andriod 多个Activity之间共享数据

在项目中要在多个Activity之间共享数据，刚开始想了多种方法，但是都失败了，通过查找资料，Android提供了一个叫Application的共享数据很合适，下面就贴出代码。

写一个继承Application的数据模型

package cn.edu.cqu.bluetooth.dao;import android.app.Application;public class Bluetooth extends Application{String mDeviceAddress;String mDeviceName;String phoneMac;public String getPhoneMac() {return phoneMac;}public void setPhoneMac(String phoneMac) {this.phoneMac = phoneMac;}public String getmDeviceAddress() {return mDeviceAddress;}public void setmDeviceAddress(String mDeviceAddress) {this.mDeviceAddress = mDeviceAddress;}public String getmDeviceName() {return mDeviceName;}public void setmDeviceName(String mDeviceName) {this.mDeviceName = mDeviceName;}
}

下面就是写入数据。

 Bluetooth bluetooth = (Bluetooth) getApplicationContext();bluetooth.setPhoneMac(phoneMac);bluetooth.setmDeviceAddress(device.getAddress());bluetooth.setmDeviceName(device.getName());

Bluetooth bluetooth = (Bluetooth) getApplicationContext();System.out.println("bluetooth---" + bluetooth);mDeviceName = bluetooth.getmDeviceName();mDeviceAddress = bluetooth.getmDeviceAddress();phoneMac = bluetooth.getPhoneMac();

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