How to prevent double code running by clicking twice fast to a button in Android

Question

If i click fast to my button in my Android app, it seems that code behind it runs twice. If i click my menu button twice the activity that has to be launch onclick just star

Answer 1

Well, that's the expected behaviour...

Launch your new acvitity with SINGLE_TOP flag

Or try setting android:launchMode="singleInstance" for Top20 activity in your AndroidManifest.xml

Answer 2

Use frozen variable inside Application class.

That is

public class App extends Application {
public static boolean frozen = false;
}

somewhere while click:

//...
onClick() {
if (frozen) {
return;
}
frozen = true
}
//...

Somewhere to release, for instance, when new Activity has been launched

onCreate (...) {
super.onCreate(...);
frozen = false;
}

in AndroidManifest.xml:

<application
        android:allowBackup="true"
        android:largeHeap="true"
        android:name="com.example.App"
        android:icon="@drawable/icon"
        android:label="@string/app_alias"
        android:theme="@style/AppTheme" >