安卓APP实现在线更新功能，适配Androidx和9

installApk();//下载成功 打开安装界面

stopSelf();//结束服务

sendBroadcast(new Intent().setAction(“android.intent.action.loading_over”));//发送下载结束的广播

}

@Override

public void onFailure(HttpException arg0, String arg1) {

Toast.makeText(LoadingService.this,“下载失败…”,Toast.LENGTH_SHORT).show();

sendBroadcast(new Intent().setAction(“android.intent.action.loading_over”));//发送下载结束的广播

nm.cancel(R.layout.notification_item);

stopSelf();

}

});

}

/**

• 安装下载的新版本

*/

protected void installApk() {

Intent intent = new Intent(Intent.ACTION_VIEW);

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

File file = new File(path);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {

// 7.0 以上

try {

Uri apkUri = FileProvider.getUriForFile(this, “com.jw.fileprovider”, file);

intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);

intent.setDataAndType(apkUri, “application/vnd.android.package-archive”);

}catch (Exception e){

}

} else {

// 7.0以下

Uri uri = Uri.fromFile(file);

intent.setDataAndType(uri, “application/vnd.android.package-archive”);

}

this.startActivity(intent);

}

private void createNotification(final long total, final long current){

NotificationCompat.Builder builder = new NotificationCompat.Builder(this,“default”);

builder.setSmallIcon(R.mipmap.ic_launcher)//必须要设置这个属性，否则不显示

;

RemoteViews contentView = new RemoteViews(this.getPackageName(),R.layout.notification_item);

contentView.setProgressBar(R.id.progress, (int)total, (int)current, false);

builder.setOngoing(true);//设置左右滑动不能删除

// Notification notification = builder.build();

// notification.contentView = contentView;

String id = “channel_001”;

String name = “name”;

Notification notification = null;

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {

NotificationChannel mChannel = new NotificationChannel(id, name, NotificationManager.IMPORTANCE_LOW);

nm.createNotificationChannel(mChannel);

notification = new Notification.Builder(LoadingService.this,“default”)

.setChannelId(id)

.setContentTitle(“客户端更新”)

.setContentText(“更新完毕”)

.setSmallIcon(R.mipmap.ic_launcher).build();

notification.contentView = contentView;

} else {

NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(LoadingService.this,“default”)

.setContentTitle(“更新了”)

.setContentText(“更新了xxxxxxxxx内容”)

.setSmallIcon(R.mipmap.ic_launcher)

.setOngoing(true)

;//无效

notification = notificationBuilder.build();

notification.contentView = contentView;

}

nm.notify(R.layout.notification_item,notification);//发送通知

}

}

Utils.java

import android.content.Context;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

public class Utils {

/**

• 获取版本号

• @throws PackageManager.NameNotFoundException

*/

public static String getVersionName(Context context) throws PackageManager.NameNotFoundException {

// 获取packagemanager的实例

PackageManager packageManager = context.getPackageManager();

// getPackageName()是你当前类的包名，0代表是获取版本信息

PackageInfo packInfo = packageManager.getPackageInfo(context.getPackageName(), 0);

String version = packInfo.versionName;

return version;

}

/**

• 版本号比较

*0代表相等，1代表version1大于version2，-1代表version1小于version2

• @param version1

• @param version2

• @return

*/

public static int compareVersion(String version1, String version2) {

if (version1.equals(version2)) {

return 0;

}

String[] version1Array = version1.split(“\.”);

String[] version2Array = version2.split(“\.”);

int index = 0;

// 获取最小长度值

int minLen = Math.min(version1Array.length, version2Array.length);

int diff = 0;

// 循环判断每位的大小

while (index < minLen

&& (diff = Integer.parseInt(version1Array[index])

• Integer.parseInt(version2Array[index])) == 0) {

index++;

}

if (diff == 0) {

// 如果位数不一致，比较多余位数

for (int i = index; i < version1Array.length; i++) {

if (Integer.parseInt(version1Array[i]) > 0) {

return 1;

}

}

for (int i = index; i < version2Array.length; i++) {

if (Integer.parseInt(version2Array[i]) > 0) {

return -1;

}

}

return 0;

} else {

return diff > 0 ? 1 : -1;

}

}

}

VersionInfoBean.java

public class VersionInfoBean {

private String versionName;

private String downloadUrl;

private String desc;

private String path;

public VersionInfoBean(String versionName, String downloadUrl, String desc, String path) {

this.versionName = versionName;

this.downloadUrl = downloadUrl;

this.desc = desc;

this.path = path;

}

public String getPath() {

return path;

}

public void setPath(String path) {

this.path = path;

}

public String getVersionName() {

return versionName;

}

public void setVersionName(String versionName) {

this.versionName = versionName;

}

public String getDownloadUrl() {

return downloadUrl;

}

public void setDownloadUrl(String downloadUrl) {

this.downloadUrl = downloadUrl;

}

public String getDesc() {

return desc;

}

public void setDesc(String desc) {

this.desc = desc;

}

public VersionInfoBean(String versionName, String downloadUrl, String desc) {

this.versionName = versionName;

this.downloadUrl = downloadUrl;

this.desc = desc;

}

}

layout下的xml

activity_update.xml

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

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android=“http://schemas.android.com/apk/res/android”

xmlns:app=“http://schemas.android.com/apk/res-auto”

xmlns:tools=“http://schemas.android.com/tools”

android:layout_width=“match_parent”

android:layout_height=“match_parent”

tools:context=“.Activities.UpdateActivity”>

<Button

android:id=“@+id/btn_refresh”

android:layout_width=“wrap_content”

android:layout_height=“wrap_content”

android:text=“版本更新”

app:layout_constraintBottom_toBottomOf=“parent”

app:layout_constraintLeft_toLeftOf=“parent”

app:layout_constraintRight_toRightOf=“parent”

app:layout_constraintTop_toTopOf=“parent” />

</androidx.constraintlayout.widget.ConstraintLayout>

version_update.xml

<?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=“wrap_content”

android:orientation=“vertical”>

<TextView

android:id=“@+id/title”

android:layout_width=“match_parent”

android:layout_height=“50dp”

android:gravity=“center_vertical|center_horizontal”

android:paddingLeft=“10dp”

android:text=“更新提示”

android:textColor=“#000000”

android:textSize=“18sp” />

<TextView

android:layout_width=“match_parent”

android:layout_height=“1dp”

android:background=“#000000” />

<TextView

android:layout_marginTop=“10dp”

android:id=“@+id/version”

android:layout_width=“match_parent”

android:layout_height=“wrap_content”

android:paddingLeft=“12dp”

android:paddingRight=“10dp”

android:text=“content”

android:textSize=“16sp” />

<TextView

android:layout_marginTop=“14dp”

android:id=“@+id/content”

android:layout_width=“match_parent”

android:layout_height=“wrap_content”

android:paddingLeft=“12dp”

android:paddingRight=“10dp”

android:text=“content”

android:textSize=“14sp” />

<TextView

android:layout_marginTop=“10dp”

android:layout_width=“match_parent”

android:layout_height=“1dp”

android:background=“#f0f0f0” />

<LinearLayout

android:layout_marginTop=“4dp”

android:layout_width=“match_parent”

android:layout_height=“45dp”

android:orientation=“horizontal”

android:paddingLeft=“10dp”

android:paddingRight=“10dp”>

<Button

android:textColor=“#000000”

android:id=“@+id/left”

android:layout_width=“0dp”

android:layout_height=“match_parent”

android:layout_weight=“1”

android:background=“@null”

android:gravity=“center_vertical|center_horizontal”

android:text=“取消”

android:textSize=“16sp”

/>

<TextView

android:textColor=“#f0f0f0”

android:id=“@+id/line”

android:layout_width=“1dp”

android:layout_height=“match_parent”

android:layout_centerHorizontal=“true”

/>

<Button

android:textColor=“#d90c0c”

android:id=“@+id/right”

android:layout_width=“0dp”

android:layout_height=“match_parent”

android:layout_alignParentRight=“true”

android:layout_weight=“1”

android:background=“@null”

android:gravity=“center_vertical|center_horizontal”

android:text=“更新”

android:textSize=“16sp”

/>

notification_item.xml

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

<LinearLayout xmlns:android=“http://schemas.android.com/apk/res/android”

android:orientation=“horizontal” android:layout_width=“match_parent”

android:paddingTop=“8dp”

android:layout_height=“wrap_content”>

<ImageView

android:src=“@mipmap/ic_launcher”

android:layout_width=“wrap_content”

android:layout_height=“wrap_content” />

<LinearLayout

android:layout_marginRight=“6dp”

android:layout_marginLeft=“8dp”

android:layout_gravity=“center_vertical”

android:orientation=“vertical”

android:layout_width=“match_parent”

android:layout_height=“wrap_content”>

<TextView

android:textSize=“14sp”

android:text=“正在下载”

android:layout_width=“wrap_content”

android:layout_height=“wrap_content” />

<ProgressBar

android:layout_marginTop=“4dp”

style=“?android:attr/progressBarStyleHorizontal”

android:id=“@+id/progress”

android:layout_width=“match_parent”

android:layout_height=“wrap_content” />

在res新建一个xml文件夹

在xml文件夹里新建资源文件update_apk_paths.xml

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

在xml文件夹里新建资源文件network_security_config.xml

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

添加的依赖：xUtils-2.6.14.jar 提取码：p5q3

implementation fileTree(include: [‘*.jar’], dir: ‘libs’)

implementation ‘androidx.core:core:1.3.0’

implementation ‘androidx.constraintlayout:constraintlayout:1.1.3’

testImplementation ‘junit:junit:4.12’

implementation ‘androidx.appcompat:appcompat:1.1.0’

implementation files(‘libs/xUtils-2.6.14.jar’)

androidTestImplementation(‘androidx.test.espresso:espresso-core:3.1.0’, {

exclude group: ‘com.android.support’, module: ‘support-annotations’

})

manifest清单

1.在<manifest > ...</manifest> 里面加上权限：

2.在 <application> ... </application>里面加上：

android:networkSecurityConfig=“@xml/network_security_config”

<uses-library

android:name=“org.apache.http.legacy”

android:required=“false”

/>

<activity android:name=“.Activities.UpdateActivity”

tools:ignore=“InnerclassSeparator”>

<service

android:name=“.Updates.LoadingService”

android:process=“system”

tools:ignore=“InnerclassSeparator” />

<provider

android:name=“androidx.core.content.FileProvider”

android:authorities=“com.jw.fileprovider”

android:exported=“false”

android:grantUriPermissions=“true”>

<meta-data

android:name=“android.support.FILE_PROVIDER_PATHS”

android:resource=“@xml/update_apk_paths” />

（2）Tomcat的配置：

---

<?xml version='1.0' encoding='utf-8'?>

<Resource name=“UserDatabase” auth=“Container”

type=“org.apache.catalina.UserDatabase”

description=“User database that can be updated and saved”

factory=“org.apache.catalina.users.MemoryUserDatabaseFactory”

pathname=“conf/tomcat-users.xml” />

<Connector port=“8083” protocol=“HTTP/1.1”

connectionTimeout=“20000”

redirectPort=“443” />

<Connector port=“443” protocol=“org.apache.coyote.http11.Http11Protocol”

maxThreads=“150” SSLEnabled=“true” scheme=“https” secure=“true”

clientAuth=“false” sslProtocol=“TLS” />

<Realm className=“org.apache.catalina.realm.UserDatabaseRealm”

resourceName=“UserDatabase”/>

<Host name=“localhost” appBase=“webapps”

unpackWARs=“true” autoDeploy=“true”>

<Valve className=“org.apache.catalina.valves.AccessLogValve” directory=“logs”

prefix=“localhost_access_log.” suffix=“.txt”

pattern=“%h %l %u %t “%r” %s %b” />

最后的最后

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ly

available for use by the Realm. -->

<Realm className=“org.apache.catalina.realm.UserDatabaseRealm”

resourceName=“UserDatabase”/>

<Host name=“localhost” appBase=“webapps”

unpackWARs=“true” autoDeploy=“true”>

<Valve className=“org.apache.catalina.valves.AccessLogValve” directory=“logs”

prefix=“localhost_access_log.” suffix=“.txt”

pattern=“%h %l %u %t “%r” %s %b” />

最后的最后

对于程序员来说，要学习的知识内容、技术有太多太多，要想不被环境淘汰就只有不断提升自己，从来都是我们去适应环境，而不是环境来适应我们！

当你有了学习线路，学习哪些内容，也知道以后的路怎么走了，理论看多了总要实践的

[外链图片转存中…(img-mhJfwGWk-1715056009504)]

最后，互联网不存在所谓的寒冬，只是你没有努力罢了！
《Android学习笔记总结+移动架构视频+大厂面试真题+项目实战源码》，点击传送门，即可获取！