Android Downloads Suddenly Crashes App After Working Fine

ok so my app was working perfect downloading with no issues at all i tried it on a firestick / nvidia shield and android TV emulator and it was working perfect one day but the next day when i opened the app to try it again the app crashes every time a download starts.

this is the version of react-native i am using and the version of rn-fetch-blob

“react-native”: “0.57.8”, “rn-fetch-blob”: “^0.10.15”

i have tried creating a new project and adding in just the modules needed for the downloads and used a static link to an apk file i know works perfectly fine and it does work perfect for a few tries but again when the app is closed and reopened sometime later it crashes again after a download starts.

this is the code for my downloads

console.log("Download Starting");
	
	const android = RNFetchBlob.android;
	const filename = APK_TITLE + ((Math.random() * 1000) | 0) + '.apk';
	const filePath = RNFetchBlob.fs.dirs.DownloadDir + '/' + filename ;
	
	console.log('Saving File To : ' + filePath);
	
	this.setState({AppName: APK_TITLE});
	this.setState({ Mode: 'download' });
	
	let APKDownload = RNFetchBlob.config({
			
			addAndroidDownloads : {
				useDownloadManager : false,
				mediaScannable : true,
				notification : true,
				mime : 'application/vnd.android.package-archive',
				title : filename,
				description : APK_DESC,
				path: filePath
			}
		})
		.fetch('GET', APK_URL);
		
	jobId = APKDownload.taskId;
	console.log(jobId);
	
    setTimeout(()=>{
		
		APKDownload.progress({ count : 1 },(received,total)=>{
			const percentage = (received / total).toFixed(2);
			const text = percentage;
			console.log('Download Progress : ' + text);
			this.setState({progress: text});
		})
    }, 0)
	
    APKDownload.then(async (res)=>{
			
			this.setState({Mode: 'apks'});
			this.setState({AppName: ''});
			this.setState({progress: 0.00});
			
			console.log('Installing APK');
			android.actionViewIntent(res.path(), 'application/vnd.android.package-archive');
		
    }).catch((err)=>{
       //you must add this line. If you don't add, your app users waste they're storage
        //RNFetchBlob.fs.unlink(filePath);
        console.log(err)
    })
	
}

after attaching a debugger in android studio i have found this

I/ReactNativeJS: Download Process Starting
    APK Saving To : /storage/emulated/0/Download/Cyberflixx150.apk
I/ReactNativeJS: Download ID Assigned : wz3qit80wzj2h01bn6n5
E/AndroidRuntime: FATAL EXCEPTION: OkHttp Dispatcher
    Process: com.update, PID: 14132
    java.lang.IllegalArgumentException: path can't be null
        at android.app.DownloadManager.validateArgumentIsNonEmpty(DownloadManager.java:1418)
        at android.app.DownloadManager.addCompletedDownload(DownloadManager.java:1375)
        at android.app.DownloadManager.addCompletedDownload(DownloadManager.java:1325)
        at com.RNFetchBlob.RNFetchBlobReq$3.onResponse(RNFetchBlobReq.java:443)
        at okhttp3.RealCall$AsyncCall.execute(RealCall.java:153)
        at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
        at java.lang.Thread.run(Thread.java:761)

the path is clearly set and even if i remove the let apk path veriable and set the path in path: still the same error 😕

[bozhouyongqi]

I have solved this problem,but i used the downloadManager.Following is the code:

        const android = RNFetchBlob.android;
        const filename = 'name.apk';
        const filepath = RNFetchBlob.fs.dirs.DownloadDir + '/' + filename;
        const downloadAppUrl = ''http://www.moji.com/android_down.php';';// moji weather apk

        RNFetchBlob.config({
            addAndroidDownloads: {
                useDownloadManager: true,
                title: 'great, download success',
                description:'an apk that will be download',
                mime: 'application/vnd.android.package-archive',
                // mime: 'image/jpeg',
                // mediaScannable: true,
                notification: true,
                path: filepath
            }
        })
        .fetch('GET', downloadAppUrl)
        .then((res) => {
            // console.log('res.path ', res.path());
            alert('res.path ', res.path());
            android.actionViewIntent(res.path(), 'application/vnd.android.package-archive');
        })
        .catch((err) => {
            alert('download error, err is', JSON.stringify(err));
        });

The difference with the official document is that i added the path optional field in the addAndroidDownloads object.When i delete the path field,the it will come into the catch code,then download the app will be wrongly.

the version of react-native i am using and the version of rn-fetch-blob are “react-native”: “0.57.3”, “rn-fetch-blob”: “^0.10.15”, and the os is macOS 10.13.6

[mahdi-gh1373]

@Rob2k9 Could you share your code that resolve this problem ? I need a progress in my app to show user.