In Android App development,I want to create a Linear Vertical layout as my main Screen
. and some 'n' textviews in it , and whenever i click on any of the textviews , it must direct to any of the layouts that I have created . How to do that ?
Well there is listview or recycler view for that. But as per your requirement, and as you mentioned N textviews, I am going to assume you want to create those text views programatically where N is dependant on some other parameter of your application. Here is how you do it:
public class YourActivity extends Activity implements View.OnClickListener{
TextView [] tvs = new TextView[N];
public void onCreate(Bundle savedInstance){
super.onCreate(savedInstance);
LayoutParams lpView = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
LinearLayout rootView = (LinearLayout)findViewById(R.id.your_id_of_ll);
for (int i = 0 ; i < N ; i++){
tvs[i] = new TextView(this); //this or reference to activity
tvs[i].setText("TextView " + i);
tvs[i].setLayoutParams(lpView);
tvs[i].setTag(i);
tvs[i].setOnClickListener(this);
rootView.addView(tvs[i]);
}
}
public void onClick(View v) {
int tag = (int)v.getTag();
System.out.println("TextView with tag " + tag + " Clicked");
}
}
Related
Depending on the screen size (and device idiom?) the width of the master page varies: On phones it is about 80 % of the screen width, while on tablets it seems to be a constant dimension like 320 dp.
Does anybody know a general formula for this value? I'd like to use it for laying out some elements during construction time, when the Width property isn't set, yet.
Edit:
I know how to get the current screen size. But how does the width of the presented master page of Xamarin.Form's master-detail page relate to it? It doesn't cover the whole screen, but fills a different fraction of it depending on the device.
You could request the device's actual screen width, height, and scale factor.
(From https://github.com/mattregul/Xamarin_GetDeviceScreensize)
iOS AppDelegate.cs
[Register("AppDelegate")]
public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
{
public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
global::Xamarin.Forms.Forms.Init();
// Store off the device sizes, so we can access them within Xamarin Forms
App.DisplayScreenWidth = (double)UIScreen.MainScreen.Bounds.Width;
App.DisplayScreenHeight = (double)UIScreen.MainScreen.Bounds.Height;
App.DisplayScaleFactor = (double)UIScreen.MainScreen.Scale;
LoadApplication(new App());
return base.FinishedLaunching(app, options);
}
}
Android MainActivity.cs
[Activity(Label = "Xamarin_GetDeviceScreensize.Droid", Icon = "#drawable/icon", Theme = "#style/MyTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
protected override void OnCreate(Bundle bundle)
{
TabLayoutResource = Resource.Layout.Tabbar;
ToolbarResource = Resource.Layout.Toolbar;
base.OnCreate(bundle);
// Store off the device sizes, so we can access them within Xamarin Forms
App.DisplayScreenWidth = (double)Resources.DisplayMetrics.WidthPixels / (double)Resources.DisplayMetrics.Density; // Width = WidthPixels / Density
App.DisplayScreenHeight = (double)Resources.DisplayMetrics.HeightPixels / (double)Resources.DisplayMetrics.Density; // Height = HeightPixels / Density
App.DisplayScaleFactor = (double)Resources.DisplayMetrics.Density;
global::Xamarin.Forms.Forms.Init(this, bundle);
LoadApplication(new App());
}
}
Xamarin Forms App.cs
public class App : Application
{
public static double DisplayScreenWidth;
public static double DisplayScreenHeight;
public static double DisplayScaleFactor;
public App()
{
string ScreenDetails = Device.OS.ToString() + " Device Screen Size:\n" +
$"Width: {DisplayScreenWidth}\n" +
$"Height: {DisplayScreenHeight}\n" +
$"Scale Factor: {DisplayScaleFactor}";
// The root page of your application
var content = new ContentPage
{
Title = "Xamarin_GetDeviceScreensize",
Content = new StackLayout
{
VerticalOptions = LayoutOptions.Center,
Children = {
new Label {
HorizontalTextAlignment = TextAlignment.Center,
FontSize = Device.GetNamedSize (NamedSize.Large, typeof(Label)),
Text = ScreenDetails
}
}
}
};
MainPage = new NavigationPage(content);
}
}
So I have a TextArea and as the user pastes paragraphs into it, or just writes in it, I want it to expand vertically to reveal all the available text. I.e. not to use a scrollbar in the text field itself... much like what happens on many web pages. Many users, myself included, don't like to be forced to edit in a small window. Exactly how Facebook status updates box works.
I've tried
myTextArea.autoSize()
wrapped in an
myTextArea.textProperty().addListener(new ChangeListener()....);
but that doesn't work. I think it's happy autosizing to its current size.
The left, right & top anchors are set to it's parent AnchorPane. I've tried it with the bottom attached and not attached. Ideally I'd like to grow the anchor pane as the textarea grows.
I don't mind reading the TextProperty and calculating a trigger size which I set myself... but this seems a hacky approach IF there is already a best practise. The number of properties and sub objects of javafx is sufficiently daunting that it seems like a good point to ask the question here, rather than trying to figure out how many pixels the font/paragraphs etc are taking up.
Update:
So I thought maybe I was overthinking it, and all I needed to do was to switch the scrollbars off and the rest would happen. Alas, looking for available fields and methods for "scroll", "vertical", "vbar" comes up with nothing I can use. ScrollTopProperty looks like it's for something else.
The problem; the height of textArea is wanted to be grown or shrunk while its text is changing by either user's typing or copy-pasting. Here is another approach:
public class TextAreaDemo extends Application {
private Text textHolder = new Text();
private double oldHeight = 0;
#Override
public void start(Stage primaryStage) {
final TextArea textArea = new TextArea();
textArea.setPrefSize(200, 40);
textArea.setWrapText(true);
textHolder.textProperty().bind(textArea.textProperty());
textHolder.layoutBoundsProperty().addListener(new ChangeListener<Bounds>() {
#Override
public void changed(ObservableValue<? extends Bounds> observable, Bounds oldValue, Bounds newValue) {
if (oldHeight != newValue.getHeight()) {
System.out.println("newValue = " + newValue.getHeight());
oldHeight = newValue.getHeight();
textArea.setPrefHeight(textHolder.getLayoutBounds().getHeight() + 20); // +20 is for paddings
}
}
});
Group root = new Group(textArea);
Scene scene = new Scene(root, 300, 250);
primaryStage.setScene(scene);
primaryStage.show();
// See the explanation below of the following line.
// textHolder.setWrappingWidth(textArea.getWidth() - 10); // -10 for left-right padding. Exact value can be obtained from caspian.css
}
public static void main(String[] args) {
launch(args);
}
}
But it has a drawback; the textarea's height is changing only if there are line breaks (ie Enter keys) between multiple lines, if the user types long enough the text gets wrapped to multiple line but the height is not changing.
To workaround this drawback I added this line
textHolder.setWrappingWidth(textArea.getWidth() - 10);
after primaryStage.show();. It works well for long typings where user does not linebreaks. However this generates another problem. This problem occurs when the user is deleting the text by hitting "backspace". The problem occurs exactly when the textHolder height is changed and where the textArea's height is set to new value. IMO it maybe a bug, didn't observe deeper.
In both case the copy-pasting is handling properly.
Awaiting a better, i use this hacky solution.
lookup the vertical scrollbar of the textarea.
make it transparent
listen to its visible property
when the scrollbar become visible i add a row to the textarea.
The code:
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.ObservableList;
import javafx.geometry.Orientation;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.ScrollBar;
import javafx.scene.control.TextArea;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;
public class GrowGrowTextArea extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) throws Exception {
AnchorPane root = new AnchorPane();
root.setStyle("-fx-padding:20;-fx-background-color:dodgerblue;");
final TextArea textArea = new TextArea();
AnchorPane.setTopAnchor(textArea, 10.0);
AnchorPane.setLeftAnchor(textArea, 10.0);
AnchorPane.setRightAnchor(textArea, 10.0);
root.getChildren().add(textArea);
primaryStage.setScene(new Scene(root, 400, 300));
primaryStage.show();
ScrollBar scrollBar = lookupVerticalScrollBar(textArea);
scrollBar.setOpacity(0.0);
scrollBar.visibleProperty().addListener(new ChangeListener<Boolean>() {
#Override
public void changed(ObservableValue<? extends Boolean> source,
Boolean wasVisible,
Boolean isVisible) {
if (isVisible) {
textArea.setPrefRowCount(textArea.getPrefRowCount() + 1);
textArea.requestLayout();
}
}
});
}
private ScrollBar lookupVerticalScrollBar(Node node) {
if (node instanceof ScrollBar && ((ScrollBar)node).getOrientation() == Orientation.VERTICAL) {
return (ScrollBar) node;
}
if (node instanceof Parent) {
ObservableList<Node> children = ((Parent) node).getChildrenUnmodifiable();
for (Node child : children) {
ScrollBar scrollBar = lookupVerticalScrollBar(child);
if (scrollBar != null) {
return scrollBar;
}
}
}
return null;
}
}
I had a similar problem with creating expanding TextArea. I was creating TextArea that looks like TextField and expand vertically every time when there is no more space in line.
I have tested all solutions that I could find on this topic on stack and other sources available. I found few good solutions but neither was good enough.
After many hours of fighting, I figured out this approach.
I extended TextArea class, override layoutChildren() method and add a listener on text height.
#Override
protected void layoutChildren() {
super.layoutChildren();
setWrapText(true);
addListenerToTextHeight();
}
private void addListenerToTextHeight() {
ScrollPane scrollPane = (ScrollPane) lookup(".scroll-pane");
scrollPane.setHbarPolicy(ScrollBarPolicy.NEVER);
scrollPane.setVbarPolicy(ScrollBarPolicy.NEVER);
StackPane viewport = (StackPane) scrollPane.lookup(".viewport");
Region content = (Region) viewport.lookup(".content");
Text text = (Text) content.lookup(".text");
text.textProperty().addListener(textHeightListener(text));
}
private InvalidationListener textHeightListener(Text text) {
return (property) -> {
// + 1 for little margin
double textHeight = text.getBoundsInLocal().getHeight() + 1;
//To prevent that our TextArena will be smaller than our TextField
//I used DEFAULT_HEIGHT = 18.0
if (textHeight < DEFAULT_HEIGHT) {
textHeight = DEFAULT_HEIGHT;
}
setMinHeight(textHeight);
setPrefHeight(textHeight);
setMaxHeight(textHeight);
};
}
I used some of the code found in the previous answers.
The growTextAreaIfNecessary method will increase the height of textArea until the scrollbar is not visible (limited to 20 lines in this example).
The problem with this approach is that the window needs to be redrawn several times until the perfect height is found.
private ScrollBar lookupVerticalScrollBar(Node node) {
if (node instanceof ScrollBar && ((ScrollBar) node).getOrientation() == Orientation.VERTICAL) {
return (ScrollBar) node;
}
if (node instanceof Parent) {
ObservableList<Node> children = ((Parent) node).getChildrenUnmodifiable();
for (Node child : children) {
ScrollBar scrollBar = lookupVerticalScrollBar(child);
if (scrollBar != null) {
return scrollBar;
}
}
}
return null;
}
private void growTextAreaIfNecessary(TextArea textArea) {
Platform.runLater(() -> {
ScrollBar lookupVerticalScrollBar = lookupVerticalScrollBar(textArea);
int prefRowCount = textArea.getPrefRowCount();
if (lookupVerticalScrollBar.isVisible() && prefRowCount < 20) {
textArea.setPrefRowCount(prefRowCount + 1);
System.out.println("increasing height to: " + (prefRowCount + 1));
growTextAreaIfNecessary(textArea);
}
});
}
I have tried many hacks, most of them had jitters while typing, this to me was the perfect result:
textArea.textProperty().addListener((obs,old,niu)->{
Text t = new Text(old+niu);
t.setFont(textArea.getFont());
StackPane pane = new StackPane(t);
pane.layout();
double height = t.getLayoutBounds().getHeight();
double padding = 20 ;
textArea.setMinHeight(height+padding);
});
i am developing some web service based android application ...i want to show below type table view in my application..how can i do?
dynamic table layout code
for (int i = 0; i < 1; i++) {
final LinearLayout linear = new LinearLayout(
FifthActivity.this);
MainLayout.setWeightSum(1.0f);
TableRow row1 = new TableRow(FifthActivity.this);
row1.setId(1000 + sCount);
TextView text1 = new TextView(FifthActivity.this);
text1.setText(button.getText());
final Button button = new Button(FifthActivity.this);
EditText e = new EditText(FifthActivity.this);
e.setWidth(20);
e.setHeight(20);
button.setText(" X ");
button.setWidth(20);
button.setHeight(20);
button.setId(2000 + sCount);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
MainLayout.removeView(findViewById(v
.getId() - 1000));
}
});
sCount++;
row1.setLayoutParams(new TableLayout.LayoutParams(TableLayout.LayoutParams.MATCH_PARENT, 0, 0.25f));
row1.addView(text1);
row1.addView(e);
row1.addView(button);
MainLayout.addView(row1);
}
ll.addView(MainLayout);
// TODO Auto-generated method stub
here's output
how can i align this table column as view format....pls any one help me....
thank in advance.....
You shouldn't need to call setWeightSum() on your parents.
What is the type of your MainLayout ?
I guess its not a TableLayout since table rows in TableLayout get aligned automatically.
So making your MainLayout a TableLayout should do what you want.
see the TableLayout documentation here.
Is there a default view that allows a number textbox, which can be changed by typing in the textbox or by two adjacent knobs by the textbox. So basically, in awesome ASCII graphics:
[<] [textbox] [>]
Basically an increment button, textbox, and decrement button.
Since API level 11, you can now use the NumberPicker;
You can find the documentation here
You can find an example here
My custom solution using EditText and two Button objects:
// This is a textbox group with two knob buttons
LinearLayout boxGroup = new LinearLayout(this);
boxGroup.setOrientation(LinearLayout.HORIZONTAL);
//Stores the current value in the textbox
final int[] value = {0};
// Editable text box
final EditText editText = new EditText(this);
editText.setText("" + value[0]);
// Decrement button
Button decrementButton = new Button(this);
decrementButton.setText("<");
decrementButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
value[0]++;
editText.setText("" + value[0]);
}
});
// Increment button
Button incrementButton = new Button(this);
incrementButton.setText(">");
incrementButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
value[0]--;
editText.setText("" + value[0]);
}
});
boxGroup.addView(decrementButton);
boxGroup.addView(editText);
boxGroup.addView(incrementButton);
I'm trying to determine the real dimension in pixels of some UI elements !
Those elements are inflated from a .xml file and are initialized with dip width and height so that the GUI will eventually support multiple screen size and dpi (as recommended by android specs).
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="150dip"
android:orientation="vertical">
<ImageView
android:id="#+id/TlFrame"
android:layout_width="110dip"
android:layout_height="90dip"
android:src="#drawable/timeline_nodrawing"
android:layout_margin="0dip"
android:padding="0dip"/></LinearLayout>
This previous xml represent one frame. But I do add many dynamically inside a horizontal layout describe here :
<HorizontalScrollView
android:id="#+id/TlScroller"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_margin="0dip"
android:padding="0dip"
android:scrollbars="none"
android:fillViewport="false"
android:scrollbarFadeDuration="0"
android:scrollbarDefaultDelayBeforeFade="0"
android:fadingEdgeLength="0dip"
android:scaleType="centerInside">
<!-- HorizontalScrollView can only host one direct child -->
<LinearLayout
android:id="#+id/TimelineContent"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_margin="0dip"
android:padding="0dip"
android:scaleType="centerInside"/>
</HorizontalScrollView >
The method defined to add one frame inside my java code :
private void addNewFrame()
{
LayoutInflater inflater = (LayoutInflater) _parent.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.tl_frame, null);
TextView frameNumber = (TextView) root.findViewById(R.id.FrameNumber);
Integer val = new Integer(_nFramesDisplayed+1); //+1 to display ids starting from one on the user side
frameNumber.setText(val.toString());
++_nFramesDisplayed;
_content.addView(root);
// _content variable is initialized like this in c_tor
// _content = (LinearLayout) _parent.findViewById(R.id.TimelineContent);
}
Then inside my code, I try to get the actual real size in pixel because I need this to draw some opengl stuff over it.
LayoutInflater inflater = (LayoutInflater) _parent.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.tl_frame, null);
ImageView frame = (ImageView) root.findViewById(R.id.TlFrame);
frame.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
frame.measure(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
final int w = frame.getMeasuredWidth();
final int h = frame.getMeasuredHeight();
Everything seems to work fine except that those values are way bigger than the actual pixel size of the ImageView.
Reported infos from getWindowManager().getDefaultDisplay().getMetrics(metrics);
are the following :
density = 1,5
densityDpi = 240
widthPixel = 600
heightPixel = 1024
Now, I know the rule from android is : pixel = dip * (dpi /160). But nothing makes any sense with the value returned. For that ImageView of (90dip X 110dip), the returned values of the measure() method is (270 x 218) which I assumed is in pixel !
Anyone has any idea why ?
Is the value returned in pixel ?
By the way : I've been testing the same code but with a TextView instead than an ImageView and everything seems to be working fine ! Why !?!?
You're calling measure incorrectly.
measure takes MeasureSpec values which are specially packed by MeasureSpec.makeMeasureSpec. measure ignores LayoutParams. The parent doing the measuring is expected to create a MeasureSpec based on its own measurement and layout strategy and the child's LayoutParams.
If you want to measure the way that WRAP_CONTENT usually works in most layouts, call measure like this:
frame.measure(MeasureSpec.makeMeasureSpec(maxWidth, MeasureSpec.AT_MOST),
MeasureSpec.makeMeasureSpec(maxHeight, MeasureSpec.AT_MOST));
If you don't have max values (for example if you're writing something like a ScrollView that has infinite space) you can use the UNSPECIFIED mode:
frame.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
Do that:
frame.measure(0, 0);
final int w = frame.getMeasuredWidth();
final int h = frame.getMeasuredHeight();
Solved!
Ok ! Kind of Answering my own question here...But not completly
1 - It seems that on some devices, The ImageView measuring do not provide with exact values. I've seen lots of reports on this happenning on Nexus and Galaxy devices for example.
2 - A work around that I've come up with :
Set the width and height of your ImageView to "wrap_content" inside xml code.
Inflate the layout inside your code (generally in the UI initialization I suppose).
LayoutInflater inflater = (LayoutInflater)
_parent.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.tl_frame, null);
ImageView frame = (ImageView) root.findViewById(R.id.TlFrame);
Calculate your own ratio for your image view, based on the typical Android calculation
//ScreenDpi can be acquired by getWindowManager().getDefaultDisplay().getMetrics(metrics);
pixelWidth = wantedDipSize * (ScreenDpi / 160)
Use the calculated size to set your ImageView dynamycally inside your code
frame.getLayoutParams().width = pixeWidth;
And voila ! your ImageView has now the wanted Dip size ;)
view.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
#SuppressLint("NewApi")
#SuppressWarnings("deprecation")
#Override
public void onGlobalLayout() {
//now we can retrieve the width and height
int width = view.getWidth();
int height = view.getHeight();
//this is an important step not to keep receiving callbacks:
//we should remove this listener
//I use the function to remove it based on the api level!
if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN){
view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
}else{
view.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
}
});
One should go with How to get width/height of a View
Unfortunately, in Activity lifecycle methods such as Activity#onCreate(Bundle), a layout pass has not yet been performed, so you can't yet retrieve the size of views in your view hierarchy. However, you can explicitly ask Android to measure a view using View#measure(int, int).
As #adamp's answer points out, you have to provide View#measure(int, int) with MeasureSpec values, but it can be a bit daunting figuring out the correct MeasureSpec.
The following method tries to determine the correct MeasureSpec values and measures the passed in view:
public class ViewUtil {
public static void measure(#NonNull final View view) {
final ViewGroup.LayoutParams layoutParams = view.getLayoutParams();
final int horizontalMode;
final int horizontalSize;
switch (layoutParams.width) {
case ViewGroup.LayoutParams.MATCH_PARENT:
horizontalMode = View.MeasureSpec.EXACTLY;
if (view.getParent() instanceof LinearLayout
&& ((LinearLayout) view.getParent()).getOrientation() == LinearLayout.VERTICAL) {
ViewGroup.MarginLayoutParams lp = (ViewGroup.MarginLayoutParams) view.getLayoutParams();
horizontalSize = ((View) view.getParent()).getMeasuredWidth() - lp.leftMargin - lp.rightMargin;
} else {
horizontalSize = ((View) view.getParent()).getMeasuredWidth();
}
break;
case ViewGroup.LayoutParams.WRAP_CONTENT:
horizontalMode = View.MeasureSpec.UNSPECIFIED;
horizontalSize = 0;
break;
default:
horizontalMode = View.MeasureSpec.EXACTLY;
horizontalSize = layoutParams.width;
break;
}
final int horizontalMeasureSpec = View.MeasureSpec
.makeMeasureSpec(horizontalSize, horizontalMode);
final int verticalMode;
final int verticalSize;
switch (layoutParams.height) {
case ViewGroup.LayoutParams.MATCH_PARENT:
verticalMode = View.MeasureSpec.EXACTLY;
if (view.getParent() instanceof LinearLayout
&& ((LinearLayout) view.getParent()).getOrientation() == LinearLayout.HORIZONTAL) {
ViewGroup.MarginLayoutParams lp = (ViewGroup.MarginLayoutParams) view.getLayoutParams();
verticalSize = ((View) view.getParent()).getMeasuredHeight() - lp.topMargin - lp.bottomMargin;
} else {
verticalSize = ((View) view.getParent()).getMeasuredHeight();
}
break;
case ViewGroup.LayoutParams.WRAP_CONTENT:
verticalMode = View.MeasureSpec.UNSPECIFIED;
verticalSize = 0;
break;
default:
verticalMode = View.MeasureSpec.EXACTLY;
verticalSize = layoutParams.height;
break;
}
final int verticalMeasureSpec = View.MeasureSpec.makeMeasureSpec(verticalSize, verticalMode);
view.measure(horizontalMeasureSpec, verticalMeasureSpec);
}
}
Then you can simply call:
ViewUtil.measure(view);
int height = view.getMeasuredHeight();
int width = view.getMeasuredWidth();
Alternatively, as #Amit Yadav suggested, you can use OnGlobalLayoutListener to have a listener called after the layout pass has been performed. The following is a method that handles unregistering the listener and method naming changes across versions:
public class ViewUtil {
public static void captureGlobalLayout(#NonNull final View view,
#NonNull final ViewTreeObserver.OnGlobalLayoutListener listener) {
view.getViewTreeObserver()
.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
final ViewTreeObserver viewTreeObserver = view.getViewTreeObserver();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
viewTreeObserver.removeOnGlobalLayoutListener(this);
} else {
//noinspection deprecation
viewTreeObserver.removeGlobalOnLayoutListener(this);
}
listener.onGlobalLayout();
}
});
}
}
Then you can:
ViewUtil.captureGlobalLayout(rootView, new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
int width = view.getMeasureWidth();
int height = view.getMeasuredHeight();
}
});
Where rootView can be the root view of your view hierarchy and view can be any view within your hierarchy that you want to know the dimensions of.
You have to create Custom Textview and use it in your layouts and use getActual height function to set the height at runtime
public class TextViewHeightPlus extends TextView {
private static final String TAG = "TextViewHeightPlus";
private int actualHeight=0;
public int getActualHeight() {
return actualHeight;
}
public TextViewHeightPlus(Context context) {
super(context);
}
public TextViewHeightPlus(Context context, AttributeSet attrs) {
super(context, attrs);
setCustomFont(context, attrs);
}
public TextViewHeightPlus(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
#Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
actualHeight=0;
actualHeight=(int) ((getLineCount()-1)*getTextSize());
}
}
Probably, because of what you have in AndroidManifest.xml (link) file and from which drawable-XXX directory the xml file comes, Android loads resources with scaling operation. You decide to use "dip" (link) dimension unit which is virtual and the real value (px) can be different.