Android开发之UI的编程方式创建

package com.example.uicode;

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

public class UICodeActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.main);
        //视图参数
        LayoutParams params =
                new LinearLayout.LayoutParams(
                LayoutParams.FILL_PARENT,
                LayoutParams.WRAP_CONTENT);
        //创建layout
        LinearLayout layout = new LinearLayout(this);
        layout.setOrientation(LinearLayout.VERTICAL);
        //创建TextView视图
        TextView tv = new TextView(this);
        tv.setText("This is a TextView");
        tv.setLayoutParams(params);
        //创建Button视图
        Button button = new Button(this);
        button.setText("This is a Button");
        button.setLayoutParams(params);
        
        //把视图添加到layout中
        layout.addView(tv);
        layout.addView(button);
        
        
        //为layout创建一个参数
        LinearLayout.LayoutParams layoutParams =
                new LinearLayout.LayoutParams(
                        LayoutParams.FILL_PARENT,
                        LayoutParams.WRAP_CONTENT);
        
        this.addContentView(layout, layoutParams);
    }


}