ex11.java

Google Android应用框架原理与程序设计 第三版(中文高清PDF)高焕堂

package com.misoo.ex11;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;

public class ex11 extends Activity implements OnCheckedChangeListener {
	    /** Called when the activity is first created. */
	private final int WC = RadioGroup.LayoutParams.WRAP_CONTENT; 
	private final int LWC = LinearLayout.LayoutParams.WRAP_CONTENT; 
	private RadioGroup rg_layout;
	private DrawView dv;
	private LinearLayout layout;
	private int mColor = Color.YELLOW;
	RadioGroup.LayoutParams params;
	LinearLayout.LayoutParams para;
    @Override
    public void onCreate(Bundle icicle) {
	        super.onCreate(icicle);
	        layout = new LinearLayout(this);
	        layout.setOrientation(LinearLayout.VERTICAL);
	        para = new LinearLayout.LayoutParams(230, 140); 
	        dv = new DrawView(this);
	        layout.addView(dv, para);
	        
	        Button btn = new Button(this);
	        btn.setText("Change Color");
	        btn.setOnClickListener(listener);
	        para = new LinearLayout.LayoutParams(LWC, LWC); 
	        layout.addView(btn, para);
	        //-------------------------------------
	        rg_layout = new RadioGroup(this); 
	        params = new RadioGroup.LayoutParams(WC, WC); 
	        rg_layout.setOrientation(RadioGroup.VERTICAL);
	        rg_layout.setLayoutParams(params); 
	        rg_layout.setOnCheckedChangeListener(this);

	        RadioButton button1 = new RadioButton(this); 
	        button1.setText("Yellow");
	        button1.setId(1001);
	        params = new RadioGroup.LayoutParams(WC, WC); 
	        rg_layout.addView(button1,params); 

	        RadioButton button2 = new RadioButton(this); 
	        button2.setText("Blue"); 
	        button2.setId(1002);
	        params = new RadioGroup.LayoutParams(WC, WC); 
	        rg_layout.addView(button2,params); 
	        setContentView(layout); 
	     }
	    public int getColor()
	    {
	    	return mColor;
	    }
	    
	    private OnClickListener listener = new OnClickListener()
		 {
		 	public void onClick(View v) {
		 		setContentView(rg_layout);     
		      } 
		   };
		public void onCheckedChanged(RadioGroup arg0, int arg1) {
			// TODO Auto-generated method stub
			    if(arg0.getCheckedRadioButtonId() == 1001)
			    	mColor = Color.YELLOW;
			    else
			    	mColor = Color.BLUE;
			    setContentView(layout); 
		}    
		}