我想用SwithCompat动态更改我的应用程序的主题,所以我实现了这个:
public class SettingsActivity extends AppCompatActivity {
private final static int THEME_LIGHT = 2;
private final static int THEME_DARK = 1;
@BindView(R.id.summary)
TextView summary;
@BindView(R.id.themeModeSwitchCompat)
SwitchCompat themeMode;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
SharedPreferences sharedPreferences = getSharedPreferences("VALUES", MODE_PRIVATE);
int theme = sharedPreferences.getInt("THEME", 2);
switch (theme) {
case 1:
setTheme(R.style.CustomStyle_DarkTheme);
break;
case 2:
setTheme(R.style.CustomStyle_LightTheme);
break;
}
super.onCreate(savedInstanceState);
setContentView(R.layout.settings_activity);
ButterKnife.bind(this);
themeMode.setOnCheckedChangeListener((buttonView, isChecked) -> {
if (isChecked) {
summary.setText(getResources().getString(R.string.night_mode_on_summary));
sharedPreferences.edit().putInt("THEME",1).apply();
} else {
summary.setText(getResources().getString(R.string.night_mode_off_summary));
sharedPreferences.edit().putInt("THEME",2).apply();
}
});
}}
我想知道为什么主题不会改变,以及如何更正我的代码以获得一个使用switchCompat动态更改的主题
在xml中创建两个不同的主题。您甚至可以创建两个不同的xml文件。像RedTheme.xml和GreenTheme.xml。创建风格时不要忘记将父设置为“AppTheme”。
<resources>
<style name="RedTheme" parent="AppTheme">
<item name="colorPrimary">@color/colorRed</item>
<item name="colorPrimaryDark">@color/colorGreen</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="toolbarNavigationButtonStyle">@style/Toolbar.Button.Navigation.REd</item>
</style>
现在调用setOnCheckedChangeListener上的setTheme()方法,这是在运行时更改主题的本机方法。
if(isChecked)
{
setTheme(R.style.RedTheme);
}
else{
setTheme(R.style.GreenTheme);
}
重要说明:在基本活动中创建此方法。应用主题后,您必须重新创建活动以反映更改。
试试这个 :
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
initViews()
}
private void initViews() {
SharedPreferences sharedPreferences = getSharedPreferences("VALUES", MODE_PRIVATE);
int theme = sharedPreferences.getInt("THEME", 2);
switch (theme) {
case 1:
setTheme(R.style.CustomStyle_DarkTheme);
break;
case 2:
setTheme(R.style.CustomStyle_LightTheme);
break;
}
super.onCreate(savedInstanceState);
setContentView(R.layout.settings_activity);
ButterKnife.bind(this);
themeMode.setOnCheckedChangeListener(null);
switch (theme) {
case 1:
themeMode.setChecked(true);
break;
case 2:
themeMode.setChecked(false);
break;
}
themeMode.setOnCheckedChangeListener((buttonView, isChecked) -> {
if (isChecked) {
summary.setText(getResources().getString(R.string.night_mode_on_summary));
sharedPreferences.edit().putInt("THEME", 1).apply();
//Call the onCreate here again to apply the theme again.
initViews();
} else {
summary.setText(getResources().getString(R.string.night_mode_off_summary));
sharedPreferences.edit().putInt("THEME", 2).apply();
//Call the onCreate here again to apply the theme again.
initViews();
}
});
}