Hi all I am trying to run the attached code to display a checkbox when I click on the buttons.
My program crashes though and I can not see why.
Do you have any idea?
Thank you,
Sara
package Dynamiclayout.example.com;
import Dynamiclayout.example.com.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ScrollView;
import android.widget.LinearLayout;
import android.widget.Button;
import android.widget.CheckBox;
public class Dynamiclayout extends Activity {
Button buttonGET,buttonPost;
CheckBox checkbox1;
LinearLayout ll = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
class clicker implements Button.OnClickListener {
@Override
public void onClick(View v) {
if(v==buttonGET){
checkbox1 = new CheckBox (null);
checkbox1.setText("I'm dynamic!");
ll.addView(checkbox1);
}
if(v==buttonPost){
checkbox1.setText("I'm very dynamic!");
ll.addView(checkbox1);
}
}
}
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ScrollView sv = new ScrollView(this);
//LinearLayout ll = new LinearLayout(this);
ll = new LinearLayout(this);
ll.setOrientation(LinearLayout.VERTICAL);
sv.addView(ll);
buttonGET = new Button(this);
buttonGET.setText("GET");
ll.addView(buttonGET);
buttonGET.setOnClickListener(new clicker());
buttonPost = new Button(this);
buttonPost.setText("POST");
ll.addView(buttonPost);
buttonPost.setOnClickListener(new clicker());
this.setContentView(sv);
}
}
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Dynamiclayout.java
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