【移动应用开发技术】怎么在Android P中实现静默安装

【移动应用开发技术】怎么在AndroidP中实现静默安装

怎么在AndroidP中实现静默安装？针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。Android9.0无法通过以下两种方式实现静默安装：1.runtime执行shellcmd2.PackageInstall反射机制但是Google已经给我们推荐了相关的APIDemos，所以建议大家多看看源码~在frameworks/base/core/java/android/content/pm/PackageInstaller.java有段关于该类的介绍：TheApiDemosprojectcontainsexamplesofusingthisAPI:<code>ApiDemos/src/com/example/android/apis/content/InstallApk*.java</code>./**

*

Offers

the

ability

to

install,

upgrade,

and

remove

applications

on

the

*

device.

This

includes

support

for

apps

packaged

either

as

a

single

*

"monolithic"

APK,

or

apps

packaged

as

multiple

"split"

APKs.

*

<p>

*

An

app

is

delivered

for

installation

through

a

*

{@link

PackageInstaller.Session},

which

any

app

can

create.

Once

the

session

*

is

created,

the

installer

can

stream

one

or

more

APKs

into

place

until

it

*

decides

to

either

commit

or

destroy

the

session.

Committing

may

require

user

*

intervention

to

complete

the

installation.

*

<p>

*

Sessions

can

install

brand

new

apps,

upgrade

existing

apps,

or

add

new

splits

*

into

an

existing

app.

*

<p>

*

Apps

packaged

as

multiple

split

APKs

always

consist

of

a

single

"base"

APK

*

(with

a

{@code

null}

split

name)

and

zero

or

more

"split"

APKs

(with

unique

*

split

names).

Any

subset

of

these

APKs

can

be

installed

together,

as

long

as

*

the

following

constraints

are

met:

*

<ul>

*

<li>All

APKs

must

have

the

exact

same

package

name,

version

code,

and

signing

*

certificates.

*

<li>All

APKs

must

have

unique

split

names.

*

<li>All

installations

must

contain

a

single

base

APK.

*

</ul>

*

<p>

*

###########此处告诉开发者如何调用API安装apk##############

*

The

ApiDemos

project

contains

examples

of

using

this

API:

*

<code>ApiDemos/src/com/example/android/apis/content/InstallApk*.java</code>.

*/

public

class

PackageInstaller翻阅源码，InstallApk*.java相关的一共两个demoInstallApkSessionApi.java//静默安装InstallApk.java//普通安装，调用系统installintent进行安装下面是InstallApkSessionApi.java的具体demopackage

com.example.android.apis.content;

//

Need

the

following

import

to

get

access

to

the

app

resources,

since

this

//

class

is

in

a

sub-package.

import

com.example.android.apis.R;

import

android.app.Activity;

import

android.app.PendingIntent;

import

android.content.Context;

import

android.content.Intent;

import

android.content.IntentSender;

import

android.content.pm.PackageInstaller;

import

android.os.Bundle;

import

android.view.View;

import

android.view.View.OnClickListener;

import

android.widget.Button;

import

android.widget.Toast;

import

java.io.IOException;

import

java.io.InputStream;

import

java.io.OutputStream;

/**

*

Demonstration

of

package

installation

and

uninstallation

using

the

package

installer

Session

*

API.

*

*

@see

InstallApk

for

a

demo

of

the

original

(non-Session)

API.

*/

public

class

InstallApkSessionApi

extends

Activity

{

private

static

final

String

PACKAGE_INSTALLED_ACTION

=

"com.example.android.apis.content.SESSION_API_PACKAGE_INSTALLED";

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.install_apk_session_api);

//

Watch

for

button

clicks.

Button

button

=

(Button)

findViewById(R.id.install);

button.setOnClickListener(new

OnClickListener()

{

public

void

onClick(View

v)

{

PackageInstaller.Session

session

=

null;

try

{

PackageInstaller

packageInstaller

=

getPackageManager().getPackageInstaller();

PackageInstaller.SessionParams

params

=

new

PackageInstaller.SessionParams(

PackageInstaller.SessionParams.MODE_FULL_INSTALL);

int

sessionId

=

packageInstaller.createSession(params);

session

=

packageInstaller.openSession(sessionId);

addApkToInstallSession("HelloActivity.apk",

session);

//

Create

an

install

status

receiver.

Context

context

=

InstallApkSessionApi.this;

Intent

intent

=

new

Intent(context,

InstallApkSessionApi.class);

intent.setAction(PACKAGE_INSTALLED_ACTION);

//此处也可以使用getBoradcast或者getService回调通知

PendingIntent

pendingIntent

=

PendingIntent.getActivity(context,

0,

intent,

0);

IntentSender

statusReceiver

=

pendingIntent.getIntentSender();

//

Commit

the

session

(this

will

start

the

installation

workflow).

mit(statusReceiver);

}

catch

(IOException

e)

{

throw

new

RuntimeException("Couldn't

install

package",

e);

}

catch

(RuntimeException

e)

{

if

(session

!=

null)

{

session.abandon();

}

throw

e;

}

}

});

}

private

void

addApkToInstallSession(String

assetName,

PackageInstaller.Session

session)

throws

IOException

{

//

It's

recommended

to

pass

the

file

size

to

openWrite().

Otherwise

installation

may

fail

//

if

the

disk

is

almost

full.

try

(OutputStream

packageInSession

=

session.openWrite("package",

0,

-1);

InputStream

is

=

getAssets().open(assetName))

{

byte[]

buffer

=

new

byte[16384];

int

n;

while

((n

=

is.read(buffer))

>=

0)

{

packageInSession.write(buffer,

0,

n);

}

}

}

//

Note:

this

Activity

must

run

in

singleTop

launchMode

for

it

to

be

able

to

receive

the

intent

//

in

onNewIntent().

@Override

protected

void

onNewIntent(Intent

intent)

{

Bundle

extras

=

intent.getExtras();

if

(PACKAGE_INSTALLED_ACTION.equals(intent.getAction()))

{

int

status

=

extras.getInt(PackageInstaller.EXTRA_STATUS);

String

message

=

extras.getString(PackageInstaller.EXTRA_STATUS_MESSAGE);

switch

(status)

{

case

PackageInstaller.STATUS_PENDING_USER_ACTION:

//

This

test

app

isn't

privileged,

so

the

user

has

to

confirm

the

install.

Intent

confirmIntent

=

(Intent)

extras.get(Intent.EXTRA_INTENT);

startActivity(confirmIntent);

break;

case

PackageInstaller.STATUS_SUCCESS:

Toast.makeText(this,

"Install

succeeded!",

Toast.LENGTH_SHORT).show();

break;

case

PackageInstaller.STATUS_FAILURE:

case

PackageInstaller.STATUS_FAILURE_ABORTED:

case

PackageInstaller.STATUS_FAILURE_BLOCKED: