离子角电容器-未找到FileOpener活动:未找到处理意图的活动

Question

我有一个Angular 12 Capacitor应用程序，我试图在用户选择的任何本地应用程序中打开下载的文件。

我使用ionic-native/File和ionic-native/FileOpener

const dataType = event.body.type;
          const binaryData = [];
          binaryData.push(event.body);

          if (this.platform.is('mobile') && this.platform.is('capacitor')) {
            // running native mobile, try and open file
            console.log('mobile open file');
            const blob = new Blob(binaryData, { type: dataType });
            this.file.writeFile(this.file.dataDirectory, attachment.name, blob, {replace: true}).then(() => {
              console.log('file should be saved');
              this.fileOpener.open(this.file.dataDirectory + attachment.name, dataType).then(() => console.log('file should be open'));
            });
          } else {
            // not running native mobile, download the attachment
            const downloadLink = document.createElement('a');
            downloadLink.href = window.URL.createObjectURL(new Blob(binaryData, { type: dataType }));
            downloadLink.setAttribute('download', attachment.name);
            downloadLink.setAttribute('target', '_self');
            document.body.appendChild(downloadLink);
            downloadLink.click();
          }

但是，每次调用fileopener.open时，我都会收到一个错误，指出Activity Not Found:找不到处理意图的活动。以下是日志

I/Capacitor/Console: File: http://localhost/main.js - Line 3580 - Msg: mobile open file
V/Capacitor/Plugin: To native (Cordova plugin): callbackId: File189568326, service: File, action: resolveLocalFileSystemURI, actionArgs: ["file:\/\/\/data\/user\/0\/com.company.appname\/files\/"]
V/Capacitor/Plugin: To native (Cordova plugin): callbackId: File189568327, service: File, action: getFile, actionArgs: ["cdvfile:\/\/localhost\/files\/","1635956966683.jpeg",{"create":true,"exclusive":false}]
V/Capacitor/Plugin: To native (Cordova plugin): callbackId: File189568328, service: File, action: getFileMetadata, actionArgs: ["cdvfile:\/\/localhost\/files\/1635956966683.jpeg"]
V/Capacitor/Plugin: To native (Cordova plugin): callbackId: File189568329, service: File, action: write, actionArgs: ["cdvfile:\/\/localhost\/files\/1635956966683.jpeg","{data removed}"
I/Capacitor/Console: File: http://localhost/main.js - Line 3583 - Msg: file should be saved
V/Capacitor/Plugin: To native (Cordova plugin): callbackId: FileOpener2189568330, service: FileOpener2, action: open, actionArgs: ["file:\/\/\/data\/user\/0\/com.company.appname\/files\/1635956966683.jpeg","application\/octet-stream"]
E/Capacitor/Console: File: http://localhost/vendor.js - Line 48142 - Msg: ERROR Error: Uncaught (in promise): Object: {"status":9,"message":"Activity not found: No Activity found to handle Intent { act=android.intent.action.VIEW dat=content://com.company.appname.fileOpener2.provider/files/1635956966683.jpeg typ=application/octet-stream flg=0x3 }"}

我的假设是，对于添加到AndroidManifest.xml中的android.intent.action.VIEW，我需要一些意图过滤器，但我不知道是什么。有什么想法吗？

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.company.appname">

    <application
        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/AppTheme"
        android:requestLegacyExternalStorage="true">


        <activity
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|smallestScreenSize|screenLayout|uiMode"
            android:name="com.company.appname.MainActivity"
            android:label="@string/title_activity_main"
            android:theme="@style/AppTheme.NoActionBarLaunch"
            android:launchMode="singleTask">

            <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="${applicationId}.fileprovider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths"></meta-data>
        </provider>
    </application>

    <!-- Permissions -->

    <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.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.CAMERA"/>
</manifest>

Answer 1

因此，错误消息实际上是一条隐秘的消息。这实际上与意图和AndroidManifest.xml无关。不，实际的问题是fileOpener.open()调用的MIMEType。传入的类型是application/octet-stream，本机设备没有可以打开该类型的应用程序，因此它抛出一个错误。因为这个文件是jpeg文件，所以我将其更改为image/jpeg，它可以完美地打开。以下是更新后的代码

            this.file.writeFile(this.file.dataDirectory, attachment.name, blob, { replace: true }).then(() => {
              console.log('file should be saved');
              this.file.resolveLocalFilesystemUrl(this.file.dataDirectory + attachment.name).then(fileInfo => {
                const files = fileInfo as FileEntry;
                files.file(success => {
                  this.fileOpener.open(this.file.dataDirectory + attachment.name, success.type).then(() => console.log('file should be open'));
                });
              });
            });

我添加了file.resolveLocalFilesystemUrl()，因为这个调用基本上获取了存储文件的元数据。然后，您可以获取文件的类型并将其传递到fileopener.open()