android - 调用 onSharedPreferenceChanged 后重启应用程序

Question

onSharedPreferenceChanged调用后如何重启应用？

ActivityPreferences.java:

[..]
public static class FragmentPreferences extends PreferenceFragment {
        private Context context;

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            context = getActivity();
            PreferenceManager.setDefaultValues(getActivity(), R.xml.preferences, false);
            addPreferencesFromResource(R.xml.preferences);

            final SharedPreferences sp = context.getSharedPreferences("PREFERENCE_KEY", Context.MODE_PRIVATE);
            SharedPreferences.OnSharedPreferenceChangeListener spChanged = new SharedPreferences.OnSharedPreferenceChangeListener() {
                @Override
                public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
                    context.finish();
                    startActivity(new Intent(ActivityPreferences.this, ActivityLogin.class));
                }
            };
        }
    }

这就是我的尝试，但我无法调用 finish()。

我想更改主题，如果列表首选项 s1_theme 已设置为亮/暗:

ActivityMain.java:

@Override
    protected void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        final Context context = getApplicationContext();
        final SharedPreferences sp = context.getSharedPreferences("PREFERENCE_KEY", Context.MODE_PRIVATE);
        if (sp.getString("s1_theme", "-1") == "light"){
                setTheme(R.style.AppTheme_BaseLight);
        } else {
            setTheme(R.style.AppTheme_BaseDark);
        }
        setContentView(R.layout.activity_main);
        [..]

Answer 1

尝试这段代码...这将重新启动 MainActivity...

                    this.finish();
                    Intent refresh = new Intent(this, MainActivity.class);
                    startActivity(refresh);

使用此代码在 MainActivity 中创建一个方法，并通过传递上下文从您要重新启动的 fragment 类中调用此方法...