安卓7.0以上版本更新apk报错

来源：互联网发布：java 时间段拆分编辑：程序博客网时间：2024/06/08 17:22

由于项目需求，项目组的老代码需要推翻重写，现以7.0系统基础上，安装apk时崩溃了，异常：

FATAL EXCEPTION: main
Process: com.hx.newzszz302, PID: 27179
android.os.FileUriExposedException: file:///storage/emulated/0/ZSDX203/download/2.0.1zsdx.apk exposed beyond app through Intent.getData()
at android.os.StrictMode.onFileUriExposed(StrictMode.java:1816)
at android.net.Uri.checkFileUriExposed(Uri.java:2350)
at android.content.Intent.prepareToLeaveProcess(Intent.java:9076)
at android.content.Intent.prepareToLeaveProcess(Intent.java:9037)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1530)
at android.app.ContextImpl.startActivity(ContextImpl.java:881)
at android.app.ContextImpl.startActivity(ContextImpl.java:851)
at android.content.ContextWrapper.startActivity(ContextWrapper.java:356)
at com.hx.newzszz.common.utils.FileUtils.installApk(FileUtils.java:106)
at com.hx.newzszz.splash.SplashPresenter.updateApk(SplashPresenter.java:167)
at com.hx.newzszz.splash.SplashActivity$2.update(SplashActivity.java:122)
at com.hx.newzszz.common.widget.UpdateApkDialog.onClick(UpdateApkDialog.java:92)
at android.view.View.performClick(View.java:5646)
at android.view.View$PerformClick.run(View.java:22450)
at android.os.Handler.handleCallback(Handler.java:755)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:156)
at android.app.ActivityThread.main(ActivityThread.java:6524)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)

这就十分蛋疼了，运行了一下老代码，发现并没有报错，照样跑，于是百度发现，原来是7.0作祟。

查看了几位大神的博客，发现解决方法如下：

1、在AndroidManifest.xml中添加provider<provider            android:name="android.support.v4.content.FileProvider"            android:authorities="com.hx.newzszz.fileProvider"            android:grantUriPermissions="true"            android:exported="false">            <meta-data                android:name="android.support.FILE_PROVIDER_PATHS"                android:resource="@xml/file_paths" />        </provider>

2、根据AndroidManifest.xml中添加的provider创建资源文件

内容：<?xml version="1.0" encoding="utf-8"?><paths>    <external-path        name="files_root"        path="Android/data/com.hx.newzszz/" />//此处填写包名    <external-path        name="external_storage_root"        path="." /></paths>
3、安装代码：  /**     * 安装Apk     *     * @param apkFile     */    public static void installApk(File apkFile) {        Intent intent = new Intent(Intent.ACTION_VIEW);        //判断是否是AndroidN以及更高的版本        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {            intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);            Uri contentUri = FileProvider.getUriForFile(ZszzApplication.getInstance(),                    BuildConfig.APPLICATION_ID + ".fileProvider", apkFile);            intent.setDataAndType(contentUri, "application/vnd.android.package-archive");        } else {            intent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive");            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        }        ZszzApplication.getInstance().startActivity(intent);    }
另外：！！经过改动后，终于以为可以跑了，结果又报错了，这个错误最坑：E/AndroidRuntime: FATAL EXCEPTION: main                                                                Process: com.hx.newzszz, PID: 26387                                                                java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourceParser android.content.pm.PackageItemInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' on a null object reference                                                                    at android.support.v4.content.FileProvider.parsePathStrategy(FileProvider.java:583)                                                                    at android.support.v4.content.FileProvider.getPathStrategy(FileProvider.java:557)                                                                    at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:399)                                                                    at com.hx.newzszz.common.utils.FileUtils.installApk(FileUtils.java:102)                                                                    at com.hx.newzszz.splash.SplashPresenter.updateApk(SplashPresenter.java:167)                                                                    at com.hx.newzszz.splash.SplashActivity$2.update(SplashActivity.java:122)                                                                    at com.hx.newzszz.common.widget.UpdateApkDialog.onClick(UpdateApkDialog.java:92)                                                                    at android.view.View.performClick(View.java:5646)                                                                    at android.view.View$PerformClick.run(View.java:22450)                                                                    at android.os.Handler.handleCallback(Handler.java:755)                                                                    at android.os.Handler.dispatchMessage(Handler.java:95)                                                                    at android.os.Looper.loop(Looper.java:156)                                                                    at android.app.ActivityThread.main(ActivityThread.java:6524)                                                                    at java.lang.reflect.Method.invoke(Native Method)                                                                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)                                                                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)

这是因为步骤3中红色部位".fileProvider"
和步骤1中的android:authorities="com.hx.newzszz.fileProvider"的.fileprovider"
不一致，这就导致后面调用
final ProviderInfo info = context.getPackageManager()                .resolveContentProvider(authority, PackageManager.GET_META_DATA);final XmlResourceParser in = info.loadXmlMetaData(                context.getPackageManager(), META_DATA_FILE_PROVIDER_PATHS);
方法时会空指针

阅读全文

0 0