程序中XXXX部分和//TODO部分根据具体项目进行修改和完善。

public class UpdateHelper {

private static final String TAG = "UpdateHelper";

private static final String FILE_PROVIDER_AUTHORITY = "XXXX";

private static final String DATA_AND_TYPE = "application/vnd.android.package-archive";

private static final String UPDATE_URL = "XXXX";

public static boolean checkForUpdated(Context context) {

boolean updated = false;

try {

int currentVersion = context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionCode;

} catch (PackageManager.NameNotFoundException e) {

e.printStackTrace();

}

//TODO 获取服务端最新版本号，与currentVersion做比较

return updated;

}

public static void autoInstallUpdate(final Context context) {

OkGo.get(UPDATE_URL).tag(context).execute(new FileCallback() {

@Override

public void onSuccess(Response response) {

File file = response.body();

setPermission(file.getPath());

installApk(context, file.getPath());

}

@Override

public void onError(Response response) {

super.onError(response);

//TODO 网络请求出错

}

@Override

public void onFinish() {

super.onFinish();

//TODO 网络请求结束

}

@Override

public void downloadProgress(Progress progress) {

super.downloadProgress(progress);

int fraction = (int) (progress.fraction * 100);

//TODO 下载中，显示下载进度

}

});

}

private static void installApk(Context context, String apkPath) {

Intent intent = new Intent(Intent.ACTION_VIEW);

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

File file = new File(apkPath);

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

Uri apkUri = FileProvider.getUriForFile(context, FILE_PROVIDER_AUTHORITY, file);

intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);

intent.setDataAndType(apkUri, DATA_AND_TYPE);

} else {

Uri apkUri = Uri.fromFile(file);

intent.setDataAndType(apkUri, DATA_AND_TYPE);

}

context.startActivity(intent);

}

private static void setPermission(String filePath) {

String command = "chmod " + "777" + " " + filePath;

Runtime runtime = Runtime.getRuntime();

try {

runtime.exec(command);

} catch (IOException e) {

e.printStackTrace();

}

}

}