Kotlin bundle put enum

Grohden / BundleEnumExtension.kt

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import android.os.Bundle

// Dunno if there’s a better way to extend both bundle and intents, but

// you probably can extend intents in the same way

fun Bundle. putEnum ( key : String , enum : Enum < * >)

putString(key, enum.name)

>

inline fun < reified T : Enum < T >> Bundle. getEnum ( key : String ): T

return enumValueOf(getString(key))

>

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enum class KotlinEnum

KOTLIN_IS_LOVE

>

class MyClass : Fragment ()

companion object

private const val ENUM_KEY = » ENUM_KEY «

>

// . some fragment declaration code

fun newInstance ( ktEnum : KotlinEnum )

val args = Bundle ()

args.putEnum( ENUM_KEY , ktEnum)

// Both way works

val cEnum = args.getEnum( ENUM_KEY ) as KotlinEnum

val dEnum = args.getEnum< KotlinEnum >( ENUM_KEY )

>

>

Just a quick quip, but maybe this instead.

inline fun > Bundle.getEnum(key: String, default: T): T < val found = getString(key) return if (found == null) < default >else enumValueOf(found) > 

Then you if you can have e.g.:

. and the IDE doesn’t scream it’s lungs out 🙂

In case you want to use null instead of default you can also create an extension like this:

inline fun > Bundle.getEnum(key:String): T? < return getString(key)?.let < enumValueOf(it) > > 

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Android: How to put an Enum in a Bundle?

I know this is an old question, but I came with the same problem and I would like to share how I solved it. The key is what Miguel said: Enums are Serializable.

Bundle args = new Bundle(); args.putSerializable("arg", YourEnumType.ENUM_KEY_1); 

Solution 3 — Android

For completeness sake, this is a full example of how to put in and get back an enum from a bundle.

You can put the enum into a bundle:

bundle.putSerializable("enum_key", EnumType.ENUM_VALUE_1); 

EnumType enumType = (EnumType)bundle.getSerializable("enum_key"); 

Solution 4 — Android

companion object < enum class Mode  < MODE_REFERENCE, MODE_DOWNLOAD >> 

intent.putExtra(KEY_MODE, Mode.MODE_DOWNLOAD.name) 

when you net to get value:

mode = Mode.valueOf(intent.getStringExtra(KEY_MODE)) 

Solution 5 — Android

It may be better to pass it as string from myEnumValue.name() and restore it from YourEnums.valueOf(s), as otherwise the enum’s ordering must be preserved!

Solution 6 — Android

public enum DataType implements Parcleable < SIMPLE, COMPLEX; public static final Parcelable.CreatorDataType> CREATOR = new CreatorDataType>() < @Override public DataType[] newArray(int size) < return new DataType[size]; > @Override public DataType createFromParcel(Parcel source) < return DataType.values()[source.readInt()]; > >; @Override public int describeContents( ) < return 0; > @Override public void writeToParcel(Parcel dest, int flags) < dest.writeInt(this.ordinal()); > > 

Solution 7 — Android

enum class MyEnum NAME, SURNAME, GENDER > 

Put this enum in a Bundle:

Bundle().apply < putInt(MY_ENUM_KEY, MyEnum.ordinal) > 

val ordinal = getInt(MY_ENUM_KEY, 0) MyEnum.values()[ordinal] 

class MyFragment : Fragment() < enum class MyEnum  < NAME, SURNAME, GENDER >companion object < private const val MY_ENUM_KEY = "my_enum_key" fun newInstance(myEnum: MyEnum) = MyFragment().apply < arguments = Bundle().apply < putInt(MY_ENUM_KEY, myEnum.ordinal) >> > override fun onCreate(savedInstanceState: Bundle?) < super.onCreate(savedInstanceState) with(requireArguments()) < val ordinal = getInt(MY_ENUM_KEY, 0) val myEnum = MyEnum.values()[ordinal] > > > 

public final class MyFragment extends Fragment < private static final String MY_ENUM_KEY = "my_enum"; public enum MyEnum < NAME, SURNAME, GENDER >public final MyFragment newInstance(MyEnum myEnum) < Bundle bundle = new Bundle(); bundle.putInt(MY_ENUM_KEY, myEnum.ordinal()); MyFragment fragment = new MyFragment(); fragment.setArguments(bundle); return fragment; > public void onCreate(Bundle savedInstanceState) < super.onCreate(savedInstanceState); Bundle arguments = this.requireArguments(); int ordinal = arguments.getInt(MY_ENUM_KEY, 0); MyEnum myEnum = MyEnum.values()[ordinal]; > > 

Solution 8 — Android

Use bundle.putSerializable(String key, Serializable s) and bundle.getSerializable(String key):

enum Mode = < BASIC, ADVANCED >Mode m = Mode.BASIC; bundle.putSerializable("mode", m); . Mode m; m = bundle.getSerializable("mode"); 

Solution 9 — Android

I’ve created a Koltin extension:

fun Bundle.putEnum(key: String, enum: Enum) < this.putString( key , enum.name ) > inline fun reified T: Enum > Intent.getEnumExtra(key:String) : T < return enumValueOf( getStringExtra(key) ) > 

Bundle().also < it.putEnum( "KEY" , ENUM_CLAS.ITEM ) > 

intent?.getEnumExtra< ENUM_CLAS >( "KEY" )?.let<> 

Solution 10 — Android

For Intent you can use this way:

Intent : kotlin

val intent = Intent(context, SecondActivity::class.java) intent.putExtra("type", typeEnum.A) startActivity(intent) 

override fun onCreate(savedInstanceState: Bundle?) < super.onCreate(savedInstanceState) //. val type = (intent.extras?.get("type") as? typeEnum.Type?) > 

Solution 11 — Android

One thing to be aware of — if you are using bundle.putSerializable for a Bundle to be added to a notification, you could run into the following issue:

*** Uncaught remote exception! (Exceptions are not yet supported across processes.) java.lang.RuntimeException: Parcelable encountered ClassNotFoundException reading a Serializable object. . 

To get around this, you can do the following:

public enum MyEnum < TYPE_0(0), TYPE_1(1), TYPE_2(2); private final int code; private MyEnum(int code) < this.code = navigationOptionLabelResId; > public int getCode() < return code; > public static MyEnum fromCode(int code) < switch(code) < case 0: return TYPE_0; case 1: return TYPE_1; case 2: return TYPE_2; default: throw new RuntimeException( "Illegal TYPE_0: " + code); > > > 

Which can then be used like so:

// Put Bundle bundle = new Bundle(); bundle.putInt("key", MyEnum.TYPE_0.getCode()); // Get MyEnum myEnum = MyEnum.fromCode(bundle.getInt("key")); 

Solution 12 — Android

A simple way, assign integer value to enum

See the following example:

public enum MyEnum < TYPE_ONE(1), TYPE_TWO(2), TYPE_THREE(3); private int value; MyEnum(int value) < this.value = value; > public int getValue() < return value; > > 

Intent nextIntent = new Intent(CurrentActivity.this, NextActivity.class); nextIntent.putExtra("key_type", MyEnum.TYPE_ONE.getValue()); startActivity(nextIntent); 

Bundle mExtras = getIntent().getExtras(); int mType = 0; if (mExtras != null) < mType = mExtras.getInt("key_type", 0); > /* OR Intent mIntent = getIntent(); int mType = mIntent.getIntExtra("key_type", 0); */ if(mType == MyEnum.TYPE_ONE.getValue()) Toast.makeText(NextActivity.this, "TypeOne", Toast.LENGTH_SHORT).show(); else if(mType == MyEnum.TYPE_TWO.getValue()) Toast.makeText(NextActivity.this, "TypeTwo", Toast.LENGTH_SHORT).show(); else if(mType == MyEnum.TYPE_THREE.getValue()) Toast.makeText(NextActivity.this, "TypeThree", Toast.LENGTH_SHORT).show(); else Toast.makeText(NextActivity.this, "Wrong Key", Toast.LENGTH_SHORT).show(); 

Solution 13 — Android

I think convert enum to int (for normal enum) and then set on bundle was been easiest way. like this code for intent:

myIntent.PutExtra("Side", (int)PageType.Fornt); 

int type = Intent.GetIntExtra("Side",-1); if(type == (int)PageType.Fornt) < //To Do > 

but not work for all enum type!

Источник

saschpe / BundleUtils.kt

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package saschpe.alphaplus.utils

import android.os.Bundle

inline fun < reified T : Enum < T >> Bundle. getEnum ( key : String , default : T ) =

getInt(key). let < if (it >= 0 ) enumValues< T >()[it] else default >

fun < T : Enum < T >> Bundle. putEnum ( key : String , value : T ? ) =

putInt(key, value?.ordinal ? : — 1 )

package saschpe.alphaplus.utils import android.os.Bundle inline fun reified T : EnumT>> Bundle.getEnum(key: String, default: T) = getInt(key, -1).let < if (it >= 0) enumValuesT>()[it] else default > fun T : EnumT>> Bundle.putEnum(key: String, value: T?) = putInt(key, value?.ordinal ?: -1)

Should be with default value of -1 in getInt()

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