ex07.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.ex07;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.LayoutInflater;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;

public class ex07 extends Activity implements OnItemClickListener  {
	    /** Called when the activity is first created. */
		private final int WC = ViewGroup.LayoutParams.WRAP_CONTENT; 
		private String[] data = {"Item-1", "Item-2", "Item-3"};
		private TextView tv;
		private String selection = "****";
		
		@Override
	    public void onCreate(Bundle icicle) {
	        super.onCreate(icicle);
	        RelativeLayout r_layout = new RelativeLayout(this);
	        setContentView(r_layout);
	        
	        LayoutInflater inflate = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
	        LinearLayout layout = (LinearLayout)inflate.inflate(R.layout.list, null);
	        
	        RelativeLayout.LayoutParams param
                      = new RelativeLayout.LayoutParams(120, WC);
	        layout.setId(1);
            r_layout.addView(layout, param);
            
	        tv = (TextView)layout.findViewById(R.id.text);
	        ListView lv = (ListView)layout.findViewById(R.id.list);
	        ArrayAdapter<String> adapter = new ArrayAdapter<String>
                 (this, android.R.layout.simple_list_item_1, data);
            lv.setAdapter(adapter);
            lv.setOnItemClickListener(this);
            //------------------------------------------------------
	        Button btn1 = new Button(this);
	        btn1.setId(2);
	        btn1.setText("OK");
	        btn1.setOnClickListener(listener);
	        param = new RelativeLayout.LayoutParams(60, WC);
	        param.addRule(RelativeLayout.RIGHT_OF, 1);
	        param.leftMargin = 15;
	        param.topMargin = 20;
	        r_layout.addView(btn1, param);
            //------------------------------------------------------
	        Button btn2 = new Button(this);
	        btn2.setId(3);
	        btn2.setText("Exit");
	        btn2.setOnClickListener(listener);
	        param = new RelativeLayout.LayoutParams(60, WC);
	        param.addRule(RelativeLayout.BELOW, 2);
	        param.addRule(RelativeLayout.ALIGN_LEFT, 2);
	        param.topMargin = 25;
	        r_layout.addView(btn2, param);
	      }
		 
		 OnClickListener listener = new OnClickListener()
		 {
		 	public void onClick(View v) {
		 		if(v.getId() == 2)
		 		    tv.setText(selection);
		 		else if(v.getId() == 3)
		 			    finish();
		      } 
		   };
		public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
			// TODO Auto-generated method stub
			setTitle(data[arg2]);
			selection = data[arg2];
		}
		
	}