3067ce807376001d1a71cc5950778c7a

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.ex01_03;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class ac01 extends Activity {
    /** Called when the activity is first created. */
	 /** Called when the activity is first created. */
	  public static final int PICKUP_ID = Menu.FIRST;
	  public static final int EXIT_ID = Menu.FIRST + 1;
	  static final int PICKUP_REQUEST = 0;
	  @Override
	  public void onCreate(Bundle icicle) {
	        super.onCreate(icicle);
	        setContentView(R.layout.main);
	    }
		@Override
		 public boolean onCreateOptionsMenu(Menu menu) {
		        super.onCreateOptionsMenu(menu);
		        menu.add(0, PICKUP_ID, 0, "Pick Up  An Item");
		        menu.add(1, EXIT_ID, 1, "Exit");
		        return true;
		 }
		 @Override
		    public boolean onOptionsItemSelected(MenuItem item) {
		        switch (item.getItemId()) {
		        case PICKUP_ID:
		           	Intent in = new Intent(ac01.this, pickup.class);
		        	startActivityForResult(in,PICKUP_REQUEST);
		            return true;
		        case EXIT_ID:
	            	 finish();
	            return true;
	        }
		        return super.onOptionsItemSelected(item);
		    }
		 
		 @Override
			protected void onActivityResult(int requestCode, int resultCode, Itent data)
		    {
			        if (requestCode == PICKUP_REQUEST) {
		            if (resultCode == RESULT_CANCELED) 
		                    setTitle("Canceled...");
		                else if(resultCode == RESULT_OK)
		                { 
		                  TextView tv = (TextView)findViewById(R.id.tv);
			              tv.setText("choice: " + data);
		                }
		            }
		    }

	}