getting app Crashed every time when the user open the app from Playstore

Question

although the concern is somewhat related to null as the ownText() returns null that's fine and can be handle the main-concern is the approach used is not well enough i am checking div[itemprop=softwareVersion .i have change the version checking with the answer given below which is just checking the softwareVersion for version on the playstore .

Original Question I have a live app which was working fine few days back ,now have a concern as when the user open app from the Play store or from app drawer or from home screen shortcut .app is getting crashed randomly and out 1/5 it is launching fine

Below is the version checker code

build.gradle(app level)

compile 'org.jsoup:jsoup:1.8.3'

java code:

public class VersionChecker extends AsyncTask<String, String, String> {
    String newVersion;
    Context context;
    public VersionChecker(Context context) {
        this.context = context;
    }
    @Override
    protected String doInBackground(String... params) {
        try {
            newVersion = Jsoup.connect("https://play.google.com/store    /apps/details?id=" + context.getPackageName() + "&hl=en")
                    .timeout(30000)
                    .userAgent("Mozilla/5.0 (Windows; U; WindowsNT 5.1; en-US; rv1.8.1.6) Gecko/20070725 Firefox/2.0.0.6")
                    .referrer("http://www.google.com")
                    .get()
                    .select("div[itemprop=softwareVersion]")
                    .first()
                    .ownText();
        } catch (IOException e) {
            e.printStackTrace();
        }

            return newVersion;
    } }

and below is the exception trace

Exception: FATAL EXCEPTION: main Process: com.demo.android.myapp, PID: 5325 java.lang.RuntimeException: Unable to resume activity {com.demo.android.myapp/com.demo.android.myapp.SplashActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equalsIgnoreCase(java.lang.String)' on a null object reference at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3103) at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3134) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2481) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equalsIgnoreCase(java.lang.String)' on a null object reference at com.demo.android.myapp.SplashActivity.checkVersion(SplashActivity.java:81) at com.demo.android.myapp.SplashActivity.onResume(SplashActivity.java:242) at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1258) at android.app.Activity.performResume(Activity.java:6327) at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3092) at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3134) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2481) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

add String newVersion="". some times you won't connect to internet, that time newVersion will be null or check neqVersion is null or not before checking — Vinayak B, Mar 23 '18 at 07:08
nothing much in SplashActivity as primary concern is with version checker BTW i am using `VersionChecker versionChecker=new VersionChecker(); latestVersion = versionChecker.execute().get();`@ManthanPatel and @ Vinayak B null case is handled as `if (newVersion != null) return newVersion; else return CommonUtilities.getAppVersionName(context);` — Shekhu, Mar 23 '18 at 07:24
Duplicate of [What is a NullPointerException, and how do I fix it?](https://stackoverflow.com/questions/218384/what-is-a-nullpointerexception-and-how-do-i-fix-it) — Zoe, Mar 23 '18 at 07:35
This code is working only in the case of 1.1,...1.9 ,2.0,2.1 ... .etc not in case of 1.1.9 , 2.0.0...make sure that things. — Radhey, Mar 23 '18 at 08:21

score 0 · Accepted Answer · answered Mar 23 '18 at 07:31

I had faced the same issue and found the solution is working fine for me:

build.gradle(app level)

 compile 'com.squareup.okhttp:okhttp:2.5.0'

java code:

public class VersionChecker extends AsyncTask<String, String, String> {
String newVersion;
Context context;
public VersionChecker(Context context) {
     this.context = context;
}
@Override
protected String doInBackground(String... params) {
    OkHttpClient client = new OkHttpClient();
    Request request = new Request.Builder()
            .url("https://play.google.com/store/apps/details?id=" + context.getPackageName() + "&hl=en")
            .build();
    try {
        Response response = client.newCall(request).execute();
        result = response.body().string();
    if(result!=null && result.contains("softwareVersion")){
        String parts[] = result.split("softwareVersion");
        result= parts[1].substring(
                parts[1].indexOf('>') + 1, parts[1].indexOf('<')
        ).trim();
    }else {
        result=CommonUtilities.getAppVersionName(context);
    }
    } catch (Exception ex) {
        result=CommonUtilities.getAppVersionName(context);
        ex.printStackTrace();
    }
    return result;
}}

getting app Crashed every time when the user open the app from Playstore

1 Answers1