crash if set wrong time

project reposiitories

https://github.com/daktak/afh_downloader

expected behavior

when the user set the download time should this application still can work if the time is changed incorrectly.

actual behavior

when a user types a letter in the timing section, this app crashes and can no longer be used.

how to reproduce

• download afh downloader from this link https://f-droid.org/packages/org.afhdownloader/
• after app is installed. launch the app
• click the three dots in the top right of the app
• go to setting options
• activate daily download
• click in hours section write one letter
  -clik okey and minimize the app
• and then re-open the app and note the bug

browser: afh downloader v 0.6.4
devie : android 5.1 idos

bug recording

logcat file to help dev to fix it

Process: org.afhdownloader, PID: 26431
java.lang.RuntimeException: Unable to start activity ComponentInfo{org.afhdownloader/org.afhdownloader.MainActivity}: java.lang.NumberFormatException: Invalid int: "3@"
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2367)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2429)
    at android.app.ActivityThread.access$800(ActivityThread.java:157)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1319)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:135)
    at android.app.ActivityThread.main(ActivityThread.java:5376)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:947)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:742)
Caused by: java.lang.NumberFormatException: Invalid int: "3@"
    at java.lang.Integer.invalidInt(Integer.java:138)
    at java.lang.Integer.parse(Integer.java:410)
    at java.lang.Integer.parseInt(Integer.java:367)
    at java.lang.Integer.parseInt(Integer.java:334)
    at org.afhdownloader.MainActivity.setRecurringAlarm(MainActivity.java:143)
    at org.afhdownloader.MainActivity.setAlarm(MainActivity.java:131)
    at org.afhdownloader.MainActivity.onCreate(MainActivity.java:115)
    at android.app.Activity.performCreate(Activity.java:6012)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2311)
    ... 10 more```