学步园

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		FrameLayout layout= new FrameLayout(this);//定义框架布局器
		FrameLayout.LayoutParams params=new FrameLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, 
				ViewGroup.LayoutParams.FILL_PARENT);//定义框架布局器参数
		FrameLayout.LayoutParams tparams=new FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 
				ViewGroup.LayoutParams.WRAP_CONTENT);//定义显示组件参数
		TextView txtview = new TextView(this);//定义组件
		txtview.setText("欢迎使用框架布局");
		EditText et = new EditText(this);
		et.setText("请选择你喜欢的布局");
		Button but=new Button(this);
		but.setText("按我");
		layout.addView(txtview, tparams);//添加组件
		layout.addView(et, tparams);
		layout.addView(but, tparams);
		
		
		setContentView(layout,params);//向屏幕上添加布局显示器
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}