if you only have ~3 different sizes i would write 3 different xml files to match what you want. otherwise i think this code will fit your needs.
//http://stackoverflow.com/questions/4605527/converting-pixels-to-dp
public static float convertDpToPixel(float dp, Context context){
Resources resources = context.getResources();
DisplayMetrics metrics = resources.getDisplayMetrics();
float px = dp * (metrics.densityDpi / 160f);
return px;
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);//loads the xml above
ImageView v = (ImageView) findViewById(R.id.imageView);
int dp = 200;
int px = (int) convertDpToPixel(dp, this);
v.setMaxHeight(px);//no need for it
v.setMinimumHeight(px);//should do more or less the same as next line
v.setLayoutParams(new LinearLayout.LayoutParams(px, px));//is like android:layout_width="200dp" android:layout_height="200dp"
v.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, px));//is like android:layout_width="wrap_content" android:layout_height="200dp"
//basically you can do the same with the TextView + the Text styling
TextView tv = (TextView) findViewById(R.id.textView);
tv.setTextSize(TypedValue.COMPLEX_UNIT_SP, 50);
tv.setPadding(30,30,30,30);//don't forget, this is also px so you may need dp to px conversion
}
this is the normal way, nice clean and easy. if you why ever still want to react on size changes of your parent you can try this but i don't suggest it. btw changing view stuff should only be executed from ui/main thread so if the method gets called from a other thread thry a Handler like new Handler(getMainLooper)

Get content view size in onCreate

I'm looking for a good way to measure the dimensions of the actual content area for an activity in Android.
Getting display always works. Simply go like this:
Display display = getWindowManager().getDefaultDisplay();
And you can get the pixel count for the entire screen. Of course this does not take into consideration the ActionBar, status bar, or any other views which will reduce the available size of the activity itself.
Once the activity is running, you can do this:
View content = getWindow().findViewById(Window.ID_ANDROID_CONTENT);
To get the activity content only. But doing this in onCreate() will result in a view with width and height of 0, 0.
Is there a way to get these dimensions during onCreate? I imagine there ought to be a way to get the measurements of any status bars and just subtract that from the total display size, but I'm unable to find a way to do that. I think this would be the only way, because the content window method will always return a view with no width/height before it is drawn.
Thanks!

You can use a layout or pre-draw listener for this, depending on your goals. For example, in onCreate():
final View content = findViewById(android.R.id.content);
content.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
//Remove it here unless you want to get this callback for EVERY
//layout pass, which can get you into infinite loops if you ever
//modify the layout from within this method.
content.getViewTreeObserver().removeGlobalOnLayoutListener(this);
//Now you can get the width and height from content
}
});
Update
as of API 16 removeGlobalOnLayoutListener is deprecated.
Change to:
content.getViewTreeObserver().removeOnGlobalLayoutListener(this)

(copied from my answer to a related question)
I use the following technique - 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.

Answer with post is incorrect, because the size might not be recalculated.
Another important thing is that the view and all it ancestors must be visible. For that I use a property View.isShown.
Here is my kotlin function, that can be placed somewhere in utils:
fun View.onInitialized(onInit: () -> Unit) {
viewTreeObserver.addOnGlobalLayoutListener(object : OnGlobalLayoutListener {
override fun onGlobalLayout() {
if (isShown) {
viewTreeObserver.removeOnGlobalLayoutListener(this)
onInit()
}
}
})
}
And the usage is:
myView.onInitialized {
Log.d(TAG, "width is: " + myView.width)
}

This appears to be a duplicate question. There is an elegant answer within this SO question:
getWidth() and getHeight() of View returns 0
Which (shamelessly copied) is to override onWindowFocusChanged(), which seems to fire just after onCreate(), and where the sizes are rendered:
#Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
//Here you can get the size!
}

If you want lo load a Bitmap into a ImageView within OnCreate(), you can use this example to do it:
public static void setImageLater(#NonNull final ImageView imageView,final Bitmap bitmap){
final ViewTreeObserver observer = imageView.getViewTreeObserver();
observer.addOnGlobalLayoutListener(
new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
imageView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
imageView.setImageBitmap(bitmap);
}
});
}

You can do any work wich needs sizes in onResume(using flag like alreadyDone not to repeat it every time an Activity goes foreground). In onCreate views are not displayed, so it's normal that sizes are zeros.

Android: ImageView, LinearLayout and TextView heights returned negative, 0 and 0, why?

I am trying to scale the image in my linear layout to fill the available space, but I don't understand the values I'm getting for the widths of the layout. Here's the relevant part of my main.xml layout file:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/LeftButtonsLayout"
android:layout_width="0dip"
android:layout_height="fill_parent"
android:layout_weight="10"
android:orientation="vertical" >
<TextView
android:id="#+id/Jump"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/jump"
android:textStyle="bold"
android:padding="5dip"
/>
<ImageView
android:id="#+id/JumpButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:src="#drawable/jump"
android:contentDescription="#string/jump"
android:padding="5dip"
/>
<LinearLayout
Here's the onCreate() method of my activity, which has a debug print:
public void onCreate (Bundle savedInstanceState) {
setContentView(R.layout.main);
LinearLayout leftButtonsLayout = (LinearLayout) findViewById(R.id.LeftButtonsLayout);
imageView = (ImageView) findViewById(R.id.ResetButton);
Log.d("DEBUG", CLASS_NAME + "scaleLeftButtonsLayoutContents: \n" +
"linear layout height: " + leftButtonsLayout.getHeight() + "\n" +
"text height: " + ((TextView)findViewById(R.id.Jump)).getHeight() + "\n" +
"image height: " + imageView.getLayoutParams().height);
}
1) If I place the setContentVew() call after the Log.d() debug print, I get a Null Pointer Exception. Why? Is memory not allocated for the LinearLayout before it's used on the view?
2) The prints I see are:
linear layout height: 0
text height: 0
image height: -2
What am I doing wrong here? I expected to see sane values here, since I can see the imageView on the device screen.
3) I was planning to scale the image using:
imageView.getLayoutParams().height = newHeight. Is that right to do? Will doing this automatically update the imageView on the screen, or will I have to do a setContentView() again?
Thanks in advance for your help.
UPDATE
Thanks for your answers everyone. I've overridden the onWindowFocusChanged() method of my activity, but when I check the size of the nested ImageView below, it's reported as -2. Resizing it works, but I'm curious why it's -2 when it should've had a sane value. My code's as follows:
#Override
public void onWindowFocusChanged (boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
if (hasFocus)
scaleLeftButtonsLayoutContents();
}
private void scaleLeftButtonsLayoutContents () {
LinearLayout leftButtonsLayout = (LinearLayout)findViewById(R.id.LeftButtonsLayout);
imageView = (ImageView) findViewById(R.id.JumpButton);
Log.d("TAG", CLASS_NAME + "JumpButton.height " + imageView.getLayoutParams().height);
imageView.getLayoutParams().height = verticalSpaceAvailable;
imageView.getLayoutParams().width = verticalSpaceAvailable;
leftButtonsLayout.requestLayout();
}
This produces the print:
JumpButton.height -2
The resize produces a sane image, but why is the initial height -2?

To answer your points,
1) It is because you haven't initailaized your Button or ImageView. Since you call your Log before doing this, obviously the Button and ImageView are null and hence you get the exception.
2)And initializing doesn't mean that your view are completely drawn to provide you with width and height. So you have to provide the time to get itself drawn. But unfortuanately we don't know the exact time it takes to get drawn. So Android provides this method,
#Override
public void onWindowFocusChanged(boolean hasFocus)
{
// which gets called when your view is drawn.
}
Just now answered a similar question here.
So what you have to do is, add your Log inside this method in your Activity and then check the resulting width and height.
3) To answer your third question, you definitely should not call setContentView() once again, which might throw you some other exception. But when considering scaling you might make use of some bitmaps to do this.

Here are some answers for you:
1) If you place the setContentView after calling view.getHeight() you will get null pointer because that view is not set on the Activity content therefore you can't get a reference to it before setting it to the content of the Activity
2) You see that because the view doesn't had time to layout.. if you want to see the height/width of a view it's better to use a ViewTreeObserver listener like this:
view.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
/* don't forget to remove the listener after you use it once */
view.getViewTreeObserver().removeGlobalOnLayoutListener(this);
Log.d("MY VIEW WIDTH","width:"+view.getWidth());
}
});
3) After you set the layout params of a view don't forget to call view.requestLayout() to make sure that your view will refresh. You don't have to call setContentView() again.
EDIT: Also the width of your LinearLayout has to be at least wrap_content if not fill_parent or a value greater than 0 if you want to see the child views of the Linear Layout..

You cannot do like this. Because the linearlayout is the main container of your activity. You cannot provide android:layout_weight="10" and android:layout_width="0dip" to the main layout. create one Linear layout outside this android:id="#+id/LeftButtonsLayout" and give the layout height and width to fill_parent or match_parent. This will work in your case.
And one more thing, You cannot allow to call elements of layout before the setContentView.

How to retrieve the dimensions of a view?

I have a view made up of TableLayout, TableRow and TextView. I want it to look like a grid. I need to get the height and width of this grid. The methods getHeight() and getWidth() always return 0. This happens when I format the grid dynamically and also when I use an XML version.
How to retrieve the dimensions for a view?
Here is my test program I used in Debug to check the results:
import android.app.Activity;
import android.os.Bundle;
import android.widget.TableLayout;
import android.widget.TextView;
public class appwig extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.maindemo); //<- includes the grid called "board"
int vh = 0;
int vw = 0;
//Test-1 used the xml layout (which is displayed on the screen):
TableLayout tl = (TableLayout) findViewById(R.id.board);
tl = (TableLayout) findViewById(R.id.board);
vh = tl.getHeight(); //<- getHeight returned 0, Why?
vw = tl.getWidth(); //<- getWidth returned 0, Why?
//Test-2 used a simple dynamically generated view:
TextView tv = new TextView(this);
tv.setHeight(20);
tv.setWidth(20);
vh = tv.getHeight(); //<- getHeight returned 0, Why?
vw = tv.getWidth(); //<- getWidth returned 0, Why?
} //eof method
} //eof class

I believe the OP is long gone, but in case this answer is able to help future searchers, I thought I'd post a solution that I have found. I have added this code into my onCreate() method:
EDITED: 07/05/11 to include code from comments:
final TextView tv = (TextView)findViewById(R.id.image_test);
ViewTreeObserver vto = tv.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
LayerDrawable ld = (LayerDrawable)tv.getBackground();
ld.setLayerInset(1, 0, tv.getHeight() / 2, 0, 0);
ViewTreeObserver obs = tv.getViewTreeObserver();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
obs.removeOnGlobalLayoutListener(this);
} else {
obs.removeGlobalOnLayoutListener(this);
}
}
});
First I get a final reference to my TextView (to access in the onGlobalLayout() method). Next, I get the ViewTreeObserver from my TextView, and add an OnGlobalLayoutListener, overriding onGLobalLayout (there does not seem to be a superclass method to invoke here...) and adding my code which requires knowing the measurements of the view into this listener. All works as expected for me, so I hope that this is able to help.

I'll just add an alternative solution, override your activity's onWindowFocusChanged method and you will be able to get the values of getHeight(), getWidth() from there.
#Override
public void onWindowFocusChanged (boolean hasFocus) {
// the height will be set at this point
int height = myEverySoTallView.getMeasuredHeight();
}

You are trying to get width and height of an elements, that weren't drawn yet.
If you use debug and stop at some point, you'll see, that your device screen is still empty, that's because your elements weren't drawn yet, so you can't get width and height of something, that doesn't yet exist.
And, I might be wrong, but setWidth() is not always respected, Layout lays out it's children and decides how to measure them (calling child.measure()), so If you set setWidth(), you are not guaranteed to get this width after element will be drawn.
What you need, is to use getMeasuredWidth() (the most recent measure of your View) somewhere after the view was actually drawn.
Look into Activity lifecycle for finding the best moment.
http://developer.android.com/reference/android/app/Activity.html#ActivityLifecycle
I believe a good practice is to use OnGlobalLayoutListener like this:
yourView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
if (!mMeasured) {
// Here your view is already layed out and measured for the first time
mMeasured = true; // Some optional flag to mark, that we already got the sizes
}
}
});
You can place this code directly in onCreate(), and it will be invoked when views will be laid out.

Use the View's post method like this
post(new Runnable() {
#Override
public void run() {
Log.d(TAG, "width " + MyView.this.getMeasuredWidth());
}
});

I tried to use onGlobalLayout() to do some custom formatting of a TextView, but as #George Bailey noticed, onGlobalLayout() is indeed called twice: once on the initial layout path, and second time after modifying the text.
View.onSizeChanged() works better for me because if I modify the text there, the method is called only once (during the layout pass). This required sub-classing of TextView, but on API Level 11+ View. addOnLayoutChangeListener() can be used to avoid sub-classing.
One more thing, in order to get correct width of the view in View.onSizeChanged(), the layout_width should be set to match_parent, not wrap_content.

Are you trying to get sizes in a constructor, or any other method that is run BEFORE you get the actual picture?
You won't be getting any dimensions before all components are actually measured (since your xml doesn't know about your display size, parents positions and whatever)
Try getting values after onSizeChanged() (though it can be called with zero), or just simply waiting when you'll get an actual image.

As F.X. mentioned, you can use an OnLayoutChangeListener to the view that you want to track itself
view.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
#Override
public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
// Make changes
}
});
You can remove the listener in the callback if you only want the initial layout.

I guess this is what you need to look at: use onSizeChanged() of your view. Here is an EXTENDED code snippet on how to use onSizeChanged() to get your layout's or view's height and width dynamically http://syedrakibalhasan.blogspot.com/2011/02/how-to-get-width-and-height-dimensions.html

ViewTreeObserver and onWindowFocusChanged() are not so necessary at all.
If you inflate the TextView as layout and/or put some content in it and set LayoutParams then you can use getMeasuredHeight() and getMeasuredWidth().
BUT you have to be careful with LinearLayouts (maybe also other ViewGroups). The issue there is, that you can get the width and height after onWindowFocusChanged() but if you try to add some views in it, then you can't get that information until everything have been drawn. I was trying to add multiple TextViews to LinearLayouts to mimic a FlowLayout (wrapping style) and so couldn't use Listeners. Once the process is started, it should continue synchronously. So in such case, you might want to keep the width in a variable to use it later, as during adding views to layout, you might need it.

Even though the proposed solution works, it might not be the best solution for every case because based on the documentation for ViewTreeObserver.OnGlobalLayoutListener
Interface definition for a callback to be invoked when the global layout state or the visibility of views within the view tree changes.
which means it gets called many times and not always the view is measured (it has its height and width determined)
An alternative is to use ViewTreeObserver.OnPreDrawListener which gets called only when the view is ready to be drawn and has all of its measurements.
final TextView tv = (TextView)findViewById(R.id.image_test);
ViewTreeObserver vto = tv.getViewTreeObserver();
vto.addOnPreDrawListener(new OnPreDrawListener() {
#Override
public void onPreDraw() {
tv.getViewTreeObserver().removeOnPreDrawListener(this);
// Your view will have valid height and width at this point
tv.getHeight();
tv.getWidth();
}
});

Height and width are zero because view has not been created by the time you are requesting it's height and width . One simplest solution is
view.post(new Runnable() {
#Override
public void run() {
view.getHeight(); //height is ready
view.getWidth(); //width is ready
}
});
This method is good as compared to other methods as it is short and crisp.

You should rather look at View lifecycle: http://developer.android.com/reference/android/view/View.html Generally you should not know width and height for sure until your activity comes to onResume state.

You can use a broadcast that is called in OnResume ()
For example:
int vh = 0;
int vw = 0;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.maindemo); //<- includes the grid called "board"
registerReceiver(new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
TableLayout tl = (TableLayout) findViewById(R.id.board);
tl = (TableLayout) findViewById(R.id.board);
vh = tl.getHeight();
vw = tl.getWidth();
}
}, new IntentFilter("Test"));
}
protected void onResume() {
super.onResume();
Intent it = new Intent("Test");
sendBroadcast(it);
}
You can not get the height of a view in OnCreate (), onStart (), or even in onResume () for the reason that kcoppock responded

Simple Response: This worked for me with no Problem.
It seems the key is to ensure that the View has focus before you getHeight etc. Do this by using the hasFocus() method, then using getHeight() method in that order. Just 3 lines of code required.
ImageButton myImageButton1 =(ImageButton)findViewById(R.id.imageButton1);
myImageButton1.hasFocus();
int myButtonHeight = myImageButton1.getHeight();
Log.d("Button Height: ", ""+myButtonHeight );//Not required
Hope it helps.

Use getMeasuredWidth() and getMeasuredHeight() for your view.
Developer guide: View

CORRECTION:
I found out that the above solution is terrible. Especially when your phone is slow.
And here, I found another solution:
calculate out the px value of the element, including the margins and paddings:
dp to px:
https://stackoverflow.com/a/6327095/1982712
or dimens.xml to px:
https://stackoverflow.com/a/16276351/1982712
sp to px:
https://stackoverflow.com/a/9219417/1982712 (reverse the solution)
or dimens to px:
https://stackoverflow.com/a/16276351/1982712
and that's it.