DYNAMIC BUTTON IN ANDROID

10.DYNAMIC BUTTON

So far we have been using button by adding them in xml then binding it with button in activities. But times may come when we need to add them dynamically. In such cases we define them, buttons, in activities and add them to layouts as shown below

package a.b.c; import android.app.Activity; import android.graphics.Typeface; import android.os.Bundle; import android.view.View; import android.view.ViewGroup.LayoutParams; import android.widget.Button; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.LinearLayout; import android.widget.ScrollView; import android.widget.Toast; public class DynamicbuttonActivity extends Activity {       Button b;       ScrollView scrollview;     /** Called when the activity is first created. */     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);                 scrollview = new ScrollView(this);         LinearLayout linearlayout = new LinearLayout(this);         linearlayout.setOrientation(LinearLayout.VERTICAL);         scrollview.addView(linearlayout);                 for(int i = 0; i<15;i++)         {             LinearLayout linear1 = new LinearLayout(this);             linear1.setOrientation(LinearLayout.HORIZONTAL);             linearlayout.addView(linear1);             b = new Button(this);             b.setText("Button no "+i);             b.setId(i);             b.setTextSize(10);             b.setPadding(8, 3, 8, 3);             b.setTypeface(Typeface.SERIF,Typeface.BOLD_ITALIC);             b.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));                         linear1.addView(b);                         CheckBox checkbox = new CheckBox(this);             checkbox.setId(i);             checkbox.setText("Wow..");             linear1.addView(checkbox);                         checkbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {                                                 @Override                         public void onCheckedChanged(CompoundButton arg0, boolean arg1) {                               // TODO Auto-generated method stub                               Toast.makeText(getApplicationContext(), "Checked.."+ arg0.getId(), Toast.LENGTH_SHORT).show();                         }                   });                         b.setOnClickListener(new View.OnClickListener() {                                                 @Override                         public void onClick(View v) {                               // TODO Auto-generated method stub                               Toast.makeText(getApplicationContext(), "Yipee.."+ v.getId(), Toast.LENGTH_SHORT).show();                         }                   });         }         this.setContentView(scrollview);     } }