how disable button if app not install in phone

Question

I have button and i want disable this button if app by Package not installed and user can click if app install in phone ..

my code

    Button start = (Button) findViewById(R.id.bt_start);
    boolean isAppInstalled = appInstalledOrNot("com.check.application");
    if(isAppInstalled) {
        Intent Start_screen = new Intent(SplashScreen.this, MainActivity.class);
        startActivity(Start_screen);

    } else {

        start.setEnabled(false);

    }
}

private boolean appInstalledOrNot(String uri) {
    PackageManager pm = getPackageManager();
    try {
        pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);
        return true;
    } catch (PackageManager.NameNotFoundException e) {
    }

    return false;
}

I use this code but the button is disabled at all times .. if app install the button disable and if not install the button disable

what is the method returning if the app is not installed? did you check? — Abdul Waheed, Dec 04 '17 at 12:24
did you change "com.check.application" by some already installed app's packages? — Ankit Patidar, Dec 04 '17 at 12:27
Try with this package for check youtube is installed or not..."com.google.android.youtube" — Ankit Patidar, Dec 04 '17 at 12:29
Possible duplicate of [How to check programmatically if an application is installed or not in Android?](https://stackoverflow.com/questions/11392183/how-to-check-programmatically-if-an-application-is-installed-or-not-in-android) — ADM, Dec 04 '17 at 12:33

score 0 · Answer 1 · answered Dec 04 '17 at 12:25

Why don't you try below method to check for existence of package in android

public boolean isPackageExisted(String targetPackage){
    List<ApplicationInfo> packages;
    PackageManager pm;

    pm = getPackageManager();        
    packages = pm.getInstalledApplications(0);
    for (ApplicationInfo packageInfo : packages) {
        if(packageInfo.packageName.equals(targetPackage))
            return true;
    }
    return false;
}

Call method isPackageExisted with targetPacket.

score 0 · Answer 2 · answered Dec 04 '17 at 12:27

     boolean isAppInstalled = appInstalledOrNot("com.check.application");  
    btn.setEnabled(isAppInstalled) 

        private boolean appInstalledOrNot(String uri) {
            PackageManager pm = getPackageManager();
            try {
                pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);
                return true;
            } catch (PackageManager.NameNotFoundException e) {
                  return false;
            }

how disable button if app not install in phone

2 Answers2