详解Android app自动更新总结（已适配9.0）

2019-12-12 00:12:55

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1.配置：

1.1 AndroidManifest.xml中添加权限和FileProvider：

 <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"/> <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />  <provider   android:name="androidx.core.content.FileProvider"   android:authorities="com.fengzhi.wuyemanagement.fileprovider"   android:grantUriPermissions="true"   android:exported="false">   <meta-data    android:name="android.support.FILE_PROVIDER_PATHS"    android:resource="@xml/file_paths" />  </provider>

1.2 新建文件（路径：res/xml/file_paths.xml）:

<paths> <external-path path="." name="external_storage_root" /></paths>

1.3 (app的)build.gradle:

 implementation "com.lzy.net:okgo:3.0.4"//okgo 网络请求 implementation 'com.google.code.gson:gson:2.8.2'//gson implementation "org.permissionsdispatcher:permissionsdispatcher:4.3.1"//权限 annotationProcessor "org.permissionsdispatcher:permissionsdispatcher-processor:4.3.1"//权限

2.这里以点击按钮进行更新为例：

2.1 核心代码：

 private int version; /* 更新进度条 */ private ProgressBar mProgress; private AlertDialog mDownloadDialog; --------------------------------------------------------------------------------------------------------------------  //点击按钮，检查权限，，，检查更新的方法 @NeedsPermission({Manifest.permission.READ_EXTERNAL_STORAGE,   Manifest.permission.WRITE_EXTERNAL_STORAGE,   Manifest.permission.REQUEST_INSTALL_PACKAGES}) protected void checkUpdate() {  showLoadingDialog("检测更新中...");  version = AppUpdateUtil.getAppVersionCode(this);//检查当前版本号//  调用方法，，，接口的具体实现，接收传过来的参数，再调自己的方法，  requestAppUpdate(version, new DataRequestListener<UpdateAppBean>() {   @Override   public void success(UpdateAppBean data) {//    返回的json，getStatus为0时，去下载apk文件,这里是下载apk文件的方法    updateApp(data.getData().getApk_url());   }   @Override   public void fail(String msg) {//    返回的json，getStatus为1时，提示："已是最新版本！"    SToast(msg);    dismissLoadingDialog();   }  }); } //检查版本号，第一次请求(post)，，，UpdateAppBean根据服务器返回生成 private void requestAppUpdate(int version, final DataRequestListener<UpdateAppBean> listener) {  OkGo.<String>post(Const.HOST_URL + Const.UPDATEAPP).params("version", version).execute(new StringCallback() {   @Override   public void onSuccess(Response<String> response) {    Gson gson = new Gson();    UpdateAppBean updateAppBean = gson.fromJson(response.body(), UpdateAppBean.class);    if (updateAppBean.getStatus() == 0) {     listener.success(updateAppBean);    } else {     listener.fail(updateAppBean.getMsg());    }   }   @Override   public void onError(Response<String> response) {    listener.fail("服务器连接失败");    dismissLoadingDialog();   }  }); } //如果有新版本，提示有新的版本，然后下载apk文件 private void updateApp(String apk_url) {  dismissLoadingDialog();  DialogUtils.getInstance().showDialog(this, "发现新的版本，是否下载更新？",    new DialogUtils.DialogListener() {   @Override   public void positiveButton() {    downloadApp(apk_url);   }  }); } //下载apk文件并跳转(第二次请求，get) private void downloadApp(String apk_url) {  OkGo.<File>get(apk_url).tag(this).execute(new FileCallback() {   @Override   public void onSuccess(Response<File> response) {    String filePath = response.body().getAbsolutePath();    Intent intent = IntentUtil.getInstallAppIntent(mContext, filePath);//    测试过这里必须用startactivity，不能用stratactivityforresult    mContext.startActivity(intent);    dismissLoadingDialog();    mDownloadDialog.dismiss();    mDownloadDialog=null;   }   @Override   public void downloadProgress(Progress progress) {//      showDownloadDialog();//      mProgress.setProgress((int) (progress.fraction * 100));    if (mDownloadDialog == null) {     // 构造软件下载对话框     AlertDialog.Builder builder = new AlertDialog.Builder(mContext);     builder.setTitle("正在更新");     // 给下载对话框增加进度条     final LayoutInflater inflater = LayoutInflater.from(mContext);     View v = inflater.inflate(R.layout.item_progress, null);     mProgress = (ProgressBar) v.findViewById(R.id.update_progress);     builder.setView(v);     mDownloadDialog = builder.create();     mDownloadDialog.setCancelable(false);     mDownloadDialog.show();    }    mProgress.setProgress((int) (progress.fraction * 100));   }  }); }

2.2 DataRequestListener：

public interface DataRequestListener<T> { //请求成功 void success(T data); //请求失败 void fail(String msg);}

接下来是工具类，来自github，参考， https://github.com/vondear/RxTool

2.3 AppUpdateUtil：

 /**  * 获取App版本码  *  * @param context 上下文  * @return App版本码  */ public static int getAppVersionCode(Context context) {  return getAppVersionCode(context, context.getPackageName()); }

2.4 IntentUtil：

public class IntentUtil { /**  * 获取安装App(支持7.0)的意图  *  * @param context  * @param filePath  * @return  */ public static Intent getInstallAppIntent(Context context, String filePath) {  //apk文件的本地路径  File apkfile = new File(filePath);  if (!apkfile.exists()) {   return null;  }  Intent intent = new Intent(Intent.ACTION_VIEW);  Uri contentUri = FileUtil.getUriForFile(context, apkfile);  intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {   intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);  }  intent.setDataAndType(contentUri, "application/vnd.android.package-archive");  return intent; }

2.5 FileUtil：

 /**  * 将文件转换成uri(支持7.0)  *  * @param mContext  * @param file  * @return  */ public static Uri getUriForFile(Context mContext, File file) {  Uri fileUri = null;  if (Build.VERSION.SDK_INT >= 24) {   fileUri = FileProvider.getUriForFile(mContext, mContext.getPackageName() + ".fileprovider", file);  } else {   fileUri = Uri.fromFile(file);  }  return fileUri; }

3.遇到的问题

9.0手机authorities配置出错，导致无法安装，解决办法：