17-Dynamic UI (RelativeLayout)

public class MainActivity extends AppCompatActivity {
int b1Id=100;
int b2Id=101;
int b3Id=102;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
RelativeLayout myRelative=new RelativeLayout(this);

Display display=getWindowManager().getDefaultDisplay();
Point displaySize=new Point();
display.getSize(displaySize);


Button b1=new Button(this);
b1.setText("Button 1");
b1.setId(b1Id);
RelativeLayout.LayoutParams b1Layout=new RelativeLayout.LayoutParams(displaySize.x/2, displaySize.y/2);
b1Layout.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
b1.setLayoutParams(b1Layout);



Button b2=new Button(this);
b2.setText("Button 2");
b2.setId(b2Id);
Button b3=new Button(this);
b3.setText("Button 3");
b3.setId(b3Id);
myRelative.addView(b1);
RelativeLayout.LayoutParams b2Layout=new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
b2Layout.addRule(RelativeLayout.BELOW, b1Id);
myRelative.addView(b2, b2Layout);
RelativeLayout.LayoutParams b3Layout=new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
b3Layout.addRule(RelativeLayout.BELOW, b1Id);
b3Layout.addRule(RelativeLayout.RIGHT_OF, b2Id);
myRelative.addView(b3, b3Layout);

Button b4=new Button(this);
b4.setText("Button 4");
RelativeLayout.LayoutParams b4Layout=new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
b4Layout.addRule(RelativeLayout.BELOW, b2.getId());
myRelative.addView(b4, b4Layout);


Button b5=new Button(this);
b5.setText("Button 5");
RelativeLayout.LayoutParams b5Layout=new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
b5Layout.addRule(RelativeLayout.BELOW, b2.getId());
b5Layout.addRule(RelativeLayout.RIGHT_OF, b2.getId());
myRelative.addView(b5, b5Layout);


Button b6=new Button(this);
b6.setText("Button 6");
RelativeLayout.LayoutParams b6Layout=new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
b6Layout.addRule(RelativeLayout.BELOW, b2.getId());
b6Layout.addRule(RelativeLayout.RIGHT_OF, b3.getId());
b6.setLayoutParams(b6Layout);
myRelative.addView(b6);
setContentView(myRelative);

}
}