Language Convertor

ActivityMain.xml
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<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/tvMessage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        android:textSize="24dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.2"
        />


    <Button
        android:id="@+id/actionEng"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="English"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.6"
        />

    <Button
        android:id="@+id/actionHi"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hindi"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.8"/>

</android.support.constraint.ConstraintLayout>

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MainActivity.java

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public class MainActivity extends AppCompatActivity implements View.OnClickListener{

    TextView tvMessage;
    Button actionEng, actionHi;

    AppPrefs prefs;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        prefs = new AppPrefs(this);

        tvMessage = (TextView) findViewById(R.id.tvMessage);
        actionEng = (Button)findViewById(R.id.actionEng);
        actionHi = (Button)findViewById(R.id.actionHi);


        actionEng.setOnClickListener(this);
        actionHi.setOnClickListener(this);

        tvMessage.setText(getResources().getString(R.string.txt_1));

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.actionEng:
            {
                setEnglish();
            }
            break;
            case R.id.actionHi:
            {
                setHindi();
            }
            break;

        }

    }

    private void setEnglish(){

        String languageToLoad  = "en"; // your language
        Locale locale = new Locale(languageToLoad);
        Locale.setDefault(locale);
        Configuration config = new Configuration();
        config.locale = locale;
        getBaseContext().getResources().updateConfiguration(config,
                getBaseContext().getResources().getDisplayMetrics());
        recreate();
    }

    private void setHindi(){

        String languageToLoad  = "hi"; // your language
        Locale locale = new Locale(languageToLoad);
        Locale.setDefault(locale);
        Configuration config = new Configuration();
        config.locale = locale;
        getBaseContext().getResources().updateConfiguration(config,
                getBaseContext().getResources().getDisplayMetrics());
        recreate();
    }
}

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