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@tobioyelekan
tobioyelekan / userViewModel.kt
Last active Jul 3, 2020
typical user view model
View userViewModel.kt
private val userId = MutableLiveData<String>()
val userDetails = userId.switchMap {
userRepo.getUser(it)
}
val userFullName = userDetails.map {
getFullName(it.firstName, it.lastName)
}
View MultiTextWatcher.java
/* We create an interface with one method */
public interface TextWatcherWithInstance {
void onTextChanged(EditText editText, CharSequence s, int start, int before, int count);
}
/* We create a custom class called MultiTextWatcher.
* And pass the interface here
*/
@msangel
msangel / ApiModule.java
Last active Jul 27, 2019 — forked from koesie10/ApiModule.java
Retrofit 1 error handling behaviour in Retrofit 2.3.0
View ApiModule.java
// Dagger 1 example
@Module(
complete = false,
library = true
)
public final class ApiModule {
@Provides
@Singleton
Retrofit provideRetrofit(Gson gson, Application app) {
return new Retrofit.Builder()
@Antarix
Antarix / FirebaseDataReceiver.java
Created Nov 21, 2016
Firebase Android Sample for managing notification
View FirebaseDataReceiver.java
import android.content.Context;
import android.content.Intent;
import android.support.v4.content.WakefulBroadcastReceiver;
import android.util.Log;
/**
* This is called whenever app receives notification
* in background/foreground state so you can
* apply logic for background task, but still Firebase notification
* will be shown in notification tray
@iChintanSoni
iChintanSoni / SharedPreferenceUtils.java
Last active Dec 5, 2018
Utility class for working with SharedPreferences
View SharedPreferenceUtils.java
import android.content.Context;
import android.content.SharedPreferences;
public class SharedPreferenceUtils {
private static SharedPreferenceUtils mSharedPreferenceUtils;
protected Context mContext;
private SharedPreferences mSharedPreferences;
private SharedPreferences.Editor mSharedPreferencesEditor;
private SharedPreferenceUtils(Context context) {
@lopspower
lopspower / README.md
Last active Dec 4, 2021
Hexadecimal color code for transparency
View README.md

Hexadecimal color code for transparency

Twitter

How to set transparency with hex value ?

For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.

Download This sample on Google Play Store

@mcelotti
mcelotti / android_forward_result
Last active Nov 2, 2021
Android FLAG_ACTIVITY_FORWARD_RESULT howto
View android_forward_result
Nav flow is: A => B => C => A with results from C
If you're using fragments please note that "onActivityResult" will be called according to where "startActivityForResult" is called (method "startActivityForResult" is available in both, activity and fragment)
ActivityA
startActivityForResult(intentB, 22);
ActivityB
intentC.addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
startActivity(intentC);
finish();
@cesarferreira
cesarferreira / RxJava.md
Last active May 29, 2021
Party tricks with RxJava, RxAndroid & Retrolambda
View RxJava.md

View Click

Instead of the verbose setOnClickListener:

RxView.clicks(submitButton).subscribe(o -> log("submit button clicked!"));

Filter even numbers

Observable
    .just(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
@yqritc
yqritc / gist:ccca77dc42f2364777e1
Last active Nov 30, 2021
Equal column spacing for Android RecyclerView GridLayoutManager by using custom ItemDecoration
View gist:ccca77dc42f2364777e1

ItemOffsetDecoration

public class ItemOffsetDecoration extends RecyclerView.ItemDecoration {

    private int mItemOffset;

    public ItemOffsetDecoration(int itemOffset) {
        mItemOffset = itemOffset;
    }