?在Activity之间数据传递还可以利用一些技巧，不管是Windows还是Linux操作系统，都会支持一种叫剪切板的技术，也就是某一个程序将一些数据复制到剪切板上，然后其他的任何程序都可以从剪切板中获取数据。
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?案例一
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package com.android.myintent;import java.io.ByteArrayOutputStream;import java.io.ObjectOutputStream;import java.net.ContentHandler;import android.R.color;import android.R.integer;import android.app.Activity;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.text.ClipboardManager;import android.util.Base64;import android.view.View;import android.widget.Button;public class Main extends Activity { /** Called when the activity is first created. */ private Button button; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); button = (Button) this.findViewById(R.id.button); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub // 从android系统中调用剪切板的服务// ClipboardManager clipboardManager = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);// String name = "jack";// clipboardManager.setText(name);// Intent intent = new Intent(Main.this, OtherActivity.class);// startActivity(intent); MyData myData = new MyData("jack", 23); //将对象转换成字符串 ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); String base64String = ""; try { ObjectOutputStream objectOutputStream = new ObjectOutputStream(byteArrayOutputStream); objectOutputStream.writeObject(myData); base64String = Base64.encodeToString(byteArrayOutputStream.toByteArray(), Base64.DEFAULT); objectOutputStream.close(); } catch (Exception e) { // TODO: handle exception } ClipboardManager clipboardManager = (ClipboardManager)getSystemService(Context.CLIPBOARD_SERVICE); clipboardManager.setText(base64String); Intent intent =new Intent(Main.this,OtherActivity.class); startActivity(intent); } }); }}?
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package com.android.myintent;import java.io.ByteArrayInputStream;import java.io.ObjectInputStream;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.text.ClipboardManager;import android.util.Base64;import android.widget.TextView;public class OtherActivity extends Activity { private TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.other); textView = (TextView) this.findViewById(R.id.msg); ClipboardManager clipboardManager = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE); String msgString = clipboardManager.getText().toString(); byte[] base64_byte = Base64.decode(msgString, Base64.DEFAULT); ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream( base64_byte); try { ObjectInputStream objectInputStream = new ObjectInputStream( byteArrayInputStream); MyData myData = (MyData) objectInputStream.readObject(); textView.setText(myData.toString()); } catch (Exception e) { // TODO: handle exception } }}? ?
package com.android.myintent;import java.io.Serializable;public class MyData implements Serializable { private String name; private int age; public MyData(String name, int age) { super(); this.name = name; this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } @Override public String toString() { return "MyData [name=" + name + ", age=" + age + "]"; }}?