Android之使用Bundle进行IPC详解
时间：2020-10-20 15:07:57|栏目：Android代码|点击： 次
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
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