Android使用编码方式编写界面

package com.feidaochuanqing.uibycode;

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

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       
        LinearLayout layout = new LinearLayout(this);
          
        LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
          ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT);
       
        TextView textView = new TextView(this);
        textView.setWidth(ViewGroup.LayoutParams.FILL_PARENT);
        textView.setHeight(ViewGroup.LayoutParams.FILL_PARENT);
        textView.setText("文本文件");
        textView.setId(22);
       
        //添加的时候注意协商布局参数
        layout.addView(textView,layoutParams);
       
        //这里原来指向的是资源id，现在改为自定义的控件
        setContentView(layout,layoutParams);
       
    }
}