Android 11中JavaScript下的原始文件路径访问

Question

1）android TargetSDKVersion30 requestLegacyExternalStorage=false。

android {
    compileSdkVersion 30
    defaultConfig {
        applicationId "com.example.ui"
        minSdkVersion 21
        targetSdkVersion 30
        }
     }
    }

在基于cordova的android应用程序中，从javascript级别完成XMLHttpRequest请求。

var xhr = new XMLHttpRequest();
xhr.open("GET", lFileUrl, true);
xhr.responseType = "blob";
UI.Util.info("PtxUtils.getInlineAttachmnetJson() >> inside xhr.open");
xhr.onload = function(e) {
try {
UI.Util.info("PtxUtils.getInlineAttachmnetJson() >> inside xhr.onload");
}
                

3)XMLHttpRequest引发错误

ERR_ACCESS_DENIED, when getFilesDir() API used.
PtxUtils.js:2950 GET 

file:///data/user/0/com.example.ui/files/KK&T%20SEW_temp/IMG-20200630-223714.jpg net::ERR_ACCESS_DENIED

23:09:57.058 PtxUtils.js:2950 XHR failed loading: GET "file:///data/user/0/com.example.ui/files/KK&T%20SEW_temp/IMG-20200630-223714.jpg".

ERR_ACCESS_DENIED, when getExternalFilesDir()() API used.

PtxUtils.js:2950 GET file:///storage/emulated/0/Android/data/com.example.ui/files/KK&T%20SEW_temp/IMG-20200701-135735.jpg net::ERR_ACCESS_DENIED

PtxUtils.js:2950 XHR failed loading: GET "file:///storage/emulated/0/Android/data/com.example.ui/files/KK&T%20SEW_temp/IMG-20200701-135735.jpg".    

5）android targetSdkVersion 29 requestLegacyExternalStorage=false

with getFilesDir() path getExternalFilesDir() XMLHttpRequest is pass with no error, file data is retrieved.




                        

Answer 1

在我看来，您可能需要以下权限：

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

为了更好地衡量，我也会尝试：

<uses-permission android:name="android.permission.INTERNET"/>

并把这个放在清单上：

<application
    android:usesCleartextTraffic="true">
</application>

webView.getSettings().setAllowContentAccess(true);
webView.getSettings().setAllowFileAccess(true);