在某些设备上从 Android Webview 应用程序下载文件时出现“不幸的是，...已停止”

Question

在我的 android Web 视图应用程序中，我使用下面的代码从应用程序下载文件。它运行良好，我可以在我的 Samsung J2 (Android 5.2.2. API 22) 上下载文件（但是当我尝试从 Symphony i10 下载任何文件时（Android 6. API 23) 它“不幸的是，...已经停止”。我没有尝试使用任何其他设备。但我尝试了 Android 模拟器（虚拟设备 API 24 和 API 26).同样的问题显示.

我该如何解决这个问题？

主要Activity:

wv.setWebViewClient(new WebViewClient(){


        public boolean shouldOverrideUrlLoading(WebView view, String url) {

            boolean value = true;
            String extension = MimeTypeMap.getFileExtensionFromUrl(url);
            if (extension != null) {
                MimeTypeMap mime = MimeTypeMap.getSingleton();
                String mimeType = mime.getMimeTypeFromExtension(extension);
                if (mimeType != null) {
                    if (mimeType.toLowerCase().contains("pdf")                                                           

                            || extension.toLowerCase().contains("jpeg")
                            || extension.toLowerCase().contains("jpg")
                            || extension.toLowerCase().contains("png")                        



                            ) {
                        DownloadManager mdDownloadManager = (DownloadManager)getSystemService(Context.DOWNLOAD_SERVICE);
                        DownloadManager.Request request = new DownloadManager.Request(
                                Uri.parse(url));
                        String name= URLUtil.guessFileName(url,null,MimeTypeMap.getFileExtensionFromUrl(url));
                        File destinationFile = new File(Environment.getExternalStorageDirectory(),name);
                        request.setDescription("Downloading...");
                        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
                        // request.setDestinationUri(Uri.fromFile(destinationFile));
                        request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,name);
                        mdDownloadManager.enqueue(request);
                        //value = false;
                    }
                }


                if (!url.contains("my site url")) { // Could be cleverer and use a regex

                    Intent intent = new Intent(Intent.ACTION_VIEW);
                    intent.setData(Uri.parse(url)); // only used based on your example.
                    String title = "Select a browser";
                    // Create intent to show the chooser dialog
                    Intent chooser = Intent.createChooser(intent, title);
                    // Verify the original intent will resolve to at least one activity
                    // Verify the intent will resolve to at least one activity
                    if (intent.resolveActivity(getPackageManager()) != null) {
                        startActivity(chooser);
                    }

                    return true;
                }
                return false;
            }
            return false;

        }


        @Override
        public void onReceivedError(WebView view, int errorCode, String description, String failingUrl)  {
            wv.loadUrl(mypage_error);
        }
    });

清单：

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />      
<uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />
<uses-permission android:name="android.permission.ACCESS_DOWNLOAD_MANAGER" />

gradle:

android {
compileSdkVersion 25
buildToolsVersion "25.0.3"
defaultConfig {
    applicationId "com.my.app"
    minSdkVersion 15
    targetSdkVersion 25
    versionCode 5
    versionName '3.5'
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}

SDK

注意 my previous question is here 像这样：文件将下载上面提到的（扩展名），除了我的网站 url 所有 link 都应该打开移动浏览器。但是我没有得到答案，这就是为什么我在打开外部 link 之前使用下面的代码发出警告。

if (!url.contains("my site url")) { // Could be cleverer and use a regex

                    Intent intent = new Intent(Intent.ACTION_VIEW);
                    intent.setData(Uri.parse(url)); // only used based on your example.
                    String title = "Select a browser";
                    // Create intent to show the chooser dialog
                    Intent chooser = Intent.createChooser(intent, title);
                    // Verify the original intent will resolve to at least one activity
                    // Verify the intent will resolve to at least one activity
                    if (intent.resolveActivity(getPackageManager()) != null) {
                        startActivity(chooser);
                    }

                    return true;

Answer 1

您可以在运行时间添加请求权限 API 23+

引用 link:~

https://developer.android.com/training/permissions/requesting.html

或Ref.link:~

https://www.androidhive.info/2016/11/android-working-marshmallow-m-runtime-permissions/

在某些设备上从 Android Webview 应用程序下载文件时出现“不幸的是，...已停止”

“Unfortunately, … has stopped” when Downloading file from Android Webview app in certain device

android

crash

android-webview

android-download-manager