Android之使用Bundle进行IPC详解

一、bundle进行ipc介绍

四大组件中的三大组件（activity、service、receiver）都是支持在intent中传递bundle数据的，由于bundle实现了parcelable接口，所以它可以方便地在不同的进程之间传输。当然，传输的数据必须能够被序列化，比如基本类型、实现了parcelable接口的对象、实现了serializable接口的对象以及一些android支持的特殊对象，具体内容可以看bundle这个类，就可以看到所有它支持的类型。bundle不支持的类型无法通过它在进程间传递数据。

二、使用方法

1.打包数据发送

intent intent1 = new intent(mainactivity.this, thirdactivity.class);
bundle bundle = new bundle();
bundle.putcharsequence("name", "zhangmiao");
bundle.putint("age", 20);
intent1.putextras(bundle);
startactivity(intent1); 

2.接受数据

intent intent = getintent();
bundle bundle = intent.getextras();
string name = bundle.getstring("name");
int age = bundle.getint("age"); 

3.在androidmanifest.xml中开启多进程

<activity
  ...
  android:process=":remote" /> 

三、小案例

1.修改activity_main.xml文件

<?xml version="1.0" encoding="utf-8"?>
<linearlayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:fitssystemwindows="true"
  tools:context="com.zhangmiao.ipcdemo.mainactivity"
  android:orientation="vertical"
  >
  <textview
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:text="bundler">
  </textview>

  <button
    android:id="@+id/bundler_button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="send message">
  </button>

</linearlayout> 

2.添加activity_third.xml文件

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical">

  <textview
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:text="at activity third" />

  <textview
    android:id="@+id/textview1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="activity third" />

</linearlayout> 

3.添加thirdactivity类

package com.zhangmiao.ipcdemo;

import android.app.activity;
import android.content.intent;
import android.os.bundle;
import android.widget.textview;

/**
 * created by zhangmiao on 2016/12/27.
 */
public class thirdactivity extends activity {

  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity_third);
    intent intent = getintent();
    bundle bundle = intent.getextras();
    string name = bundle.getstring("name");
    int age = bundle.getint("age");
    textview textview = (textview) findviewbyid(r.id.textview1);
    textview.settext("name:" + name + ",age:" + age);
  }
} 

4.修改mainactivity类

package com.zhangmiao.ipcdemo;

import android.content.componentname;
import android.content.context;
import android.content.intent;
import android.content.serviceconnection;
import android.os.bundle;
import android.os.handler;
import android.os.ibinder;
import android.os.message;
import android.os.messenger;
import android.os.remoteexception;
import android.support.v7.app.appcompatactivity;
import android.util.log;
import android.view.view;
import android.widget.button;
import android.widget.textview;


import java.io.file;
import java.io.fileoutputstream;
import java.io.ioexception;
import java.io.objectoutputstream;
import java.io.serializable;

public class mainactivity extends appcompatactivity {

  private static final string tag = "mainactivity";

  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity_main);

    button button = (button) findviewbyid(r.id.bundler_button);
    button.setonclicklistener(new view.onclicklistener() {
      @override
      public void onclick(view v) {
        intent intent1 = new intent(mainactivity.this, thirdactivity.class);
        bundle bundle = new bundle();
        bundle.putcharsequence("name", "zhangmiao");
        bundle.putint("age", 20);
        intent1.putextras(bundle);
        startactivity(intent1);
      }
    });
  }
} 

5.修改androidmanifest.xml文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.zhangmiao.ipcdemo">

  <uses-permission android:name="android.permission.write_external_storage" />

  <application
    android:allowbackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsrtl="true"
    android:theme="@style/apptheme">
    <activity
      android:name=".mainactivity"
      android:label="@string/app_name"
      android:launchmode="standard"
      android:theme="@style/apptheme.noactionbar">
      <intent-filter>
        <action android:name="android.intent.action.main" />
        <category android:name="android.intent.category.launcher" />
      </intent-filter>
    </activity>
    <activity
      android:name=".thirdactivity"
      android:configchanges="screenlayout"
      android:label="@string/app_name"
      android:process=":remote" />
  </application>
</manifest> 

完整代码下载地址：demo

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。