ANDROID_MARS学习笔记_S01原始版_018_SERVICE之Parcel

一、代码

1.xml
(1)activity_main.xml

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.parcel.MainActivity" >

    <Button
        android:id="@+id/saveDataBtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="放数据" />
    <Button
        android:id="@+id/getDataBtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="取数据" 
        android:layout_below="@id/saveDataBtn"/>

</RelativeLayout>

(2)AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.parcel"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="21" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

2.java
(1)MainActivity.java

package com.parcel;

import android.app.Activity;
import android.os.Bundle;
import android.os.Parcel;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

    private Button getDataBtn,saveDataBtn;
    private Parcel parcel = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        parcel = Parcel.obtain();
        saveDataBtn = (Button) findViewById(R.id.saveDataBtn);
        getDataBtn = (Button) findViewById(R.id.getDataBtn);
        saveDataBtn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                parcel.writeString("testparcel");
                parcel.writeInt(666);
                parcel.writeFloat(0.999F);
            }
        });
        
        getDataBtn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                parcel.setDataPosition(0);//把指针移到最前面
                String str = parcel.readString();
                int i = parcel.readInt();
                float f= parcel.readFloat();
                System.out.println(str);
                System.out.println(i);
                System.out.println(f);
            }
        });
    }
}