slow startup (500ms) with all apps made by My Android studio

Question

I'm a beginner and when i ever i make an app and i test it on real phone

the first activity takes 400-900ms to start, even when it's only show a text view or a button. (just empty App)

on the same phone i have few apps (Games) from Play Store , and they work instantly! there's no 10ms delay!

so I'm wondering why is this happening to me even if i make (Empty App)

I mean seriously, why would it starts slowly with this simple code:

   public class MainActivity extends AppCompatActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);


    setContentView(R.layout.activity_main);
    Button button = findViewById(R.id.button);
    button.setText("Hello World");

   }
 }

is your instant run enabled ? i have seen it takes time to load the app if its enabled. — Gautam, Nov 02 '17 at 08:11
`test it on real phone` are you generating the apk ? signing it without debug option? or just launching it ? — Yamen Nassif, Nov 02 '17 at 08:11
i made it with and without instant run feature, and i can't see a different — Loving Android, Nov 02 '17 at 08:12
Build->Build APK and i take the apk file to my phone and install it. — Loving Android, Nov 02 '17 at 08:14
check this : https://stackoverflow.com/questions/36966080/screen-goes-white-before-splash-in-android — Maddy, Nov 02 '17 at 08:26
If instant run is enabled, disable it and try launching application — Aswin P Ashok, Nov 02 '17 at 08:39
it's not enabled, and my app doesn't starts instantly for some reason — Loving Android, Nov 02 '17 at 08:45

score 0 · Answer 1 · answered Nov 02 '17 at 08:18

0

The problem is that the APK you are generating is with debug property on, so this APK is considered to be in development mode that's why it will take longer to launch. You need to generate a production APK (same one you can publish on Play Store) in order to have the same launch speed as the other apps. Check this out : Sign Your APK

answered Nov 02 '17 at 08:18

Yamen Nassif

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oh let me try that now – Loving Android Nov 02 '17 at 08:25
Yamen , i just did this , i generated a signed apk (release) but i can't install on my phone , i get this error : app is not installed – Loving Android Nov 02 '17 at 08:34
Then this is a different error, even with signed APK connect to your android studio you should see an error in the logcat. but as i said its a different issue. check this: https://stackoverflow.com/questions/4226132/app-not-installed-error-on-android – Yamen Nassif Nov 02 '17 at 08:37
ok i fixed that by uninstalling the previous version from my phone, but i still see delay ! same thing – Loving Android Nov 02 '17 at 08:37
first thing shows up is a white window then after 500ms app starts. – Loving Android Nov 02 '17 at 08:38
Unfortunately it's not enabled and still show some delay start – Loving Android Nov 02 '17 at 08:41

slow startup (500ms) with all apps made by My Android studio

1 Answers1