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When NOT to call super() method when overriding?
When I make my own Android custom class, I extend its native class. Then when I want to override the base method, I always call super() method, just like I always do in onCreate , onStop , etc.
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unsigned APK can not be installed
...on, you should read this article atleast once, i suggest: http://developer.android.com/guide/publishing/app-signing.html.
For your question, you can find the below line in above article:
All applications must be signed. The system will not install an application that is not signed.
so you ha...
I have an error: setOnItemClickListener cannot be used with a spinner, what is wrong?
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developer.android.com/guide/topics/ui/controls/…
– shkschneider
May 12 '15 at 13:32
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Programmatically set height on LayoutParams as density-independent pixels
...ou want to scale by the density scaling factor, just multiply by developer.android.com/reference/android/util/… which would also be the same as doing (size * metrics.densityDpi) / DisplayMetrics.DENSITY_DEFAULT.
– hackbod
May 11 '11 at 6:47
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Open soft keyboard programmatically
...activity> that you want to show the keyboard when the activity starts:
android:windowSoftInputMode="stateVisible"
This should cause the keyboard to become visible when the activity starts.
For more options, checkout the documentation.
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How to convert current date into string in java?
...time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
Android
Later versions of Android bundle implementations of the java.time classes.
For earlier Android (<26), the ThreeTenABP project adapts ThreeTen-Backport (mentioned above). See How to use ThreeTenABP….
The Thre...
Determine whether JSON is a JSONObject or JSONArray
...u have an array
tokenizer is able to return more types: http://developer.android.com/reference/org/json/JSONTokener.html#nextValue()
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Listview Scroll to the end of the list after updating the list
...ing post(Runnable) on the view, you ensure the Runnable code is run on the android UI thread. Generally do it this way unless you know you're already on the UI thread, or are ensuring that by some other means.
– Mason Lee
Feb 19 '14 at 0:14
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How to keep/exclude a particular package path when using proguard?
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Double asterisks (**) doesn't compile anymore (Android Studio 4.0)
– Daniel
Jun 24 at 22:49
2
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USB Debugging option greyed out
I have an LG-E405 phone running Android 2.3.6.
15 Answers
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