Android Provision (OOBE)

源码路径：android/packages/apps/Provision

在Android的原生代码中，Priovision只是一个第一次启动的设置向导，引导用户第一次使用机器设置语言、Wifi等等。

启动顺序：1.Provision ---> launcher ----> 按系统顺序执行流程

Provision在其AndroidManifest.xml中被定义如下：

<?xml version="1.0" encoding="UTF-8"?>

<original-package android:name="com.android.provision" />

<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<application>
<activity android:name="DefaultActivity"
android:excludeFromRecents="true">
<intent-filter android:priority="1">//系统启动后的优先级是1，比launcher还先启动，完成系统第一次设置后启动launcher
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.HOME" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>

Activity DefaultActivity的category被定义成HOME，并且priority为1，是比系统Launcher启动还要早的程序。

Provision中DefaultActivity的实现如下：

[java] view plaincopy

package com.android.provision;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.provider.Settings;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import android.os.Environment;
import android.content.res.AssetManager;
/**
* Application that sets the provisioned bit, like SetupWizard does.
*/
public class DefaultActivity extends Activity {
@Override
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
// Add a persistent setting to allow other apps to know the device has been provisioned.

/*

//要添加的启动代码

*/

//开机后完成设置后，设置这两个标志；设置后才顺序launcher启动，启动整个系统流程
Settings.Global.putInt(getContentResolver(), Settings.Global.DEVICE_PROVISIONED, 1);
Settings.Secure.putInt(getContentResolver(), Settings.Secure.USER_SETUP_COMPLETE, 1);
// remove this activity from the package manager.
PackageManager pm = getPackageManager();
ComponentName name = new ComponentName(this, DefaultActivity.class);
pm.setComponentEnabledSetting(name, PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
PackageManager.DONT_KILL_APP);
// terminate the activity.
finish();
}
}