android - SwitchPreference振动

Question

我有一个 SwitchPreference，它应该处理手机是否振动。

我目前有这个:

 import android.os.Vibrator;
 ...

 public static final String PREF_CHANGE_THEME = "Changetheme";
 private SwitchPreference mSwitchPreference;
 private static SharedPreferences sPrefs;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    sPrefs = PreferenceManager.getDefaultSharedPreferences(this);
    mSwitchPreference = (SwitchPreference) findPreference(PREF_CHANGE_THEME);

我希望能够做到这一点:

sPrefs = PreferenceManager.getDefaultSharedPreferences(this);
        mSwitchPreference = (SwitchPreference)

//If enabled execute the following:
Vibrator v = (Vibrator) this.context.getSystemService(Context.VIBRATOR_SERVICE);
     // Vibrate for 500 milliseconds
     v.vibrate(500);
//Else: nothing

我应该使用的正确语法是什么？

Answer 1

在你的 preference xml 中:

<SwitchPreference
    android:key="Changetheme"
    android:title="vibrate"
    android:defaultValue="false" />

你的java代码应该是这样的:

public class SettingActivity extends PreferenceActivity implements onSharedPreferenceChangeListener {

    public SwitchPreference mSwitchPreference;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.sample);

        mSwitchPreference = (SwitchPreference) findPreference(PREF_CHANGE_THEME); //Preference Key
       mSwitchPreference.setOnPreferenceChangeListener(this);
    }

    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
        if (key.equals(PREF_CHANGE_THEME)) {
        boolean isEnable = sharedPreferences.getBoolean(PREF_CHANGE_THEME, false);
        //Do whatever you want here. This is an example.
        if (isEnable) {
            mSwitchPreference.setSummary("Enabled");
        } else {
            mSwitchPreference.setSummary("Disabled");
        }
    }

    @Override
    public void onResume() {
        super.onResume();

        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(TestPrefActivity.this);
        boolean isEnable = preferences.getBoolean(PREF_CHANGE_THEME, false);

        if (isEnable) {
            mSwitchPreference.setSummary("Enabled");
        } else {
            mSwitchPreference.setSummary("Disabled");
        }
    }
}