[Android]在代码中创建布局

package com.swufe.layout;

import android.app.Activity;
import android.os.Bundle;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;
import android.widget.TextView;

public class SecondPage extends Activity {
    private LayoutParams lp;
    private LinearLayout ll;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.page_0);
 lp = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
        ll = new LinearLayout(this);
        ll.setOrientation(LinearLayout.VERTICAL);
        
        TextView myTextView = new TextView(this);
        myTextView.setText("Hello!");
        
        ll.addView(myTextView);
        
        this.addContentView(ll,lp);
        
    }
}