最近业务有涉及到，奈何是个app代码小白，遂记录一下
一：AndroidManifest.xml文件配置
application标签里面加上
android:networkSecurityConfig="@xml/network_config"
<!-- app下载更新配置-->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<!-- 在SDCard中创建与删除文件权限 -->
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" tools:ignore="ProtectedPermissions" />
<!-- 存储权限 -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<!-- 安装APK权限 -->
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
<!-- 将以下 <provider> 标签移动到 <application> 标签内部 -->
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="com.shuye.znsy.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths" />
</provider>二：file_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<!--安装包文件存储路径-->
<external-files-path
name="my_download"
path="Download" />
<external-path
name="."
path="." />
</paths>三：network_config.xml文件
<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
<base-config cleartextTrafficPermitted="true" />
</network-security-config>
如果没有这两个文件需要新建然后将以上美容复制进去
四：progress.xml滚动条布局
<?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">
<LinearLayout
android:id="@+id/titleBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/txtStatus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="状态"
android:textSize="10sp"
android:textStyle="normal" />
<ProgressBar
android:id="@+id/progress"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_toLeftOf="@id/txtStatus" />
</LinearLayout>
</LinearLayout>五：新建AutoUpdater.java 这里是核心
package com.shuye.znsy.update;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.os.Handler;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import androidx.core.content.FileProvider;
import com.shuye.znsy.BuildConfig;
import com.shuye.znsy.R;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
public class AutoUpdater {
// 下载安装包的网络路径
private String apkUrl = BuildConfig.host + "app/upload/download-apk";
protected String checkUrl = apkUrl + "/output-metadata-json";
// 保存APK的文件名
private static final String saveFileName = "my.apk";
private static File apkFile;
// 下载线程
private Thread downLoadThread;
private int progress;// 当前进度
// 应用程序Context
private Context mContext;
// 是否是最新的应用,默认为false
private boolean isNew = false;
private boolean intercept = false;
// 进度条与通知UI刷新的handler和msg常量
private ProgressBar mProgress;
private TextView txtStatus;
private static final int DOWN_UPDATE = 1;
private static final int DOWN_OVER = 2;
private static final int SHOWDOWN = 3;
public AutoUpdater(Context context) {
mContext = context;
apkFile = new File(mContext.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS), saveFileName);
}
public void ShowUpdateDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
builder.setTitle("软件版本更新");
builder.setMessage("有最新的软件包，请下载并安装!");
builder.setPositiveButton("立即下载", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
ShowDownloadDialog();
}
});
//按钮隐藏，只能下载更新
// builder.setNegativeButton("以后再说", new DialogInterface.OnClickListener() {
// @Override
// public void onClick(DialogInterface dialog, int which) {
// dialog.dismiss();
// }
// });
AlertDialog dialog = builder.create();
dialog.setOnShowListener(new DialogInterface.OnShowListener() {
@Override
public void onShow(DialogInterface dialogInterface) {
Button btnPos = dialog.getButton(DialogInterface.BUTTON_POSITIVE);
Button btnNeg = dialog.getButton(DialogInterface.BUTTON_NEGATIVE);
if (btnPos != null) {
btnPos.setTextColor(Color.WHITE);
}
if (btnNeg != null) {
btnNeg.setTextColor(Color.WHITE);
}
}
});
// 设置点击空白区域不关闭对话框
dialog.setCanceledOnTouchOutside(false);
//这里设置点击返回按钮对话框不消失
dialog.setOnKeyListener(new DialogInterface.OnKeyListener() {
@Override
public boolean onKey(DialogInterface dialogInterface, int keyCode, KeyEvent keyEvent) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
// 拦截返回按钮事件，不做任何操作
return true;
}
return false;
}
});
dialog.show();
}
private void ShowDownloadDialog() {
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(mContext);
dialogBuilder.setTitle("软件版本更新");
LayoutInflater inflater = LayoutInflater.from(mContext);
View v = inflater.inflate(R.layout.progress, null);
mProgress = (ProgressBar) v.findViewById(R.id.progress);
txtStatus = v.findViewById(R.id.txtStatus);
dialogBuilder.setView(v);
dialogBuilder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
intercept = true;
}
});
AlertDialog dialog = dialogBuilder.create();
dialog.setOnShowListener(new DialogInterface.OnShowListener() {
@Override
public void onShow(DialogInterface dialogInterface) {
Button btnNeg = dialog.getButton(DialogInterface.BUTTON_NEGATIVE);
if (btnNeg != null) {
btnNeg.setTextColor(Color.WHITE);
}
}
});
// 设置点击空白区域不关闭对话框
dialog.setCanceledOnTouchOutside(false);
//这里设置点击返回按钮对话框不消失
dialog.setOnKeyListener(new DialogInterface.OnKeyListener() {
@Override
public boolean onKey(DialogInterface dialogInterface, int keyCode, KeyEvent keyEvent) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
// 拦截返回按钮事件，不做任何操作
return true;
}
return false;
}
});
dialog.show();
DownloadApk();
}
/**
* 检查是否更新的内容
*/
public void CheckUpdate() {
new Thread(new Runnable() {
@Override
public void run() {
try {
String localVersion = "1";
try {
localVersion = mContext.getPackageManager().getPackageInfo(mContext.getPackageName(), 0).versionName;
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
String versionName = "1";
String outputFile = "";
String config = doGet(checkUrl);
if (config != null && config.length() > 0) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
Matcher m = Pattern.compile("\"outputFile\":\\s*\"(?<m>[^\"]*?)\"").matcher(config);
if (m.find()) {
outputFile = m.group("m");
}
m = Pattern.compile("\"versionName\":\\s*\"(?<m>[^\"]*?)\"").matcher(config);
if (m.find()) {
String v = m.group("m");
versionName = m.group("m").replace("v1.0.", "");
}
}
}
if (localVersion.contains(".")) {
localVersion = localVersion.substring(0, localVersion.indexOf("."));
}
if (versionName.contains(".")) {
versionName = versionName.substring(0, versionName.indexOf("."));
}
//测试环境 大于号 正式上线要改成小于号,<<<<<<<<<<<<<<<<<<<<<<
if (Long.parseLong(localVersion) > Long.parseLong(versionName)) {
// apkUrl = apkUrl + outputFile;
mHandler.post(new Runnable() {
@Override
public void run() {
System.out.println("版本升级开始自动更新--------------------" + apkUrl);
mHandler.sendEmptyMessage(SHOWDOWN);
}
});
} else {
// 当前版本已是最新版本
return;
}
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
}
/**
* 从服务器下载APK安装包
*/
public void DownloadApk() {
downLoadThread = new Thread(DownApkWork);
downLoadThread.start();
}
private Runnable DownApkWork = new Runnable() {
@Override
public void run() {
URL url;
try {
url = new URL(apkUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.connect();
int length = conn.getContentLength();
InputStream ins = conn.getInputStream();
FileOutputStream fos = new FileOutputStream(apkFile);
int count = 0;
byte[] buf = new byte[1024];
while (!intercept) {
int numread = ins.read(buf);
count += numread;
progress = (int) (((float) count / length) * 100);
// 下载进度
mHandler.sendEmptyMessage(DOWN_UPDATE);
if (numread <= 0) {
// 下载完成通知安装
mHandler.sendEmptyMessage(DOWN_OVER);
break;
}
fos.write(buf, 0, numread);
}
fos.close();
ins.close();
} catch (Exception e) {
e.printStackTrace();
}
}
};
/**
* 安装APK内容
*/
public void installAPK() {
try {
if (!apkFile.exists()) {
return;
}
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);//安装完成后打开新版本
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); // 给目标应用一个临时授权
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {//判断版本大于等于7.0
//如果SDK版本>=24，即：Build.VERSION.SDK_INT >= 24，使用FileProvider兼容安装apk
String packageName = mContext.getApplicationContext().getPackageName();
String authority = new StringBuilder(packageName).append(".fileprovider").toString();
Uri apkUri = FileProvider.getUriForFile(mContext, authority, apkFile);
intent.setDataAndType(apkUri, "application/vnd.android.package-archive");
} else {
intent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive");
}
// 添加权限请求
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
mContext.startActivity(intent);
android.os.Process.killProcess(android.os.Process.myPid());//安装完之后会提示”完成” “打开”。
} catch (Exception e) {
e.printStackTrace();
// 添加异常处理，打印异常信息或者显示Toast提示
Toast.makeText(mContext, "安装APK出错", Toast.LENGTH_SHORT).show();
}
}
private Handler mHandler = new Handler() {
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case SHOWDOWN:
ShowUpdateDialog();
break;
case DOWN_UPDATE:
txtStatus.setText(progress + "%");
mProgress.setProgress(progress);
break;
case DOWN_OVER:
Toast.makeText(mContext, "下载完毕", Toast.LENGTH_SHORT).show();
installAPK();
break;
default:
break;
}
}
};
public static String doGet(String httpurl) {
HttpURLConnection connection = null;
InputStream is = null;
BufferedReader br = null;
String result = null;
try {
URL url = new URL(httpurl);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setConnectTimeout(15000);
connection.setReadTimeout(60000);
connection.connect();
if (connection.getResponseCode() == 200) {
is = connection.getInputStream();
br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
StringBuffer sbf = new StringBuffer();
String temp = null;
while ((temp = br.readLine()) != null) {
sbf.append(temp);
sbf.append("\r\n");
}
result = sbf.toString();
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (null != br) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (null != is) {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
connection.disconnect();
}
return result;
}
}六：MainActivity.java
/**
* app检查更新
*/
private void appUpdata(){
//检查更新
try {
//6.0才用动态权限
if (Build.VERSION.SDK_INT >= 23) {
String[] permissions = {
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE,
Manifest.permission.ACCESS_WIFI_STATE,
Manifest.permission.INTERNET};
List<String> permissionList = new ArrayList<>();
for (int i = 0; i < permissions.length; i++) {
if (ActivityCompat.checkSelfPermission(this, permissions[i]) != PackageManager.PERMISSION_GRANTED) {
permissionList.add(permissions[i]);
}
}
if (permissionList.size() <= 0) {
//说明权限都已经通过，可以做你想做的事情去
//自动更新
AutoUpdater manager = new AutoUpdater(MainActivity.this);
manager.CheckUpdate();
} else {
//存在未允许的权限
ActivityCompat.requestPermissions(this, permissions, 100);
}
}
} catch (Exception ex) {
Toast.makeText(MainActivity.this, "自动更新异常：" + ex.getMessage(), Toast.LENGTH_SHORT).show();
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
boolean haspermission = false;
if (100 == requestCode) {
for (int i = 0; i < grantResults.length; i++) {
if (grantResults[i] == -1) {
haspermission = true;
}
}
if (haspermission) {
//跳转到系统设置权限页面，或者直接关闭页面，不让他继续访问
permissionDialog();
} else {
//全部权限通过，可以进行下一步操作
AutoUpdater manager = new AutoUpdater(MainActivity.this);
manager.CheckUpdate();
}
}
}
AlertDialog alertDialog;
//打开手动设置应用权限
private void permissionDialog() {
if (alertDialog == null) {
alertDialog = new AlertDialog.Builder(this)
.setTitle("提示信息")
.setMessage("当前应用缺少必要权限，该功能暂时无法使用。如若需要，请单击【确定】按钮前往设置中心进行权限授权。")
.setPositiveButton("设置", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
cancelPermissionDialog();
Uri packageURI = Uri.parse("package:" + getPackageName());
Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS, packageURI);
startActivity(intent);
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
cancelPermissionDialog();
}
})
.create();
}
alertDialog.show();
}
private void cancelPermissionDialog() {
alertDialog.cancel();
}
private static final long HEARTBEAT_INTERVAL = 60 * 60 * 1000; // 1小时的毫秒数
// private static final long HEARTBEAT_INTERVAL = 1 * 60 * 1000; // 每隔一分钟的毫秒数
private Handler heartbeatHandler = new Handler();
private Runnable heartbeatRunnable = new Runnable() {
@Override
public void run() {
appUpdata(); // 调用appUpdata()方法
heartbeatHandler.postDelayed(this, HEARTBEAT_INTERVAL); // 每隔1小时再次执行
}
};
private void startHeartbeat() {
heartbeatHandler.postDelayed(heartbeatRunnable, HEARTBEAT_INTERVAL);
}
private void stopHeartbeat() {
heartbeatHandler.removeCallbacks(heartbeatRunnable);
}
}然后在creat里面调用心跳
@Override
protected void onCreate(Bundle savedInstanceState) {
//其他代码省略
startHeartbeat();
}这里要说一下，打包的时候可以根据当前时间设置，修改build.gradle文件
plugins {
id 'com.android.application'
//添加如下配置
id 'com.huawei.agconnect'
}
apply plugin: 'com.huawei.agconnect'
android {
compileSdk 31
defaultConfig {
applicationId "com.shuye.znsy"
minSdk 21
targetSdk 31
versionCode 1
// versionName "1.0"
versionName "${releaseTime()}"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
debug {
signingConfig signingConfigs.debug
debuggable true
minifyEnabled false
buildConfigField("String", "host", "\"http://192.168.100.111:8001/\"")
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
android.applicationVariants.all { variant ->
variant.outputs.all {
outputFileName = "my_${releaseTime()}.apk"
}
}
}
release {
minifyEnabled false
shrinkResources false
zipAlignEnabled true
jniDebuggable false
debuggable false
buildConfigField("String", "host", "\"http://192.168.100.111:8001/\"")
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
android.applicationVariants.all { variant ->
variant.outputs.all {
outputFileName = "my_${releaseTime()}.apk"
}
}
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation 'androidx.appcompat:appcompat:1.3.0'
implementation 'com.google.android.material:material:1.4.0'
implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
// implementation 'androidx.media3:media3-common:+'
testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
implementation 'com.github.Jasonchenlijian:FastBle:2.4.0'
implementation 'com.huawei.hms:scanplus:2.12.0.301'
//数据解析相关
implementation 'com.alibaba:fastjson:1.2.37'
implementation 'io.reactivex:rxjava:1.3.0'
implementation 'io.reactivex:rxandroid:1.2.1'
implementation 'com.google.code.gson:gson:2.8.6'
implementation 'com.orhanobut:logger:2.1.1'
//网络框架
implementation 'com.squareup.retrofit2:retrofit:2.4.0'
implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
implementation 'com.squareup.retrofit2:adapter-rxjava2:2.4.0'
implementation 'io.reactivex.rxjava2:rxandroid:2.0.2'
implementation 'io.reactivex.rxjava2:rxjava:2.1.16'
implementation 'com.squareup.okhttp3:okhttp:3.11.0'
implementation 'com.squareup.okhttp3:logging-interceptor:3.8.1'
//eventbus
implementation 'org.greenrobot:eventbus:3.0.0'
}
def releaseTime() {
return new Date().format("yyyyMMddHHmmss", TimeZone.getTimeZone("UTC"))
}打包后得到的文件
以上是app内所要修改或添加全部代码，注意这里需要配合后端下载文件联合使用，考虑到这里遂上一下后端代码，每个人情况不一样，仅供参考
我这里是springboot框架，java语言
一个为下载文件apk的方法，另外一个读取output-metadata.json反馈到app进行版本解析比较
注意这里我后端已经有了文件上传的方法，我是将apk和output-metadata.json一起上传到了服务器上面
package com.cz.hospital.base.controller.pad;
import com.cz.hospital.base.service.IPackageUploadService;
import com.cz.hospital.base.service.IUserService;
import com.cz.hospital.entity.attachment.AttachmentEntity;
import com.cz.hospital.entity.packageupload.vo.PackageUploadVo;
import io.swagger.annotations.Api;
import lombok.extern.slf4j.Slf4j;
import org.springframework.core.io.UrlResource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
@Slf4j
@RestController
@RequestMapping("/app/upload")
@Api(tags = "app安装包下载管理接口")
public class AppUpdateController {
@Resource
private IPackageUploadService packageUploadService;
@Resource
private IUserService userService;
@RequestMapping("/download-apk")
public ResponseEntity<org.springframework.core.io.Resource> downloadNewestFile() throws IOException {
PackageUploadVo vo = packageUploadService.findNewestList();
List<AttachmentEntity> attachmentList = vo.getAttachmentList();
AttachmentEntity file = new AttachmentEntity();
if( attachmentList.size()>0 ){
if( attachmentList.size()>0 ){
for( AttachmentEntity aeF : attachmentList ){
if( ".apk".equals( aeF.getFileExtension() ) ){
file = aeF;
}
}
}
}
String filePath = file.getFileStoragePath();
String fileName = file.getFileName();
// 创建文件资源对象
Path path = Paths.get(filePath);
org.springframework.core.io.Resource resource = new UrlResource(path.toUri());
// 设置响应头
HttpHeaders headers = new HttpHeaders();
headers.add(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=" + fileName);
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
headers.set(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename*=UTF-8''" + URLEncoder.encode(fileName, StandardCharsets.UTF_8.toString()));
headers.set(HttpHeaders.CONTENT_ENCODING, "UTF-8");
headers.add(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename*=UTF-8''" + URLEncoder.encode(fileName, StandardCharsets.UTF_8.toString()));
// 返回文件内容
return ResponseEntity.ok()
.headers(headers)
.contentLength(resource.contentLength())
.contentType(MediaType.APPLICATION_OCTET_STREAM)
.body(resource);
}
@RequestMapping("/download-apk/output-metadata-json")
public String readJson() throws IOException {
PackageUploadVo vo = packageUploadService.findNewestList();
List<AttachmentEntity> attachmentList = vo.getAttachmentList();
AttachmentEntity file = new AttachmentEntity();
if( attachmentList.size()>0 ){
if( attachmentList.size()>0 ){
for( AttachmentEntity aeF : attachmentList ){
if( ".json".equals( aeF.getFileExtension() ) ){
file = aeF;
}
}
}
}
// 读取output-metadata.json文件
String filePath = file.getFileStoragePath();
String fileName = file.getFileName();
// 创建文件资源对象
Path path = Paths.get(filePath);
org.springframework.core.io.Resource resource = new UrlResource(path.toUri());
InputStream inputStream = resource.getInputStream();
byte[] jsonBytes = FileCopyUtils.copyToByteArray(inputStream);
String jsonContent = new String(jsonBytes, StandardCharsets.UTF_8);
// 返回文件内容
return jsonContent;
}
}
至此结束，有问题欢迎大家随时交流
