How to Programmatically Add Views to Views

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Let's say I have a LinearLayout, and I want to add a View to it, in my program from the Java code. What method is used for this? I'm not asking how it's done in XML, which I do know, but rather, how can I do something along the lines of this sample code?

(One View).add(Another View)

Like one can do in Swing.

Calling addView is the correct answer, but you need to do a little more than that to get it to work.

If you create a View via a constructor (e.g., Button myButton = new Button();), you'll need to call setLayoutParams on the newly constructed view, passing in an instance of the parent view's LayoutParams inner class, before you add your newly constructed child to the parent view.

For example, you might have the following code in your onCreate() function assuming your LinearLayout has id R.id.main:

LinearLayout myLayout = findViewById(R.id.main);

Button myButton = new Button(this);
myButton.setLayoutParams(new LinearLayout.LayoutParams(
                                     LinearLayout.LayoutParams.MATCH_PARENT,
                                     LinearLayout.LayoutParams.MATCH_PARENT));

myLayout.addView(myButton);

Making sure to set the LayoutParams is important. Every view needs at least a layout_width and a layout_height parameter. Also getting the right inner class is important. I struggled with getting Views added to a TableRow to display properly until I figured out that I wasn't passing an instance of TableRow.LayoutParams to the child view's setLayoutParams.

How to programmatically add views to the LinearLayout in Android , In this short snippet we'll learn how to programmatically add views to the LinearLayout in Android. Last update 28.08.2018. Android programmatically add views - Button, TextView, EditText, RadioButton, CheckBox, ToggleButton Sometimes there is need for dynamically generating screen layout based on data from SQLITE database tables, such as question answer forms, etc.

for anyone yet interested:

the best way I found is to use the inflate static method of View.

View inflatedView = View.inflate(context, yourViewXML, yourLinearLayout);

where yourViewXML is something like R.layout.myView

please notice that you need a ViewGroup in order to add a view (which is any layout you can think of)

so as an example lets say you have a fragment which it view already been inflated and you know that the root view is a layout, and you want to add a view to it:

    View view = getView(); // returns base view of the fragment
    if (view == null)
        return;
    if (!(view instanceof ViewGroup))
        return;

    ViewGroup viewGroup = (ViewGroup) view;
    View popup = View.inflate(viewGroup.getContext(), R.layout.someView, viewGroup);

How to Dynamically Add Views into View in Android?, This example demonstrates How to Dynamically Add Views into View.Step 1 − Create a new project in Android Studio, go to File ⇒ New� Stack views use intrinsic content size, so use layout constraints to define the dimensions of the views. There is an easy way to add constraints quickly (example): [view1.heightAnchor constraintEqualToConstant:100].active = true; Complete Code:

This is late but this may help someone :) :) For adding the view programmatically try like

LinearLayout rlmain = new LinearLayout(this);      
LinearLayout.LayoutParams llp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT,LinearLayout.LayoutParams.FILL_PARENT);          
LinearLayout   ll1 = new LinearLayout (this);

ImageView iv = new ImageView(this);
iv.setImageResource(R.drawable.logo);              
LinearLayout .LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);

iv.setLayoutParams(lp);
ll1.addView(iv);
rlmain.addView(ll1);              
setContentView(rlmain, llp);

This will create your entire view programmatcally. You can add any number of view as same. Hope this may help. :)

How to Programmatically Add Views to Views, Calling addView is the correct answer, but you need to do a little more than that to get it to work. If you create a View via a constructor (e.g.,� Calling addView is the correct answer, but you need to do a little more than that to get it to work.. If you create a View via a constructor (e.g., Button myButton = new Button();), you'll need to call setLayoutParams on the newly constructed view, passing in an instance of the parent view's LayoutParams inner class, before you add your newly constructed child to the parent view.

LinearLayout is a subclass of ViewGroup, which has a method called addView. The addView method should be what you are after.

6 Adding Views Programmatically in Android, Android Teacher app : http://play.google.com/store/apps/details?id=sachin4droid. androidteacher.Duration: 10:44 Posted: Oct 18, 2017 That’s a helper method that takes a List of Integers (List) and returns an equivalent array of ints (int[]). Without it, you’ll have to iterate over your list of views and add each item’s ID to an array. That’s it! As you can see, chaining views programmatically is a little nuanced, but it’s not too difficult.

One more way to add view from Activity

ViewGroup rootLayout = findViewById(android.R.id.content);
rootLayout.addView(view);

Android programmatically add views , Android programmatically add views - Button, TextView, EditText, RadioButton, CheckBox, ToggleButton. Sometimes there is need for dynamically generating� Can you give me a very simple example of adding child view programmatically to RelativeLayout at a given position? For example, to reflect the following XML: <?xml version="1.0" encoding="utf

Programmatically Creating Views, It is sometimes necessary to programmatically create views. Follow Adding the subview as above will add the subview on top of the other subviews. You can� Hi, I had to implement the same functionality of changing values in exposed filter programmatically in drupal7 views. I have implemented this using hook_views_query_alter() instead of creating custom submit handler. And this works for me.

Chaining Views in a ConstraintLayout Programmatically, First, you need to add the views to the ConstraintLayout. Java. for(TextView tv : textViews) { tv. In the project, add a view template that you can use with the Index method. To do this, right-click inside the Index method and click Add View. The Add View dialog box appears. Leave the defaults the way they are and click the Add button: The MvcMovie\Views\HelloWorld folder and the MvcMovie\Views\HelloWorld\Index.cshtml file are created.

Swift 3 and iOS: Add views programmatically with , Swift 3 and iOS: Add views programmatically with NSLayoutConstraint and AutoLayout. You can add a view programmatically in a fixed position easily enough:

Comments
  • How would you create the view programmatically but by using an XML layout file you specifically wrote for this new view?
  • @SK9 You would use a LayoutInflater, which you can get from a Context, usually the current Activity. Something like: LayoutInflater myInflater = getLayoutInflater; View myView = myInflater.inflate(R.layout.myLayout, parent, false);
  • Actually getLayoutInflater() comes from the Window class (not Context), and it is a convenience method in Activity.
  • As a coding practice, on findViewById, cast to ViewGroup or always the most generic form of an object so that if it changes from a LinearLayout to a RelativeLayout, you have no refactoring.
  • These are some details :D
  • You could also write a static method, something like addView(View v){ // your code after get view } that would take a view found using findViewById(int resourceID) or inflated like your inflatedView... just to expand on your fragment example.