Comment changer le thème de l'application en cliquant sur le bouton radio selon le choix des utilisateurs

Question

Comment changer le thème de l'application, la couleur de la barre de titre et la couleur d'arrière-plan pour toutes les activités en cliquant sur le bouton radio selon le choix des utilisateurs

Answer 1

//Pseudo code snippet is given 
    Let me assume the first page of android app might be having different set of radio as blue,green, red etc., 
each color might have defined in the style.xml with the required background,foreground,font color etc., 
    <?xml version="1.0" encoding="utf-8"?> 
    <RadioGroup xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical">  
    <RadioButton android:id="@+id/radio_blue"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:text="@string/pirates"  android:onClick="onRadioButtonClicked"/>  
    <RadioButton android:id="@+id/radio_red"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:text="@string/ninjas"  android:onClick="onRadioButtonClicked"/> 
    </RadioGroup> 

//In utility method 
    public static void savePreferences(String key, String value, Context context) { 

     SharedPreferences SharedPreferences = PreferenceManager 
       .getDefaultSharedPreferences(context); 
     SharedPreferences.Editor editor = SharedPreferences.edit(); 
     editor.putString(key, value); 
     editor.commit(); 
    } 
//in that page radiobuttononchange 
public void onRadioButtonClicked(View view) { 

// Is the button now checked? 

boolean checked = ((RadioButton) view).isChecked(); 

// Check which radio button was clicked 



switch(view.getId()) { 

case R.id.blue: 

if (checked) 
//store the value in sharedpreferences 
savePreferences("preference","blue",getcontext()); 
break; 

case R.id.red: 

if (checked) 
savePreferences("preference","red",getcontext()); 


break; 

Intent nextScreen = new Intent(

context, 

Form.class); 

startActivity(nextScreen); 


} 

} 

//In next activity 
//Oncreate 
SharedPreferences pref = PreferenceManager 
     .getDefaultSharedPreferences(this); 
String themeName = pref.getString("preference", "Theme1"); 
if (themeName.equals("blue")) { 
    setTheme(R.style.blue); 
} else if (themeName.equals("red")) { 
    setTheme(R.style.red); 
}..... 
setContentView(R.layout.activity_some_layout); 
}