使用纯代码的界面程序

package org.crazyit.codeview;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.Button;import android.widget.LinearLayout;import android.widget.TextView;public class CodeView extends Activity {    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);                /*布局*/        LinearLayout layout = new LinearLayout(this);        super.setContentView(layout);        layout.setOrientation(LinearLayout.VERTICAL);                /*TextView控件*/        final TextView show = new TextView(this);        show.setText("显示时间!");                /*Button控件*/        Button bn = new Button(this);            bn.setText("单击我");        bn.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,        ViewGroup.LayoutParams.WRAP_CONTENT             ));                /*添加到布局上*/        layout.addView(show);        layout.addView(bn);                /*对按钮设置事件*/        bn.setOnClickListener(new OnClickListener(){            public void onClick(View v){                show.setText("Hello World"+new java.util.Date());            }        });                //setContentView(R.layout.main);    }}