兼容安卓的javaproject1.0

<pre class="java" name="code">

//兼容安卓的系统package cn.com.likeshow;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

import myvm.test.myActivity;
/*
 * author  张章
 *
 * time 2014-5-12
 *
 */
public class Activity {

	private Bundle bundle;

	//savedInstanceState用于activity见传递參数
	protected void onCreate(Bundle savedInstanceState) {

		this.bundle=savedInstanceState;
	}

	protected Intent getIntent()
	{

		return bundle.getIntent();

	}

	protected static Context getApplicationContext()
	{
		return null;

	}
	protected void startActivity(Intent intent) {
		//通过反射完成对象创建
		Activity activity=intent.getPreActivity();
		Class class1=intent.getAfterActivity();

		 Constructor con=class1.getConstructors()[0];
		 try {
			Activity activity2=(Activity) con.newInstance();
			//把Bundele最为參数传入，调用getIntent()时会从bundle中获取activity间传递的參数
			activity2.onCreate(new Bundle(intent));

		} catch (Exception e) {

			e.printStackTrace();
		}

	}

	protected void setContentView(int id) {
		System.out.println("setContentView " + id);
	}

	protected boolean onCreateOptionsMenu(Menu menu) {

		return true;
	}

	protected boolean onOptionsItemSelected(MenuItem item) {
		return true;
	}

	protected static class Toast
	{

		private Context applicationContext;
		private static String s;
		private int t;

		private Toast(Context applicationContext2, String string, int i) {
			this.applicationContext=applicationContext2;
			this.s=string;
			this.t=i;
		}
		public static Toast makeText(Context applicationContext,String string, int i)
	   {
			 //实际安卓中不一定是返回Toast对象，该事例仅仅用于模拟安卓实现原理
			return new Toast(applicationContext,string,i);
	   }
	   public static void show()
       {
		   int len=s.length()+2;
		   for(int i=0;i<len;i++)
			   System.out.print("*");
			System.out.print("\n*" +s+"*\n");
			 for(int i=0;i<len;i++)
				   System.out.print("*");
			 System.out.println();
	   }
	}

	public static void main(String[] args) {
		//方便起见，假定默认启动myActivity，当然能够通过读取配置文件，知道默认启动的Activity
		new myActivity().onCreate(new Bundle(null));
	}

}

package cn.com.likeshow;

public class Bundle {

	private  Intent intent;
	public Bundle (Intent intent)
	{
		this.intent=intent;
	}
	public Intent getIntent() {
		return intent;
	}
	public void setIntent(Intent intent) {
		this.intent = intent;
	}
}

package cn.com.likeshow;

import java.io.ObjectInputStream.GetField;
import java.util.HashMap;
import java.util.Map;

public class Intent {

	private Map<String ,Object>map;
	private Activity activity;
	private Class class1;
	public Intent(Activity activity, Class<? extends Activity> class1)
	{
		map=new HashMap<String, Object>();
		this.activity=activity;
		this.class1=class1;
	}
	public void putExtra(String str,Object obj){
		map.put(str, obj);
	}
	public Object getExtra(String str){
		return  map.get(str);
	}

	public Activity getPreActivity()
	{
		return activity;

	}
	public Class getAfterActivity()
	{
		return class1;

	}

}

 //==========简易演示样例安卓代码例如以下=========================================================
package myvm.test;

import cn.com.likeshow.Activity;
import cn.com.likeshow.Bundle;
import cn.com.likeshow.Intent;

public class myActivity extends Activity {

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		System.out.println("myActivity 启动");
		setContentView(1);
		Toast.makeText(getApplicationContext(),"哈哈Toast",0).show();

		Intent intent=new Intent(myActivity.this, SecondActivity.class);
		intent.putExtra("myActivity", "hello 2activity");

		startActivity(intent);

		Toast.makeText(getApplicationContext(),"SecondActivity启动完成",0).show();

		Intent intent2=new Intent(myActivity.this, ThirdActivity.class);
		intent2.putExtra("1", "hello 3activity");

		startActivity(intent2);
		Toast.makeText(getApplicationContext(),"ThirdActivity启动完成",0).show();
	}
}

package myvm.test;

import cn.com.likeshow.Activity;
import cn.com.likeshow.Bundle;
import cn.com.likeshow.Intent;

public class SecondActivity extends Activity{
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		System.out.println("SecondActivity 启动");
		setContentView(2);

		Intent intent=getIntent();
		Object object=intent.getExtra("myActivity");
		Object object2=intent.getExtra("1");

		System.out.println("SecondActivity "+object);
		System.out.println("SecondActivity "+object2);
		Toast.makeText(getApplicationContext(),"SecondActivity运行完成",0).show();
	}
}

package myvm.test;

import cn.com.likeshow.Activity;
import cn.com.likeshow.Bundle;
import cn.com.likeshow.Intent;

public class ThirdActivity extends Activity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		System.out.println("ThirdActivity 启动");
		setContentView(3);

		Intent intent=getIntent();
		Object object=intent.getExtra("myActivity");
		Object object2=intent.getExtra("1");

		System.out.println("ThirdActivity "+object);
		System.out.println("ThirdActivity "+object2);
		Toast.makeText(getApplicationContext(),"ThirdActivity运行完成",0).show();
	}
}

==========效果图 =================