Android剪切板传递对象

需要传递MyData对象

MyData.java

package com.example.android_intent3;

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;
}
@Override
public String toString() {
return "MyData [name=" + name + ", 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;
}

}

新建一个MyData对象，将其转换为字符串

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

}

再将得到的base64String当成字符串传递给另一个activity就可以了。

MainActivity.java

package com.example.android_intent3;

import java.io.ByteArrayOutputStream;
import java.io.ObjectOutputStream;

import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.content.Intent;
import android.util.Base64;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
@SuppressWarnings("deprecation")
public class MainActivity extends Activity {

private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button)findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {

@SuppressLint("NewApi")
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
//简单的通过剪切板传递字符串数据
//				ClipboardManager clipboarmanager = (ClipboardManager)getSystemService(CLIPBOARD_SERVICE);
//				String name = "matrix";
//				clipboarmanager.setPrimaryClip(ClipData.newPlainText("data", name));
//				Intent intent = new Intent(MainActivity.this,OtherActivity.class);
//				startActivity(intent);
//通过剪切板传递对象数据
MyData mydata = new MyData("matrix",21);
//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.setPrimaryClip(ClipData.newPlainText("data", base64String));
Intent intent = new Intent(MainActivity.this,OtherActivity.class);
startActivity(intent);
}
});
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}

OtherActivity.java

package com.example.android_intent3;

import java.io.ByteArrayInputStream;
import java.io.ObjectInputStream;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.os.Bundle;
import android.util.Base64;
import android.widget.TextView;

public class OtherActivity extends Activity {

private TextView textview;
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_other);
textview = (TextView)findViewById(R.id.textview1);
//通过剪切板获取单纯的数据字符串
//		ClipboardManager clipboardManager = (ClipboardManager)getSystemService(Context.CLIPBOARD_SERVICE);
//		ClipData clipData =clipboardManager.getPrimaryClip();
//		String name = clipData.getItemAt(0).getText().toString();
//		textview.setText(name);
//通过剪切板获取对象
ClipboardManager clipboardManager = (ClipboardManager)getSystemService(Context.CLIPBOARD_SERVICE);
ClipData clipData =clipboardManager.getPrimaryClip();
String name = clipData.getItemAt(0).getText().toString();
byte[] base64_byte = Base64.decode(name	, 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
}
}

}

其中 通过获得字符串得到name字符串，再将name转换MyData成对象

byte[] base64_byte = Base64.decode(name , 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

}