Android 数据传递-通过剪切板传递数据

Ø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。

 

Ø案例一

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);
			}
		});
	}
}

   

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 + "]";
	}

}