Create elements at runtime on Android

Question

You can create elements at runtime on Android?

For example, I want to build an app where the user can create a survey or Checklist and save to the database.

Depending on the questions or items to be checked, which were created by the user, the application would assemble the elements for the user’s actions.

It is possible?

Answer 1

Yes, it is possible. You can use the addView() method in any Viewgroup as Linearlayout, Relativelayout, etc. Follow an example:

package com.example.androidview;

import android.os.Bundle;
import android.app.Activity;
import android.widget.Button;
import android.widget.LinearLayout;

public class MainActivity extends Activity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  LinearLayout mainLayout = 
    (LinearLayout)findViewById(R.id.mainlayout);

  //newButton added to the existing layout
  Button newButton = new Button(this);
  newButton.setText("Hello");
  mainLayout.addView(newButton);

  //anotherLayout and anotherButton added 
  //using addContentView()
  LinearLayout anotherLayout = new LinearLayout(this);
  LinearLayout.LayoutParams linearLayoutParams = 
    new LinearLayout.LayoutParams(
      LinearLayout.LayoutParams.WRAP_CONTENT,
      LinearLayout.LayoutParams.WRAP_CONTENT);

  Button anotherButton = new Button(this);
  anotherButton.setText("I'm another button");
  anotherLayout.addView(anotherButton);

  addContentView(anotherLayout, linearLayoutParams);
 }

}

More details here:

http://android-coding.blogspot.com.br/2013/10/add-view-programmatically-using-addview.html

Answer 2

Yes, it is possible to create interface elements at runtime. Something like:

//...
parent.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
parent.setOrientation(LinearLayout.HORIZONTAL);

TextView tv = new TextView(context);
parent.addView(tv);
//...

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