因为只是个demo测试,用于记录,所以后台使用 spring+springmvc+dbutils
数据库部分:
就这么一个很简单的 tb_version 表
v_id: 主键
v_code: 版本号(一般是整数数值)
v_name: 版本名称 (如:1.0.1)
v_desc: 版本描述介绍
v_down_url: 下载地址
v_type: 0选择性更新 1代表强制更新(没有取消按钮)
v_date: 版本发布时间
接下来是后台java部分:
@RestController
@RequestMapping("/app")
public class AppVersionController {
@Autowired
QueryRunner qr;
@RequestMapping("/version")
public ResultBean checkVersion() throws Exception{
ResultBean rb=new ResultBean();
rb.setCode(1);
String sql="select *from tb_version order by v_date desc limit 1";
VersionBean vBean=qr.query(sql, new BeanHandler<VersionBean>(VersionBean.class));
rb.setCode(0);
rb.setData(vBean);
return rb;
}
}
很简单就是查询出最新的一条返回给客户端
安卓端代码
布局文件xml: activity_main.xml
这里就一个文本控件,到时候用来显示当前的版本号 和 版本名称
<?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=".MainActivity">
<TextView
android:id="@+id/tv_version"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
这里用了okgo请求框架,
implementation 'com.jakewharton:butterknife:10.2.1'
annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.1'
implementation 'com.lzy.net:okgo:3.0.4'
implementation 'com.google.code.gson:gson:2.8.5'
所以自定义个MyApplication来初始化
package com.ls.myversion;
import android.app.Application;
import com.lzy.okgo.OkGo;
public class MyApplication extends Application {
@Override
public void onCreate() {
super.onCreate();
//初始化okgo
OkGo.getInstance().init(this);
}
}
记得改下清单文件和必要的权限
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<!-- 可以跳转并安装apk所需权限,不然不能兼容8.0 -->
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES"/>
<application
android:name=".MyApplication"
...
/>
编写对应的实体类VersionBean.class
public class VersionBean {
private int v_code;
private String v_name;
private String v_desc;
private String v_down_url;
private int v_type;
private String v_date;
//省略get,set,toString()
}
安卓端核心代码:
package com.ls.myversion;
import android.Manifest;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import com.google.gson.Gson;
import com.lzy.okgo.OkGo;
import com.lzy.okgo.callback.FileCallback;
import com.lzy.okgo.callback.StringCallback;
import com.lzy.okgo.model.Response;
import org.json.JSONObject;
import java.io.File;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.core.content.FileProvider;
import butterknife.BindView;
import butterknife.ButterKnife;
public class MainActivity extends AppCompatActivity {
@BindView(R.id.tv_version)
TextView tvVersion;
private Integer v_code;
private String v_name;
AlertDialog dialog=null;
private VersionBean vb;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
//读取当前版本的versionCode和versionName
PackageInfo pf=getMyVersion();
v_code=pf.versionCode;
v_name=pf.versionName;
//显示在文本空间上
tvVersion.setText(v_code+"=="+v_name);
//检测是否需要更新apk
checkVersion();
}
private void checkVersion() {
//向后台服务器发请求,获取最新的apk信息
OkGo.<String>get("http://192.168.0.107:8080/xxxxx/app/version").execute(new StringCallback() {
@Override
public void onSuccess(Response<String> response) {
//请求成功时
String result=response.body();
try {
JSONObject jsonObject=new JSONObject(result);
int code=jsonObject.getInt("code");
if (code==0){
Gson gson=new Gson();
//把服务器返回的结果转成实体类
vb=gson.fromJson(jsonObject.getString("data"),VersionBean.class);
//判断服务器返回的本版号是否大于当前的版本号
if (vb.getV_code()>v_code){
//大于则更新,然后判断是可以取消的选择性更新还是没有取消按钮的强制更新
if (vb.getV_type()==0){
showSelectDialog(vb);
}else {
//强制更新
showMustDialog(vb);
}
}
//不大于什么都不做...
}
}catch (Exception e){
e.printStackTrace();
}
}
});
}
//强制更新时的操作(弹出diglog)
private void showMustDialog(VersionBean vb) {
AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this);
builder.setCancelable(false);
String apkUrl=vb.getV_down_url();
builder.setTitle("版本更新")
.setMessage(vb.getV_desc())
.setPositiveButton("更新", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialog.dismiss();
//动态权限申请
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
} else {
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
} else {
showDownProgressDialog(vb);
}
}
}
});
dialog=builder.create();
dialog.show();
}
//下载弹窗
private void showDownProgressDialog(VersionBean vb) {
ProgressDialog pd=new ProgressDialog(MainActivity.this);
pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pd.setMessage("正在下载安装包,请稍等...");
pd.setCancelable(false);
pd.show();
String path= getSdPath()+"/download";
OkGo.<File>get(vb.getV_down_url()).execute(new FileCallback(path,"自己命名的新名字.apk") {
@Override
public void onSuccess(Response<File> response) {
Toast.makeText(MainActivity.this,"下载成功!",Toast.LENGTH_SHORT).show();
pd.dismiss();
installApk(new File(path+"/自己命名的新名字.apk"));
}
});
}
private void installApk(File apk) {
Intent intent=new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(Intent.ACTION_VIEW);
Uri apkFileUri;
if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.N){
apkFileUri= FileProvider.getUriForFile(MainActivity.this,BuildConfig.APPLICATION_ID+".provider",apk);
}else{
apkFileUri=Uri.fromFile(apk);
}
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.setDataAndType(apkFileUri,"application/vnd.android.package-archive");
Log.i("tag","开始安装");
try {
MainActivity.this.startActivity(intent);
// finish();
}catch (Exception e){
e.printStackTrace();
}
}
private String getSdPath(){
File sdDir = null;
boolean sdCardExist=Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
if (sdCardExist){
sdDir=Environment.getExternalStorageDirectory();
}
return sdDir.toString();
}
private void showSelectDialog(VersionBean vb) {
AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this);
builder.setCancelable(false);
String apkUrl=vb.getV_down_url();
builder.setTitle("版本更新")
.setMessage(vb.getV_desc())
.setPositiveButton("更新", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialog.dismiss();
//动态权限申请
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
} else {
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
} else {
showDownProgressDialog(vb);
}
}
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialog.dismiss();
}
});
dialog=builder.create();
dialog.show();
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode) {
case 1:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
} else {
showDownProgressDialog(vb);
}
} else {
Toast.makeText(this, "你拒绝了无法下载哟!", Toast.LENGTH_SHORT).show();
}
break;
default:
}
}
private PackageInfo getMyVersion() {
PackageInfo pf=null;
try {
PackageManager pm=getPackageManager();
pf=pm.getPackageInfo(getPackageName(),0);
}catch (Exception e){
e.printStackTrace();
}
return pf;
}
}
由于安卓7.0以后使用FileProvider访问sdk私有文件,所以需要创建个FileProvider
1.在清单文件中这样来写
<application
android:name=".MyApplication"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.MyVersion">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="自己的包名(com.ls.myversion).provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths" />
</provider>
</application>
2.在res下创建xml文件夹及文件
文件内容为:
<?xml version="1.0" encoding="utf-8"?>
<paths>
<!--path:需要临时授权访问的路径(.代表所有路径) name:就是你给这个访问路径起个名字-->
<external-path
name="external_files"
path="." />
</paths>
至此全部搞定
效果图:
此时的code:
当检测到更新时:
强制版的效果图就不展示了,点击更新后
就会开始下载,然后开始安装
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