在styles中写上
<!--白天主题-->
<style name="DayTheme" parent="AppTheme">
<item name="android:textColor">#525252</item>
<item name="android:background">#f7f7f7</item>
</style>
<!--夜间主题 #1e1e2a-->
<style name="NightTheme" parent="AppTheme">
<item name="android:textColor">#868a96</item>
<item name="android:background">#272727</item>
</style>
在oncreate方法上面写
private boolean isNightmode = false;
在mainactivity中的setContentView前面写
SharedPreferences sharedPreferences = getSharedPreferences("nightAndDay", Context.MODE_PRIVATE);
boolean isnight1 = sharedPreferences.getBoolean("isNightmode", false);
if (isnight1){
setTheme(R.style.NightTheme);
}else {
setTheme(R.style.DayTheme);
}
在setContentView下面写
int position = sharedPreferences.getInt("position", 0);
transaction.replace(R.id.lin_lay, fragments.get(position));
transaction.commit();
SharedPreferences.Editor edit = sharedPreferences.edit();
edit.putInt("position",0);
edit.commit()
在你的fragment类里写
private boolean isNightmode = false;
在你的button监听里面写
SharedPreferences sharedPreferences = getActivity().getSharedPreferences("nightAndDay", getActivity().MODE_PRIVATE);
SharedPreferences.Editor edit = sharedPreferences.edit();
boolean isnight1 = sharedPreferences.getBoolean("isNightmode", false);
if (!isnight1){
getActivity().setTheme(R.style.NightTheme);
edit.putBoolean("isNightmode",true);
edit.putInt("position",3);
edit.commit();
Toast.makeText(getActivity(), "1", Toast.LENGTH_SHORT).show();
}else{
getActivity().setTheme(R.style.DayTheme);
edit.putBoolean("isNightmode",false);
edit.putInt("position",3);
edit.commit();
Toast.makeText(getActivity(), "2", Toast.LENGTH_SHORT).show();
}
getActivity().recreate();