android - 关闭应用程序后如何将开关小部件保持在关闭位置

Question

我正在尝试在 Android 中实现 switch 小部件。但是，每当我将开关设置为“关闭”位置并关闭并重新打开我的应用程序时，它都会再次将自身设置为“打开”值。我怎样才能让它根据用户自行设置。

Answer 1

我的设置屏幕，java

 toggleCamera = (ToggleButton) findViewById(R.id.toggleCamera);
            Boolean b = AppTypeDetails.getInstance(SettingScreen.this).getToggleStatus();
            toggleCamera.setChecked(b);
            toggleCamera.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    if (toggleCamera.isChecked()) {
                        AppTypeDetails.getInstance(SettingScreen.this).setToggleStatus(true);
                    } else {
                        AppTypeDetails.getInstance(SettingScreen.this).setToggleStatus(false);
                    }
                }
            });

AppTypeDetails.java

import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;

public class AppTypeDetails {

    private SharedPreferences sh;

    private AppTypeDetails() {

    }

    private AppTypeDetails(Context mContext) {
        sh = PreferenceManager.getDefaultSharedPreferences(mContext);
    }

    private static AppTypeDetails instance = null;

    public synchronized static AppTypeDetails getInstance(Context mContext) {
        if (instance == null) {
            instance = new AppTypeDetails(mContext);
        }
        return instance;
    }



    // get toggle Status
    public boolean getToggleStatus() {
        return sh.getBoolean("ToggleButton", false);
    }

    public void setToggleStatus(Boolean toggle) {
        sh.edit().putBoolean("ToggleButton", toggle).commit();
    }



    public void clear() {
        sh.edit().clear().commit();
    }

}

这将成功地工作......