1.配置:
1.1 AndroidManifest.xml中添加权限和FileProvider:
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< 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):
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< paths > < external-path path = "." name = "external_storage_root" /> </ paths > |
1.3 (app的)build.gradle:
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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:
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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:
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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:
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/** * 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:
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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:
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/** * 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:
1.项目中使用了Androidx,AndroidManifest.xml的配置中就必须使用androidx的fileprovider
2.这里的authorities与FileUtil.java中的要一样,我就是字母P大写了导致错误
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://juejin.im/post/5cc3b00a518825253a16af2a