Question

我有这个CheckBoxPreference

CheckBoxPreference sendToEmailPref = new CheckBoxPreference(this);
sendToEmailPref.setTitle("Send To Email");
sendToEmailPref.setDependency("emailList");

我想设置它对一个键“emailList”的依赖 emailList是一个自定义构建首选项，它将电子邮件收件人存储为字符串。

但是，我收到此错误

Caused by: java.lang.IllegalStateException: Dependency not found.....

Answer 1

调完addPreference后应该调用setDependency 它对我很有用！

Answer 2

将你的.setDependency（）放在onCreate中的setPreferenceScreen（）之后。它应该工作。

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

    setPreferenceScreen(createPreferenceHierarchy());
    getPreferenceScreen().findPreference("_key_of_depend_to_").setDependency("emailList");
}

Answer 3

final CheckBoxPreference sendImageToEmail = (CheckBoxPreference) findPreference("send_image_to_email");
listener = new SharedPreferences.OnSharedPreferenceChangeListener() {
@Override
public void onSharedPreferenceChanged(
    SharedPreferences sharedPreferences, String key) {
        if (key.equals("emailList")) {
            String emails = sharedPreferences
                    .getString("emailList", "");
            if (emails.equals("")) {
                sendImageToEmail.setChecked(false);

我用OnSharedPreferenceChangeListener来做。

Answer 4

确保在之前添加了一个带有“emailList”键的首选项，并将依赖项添加到CheckBoxPreference。我已经为我工作了（在我的PreferenceFragment中）。

Context context = getActivity(); PreferenceScreen root = getPreferenceManager.createPreferenceScreen(context); setPreferenceScreen(root); CustomPreference customPref = new CustomPreference(context); customPref.setTitle("My Custom Preference"); customPref.setKey("emailList"); root.addPreference(customPref); CheckBoxPreference sendToEmailPref = new CheckBoxPreference(context); sendToEmailPref.setTitle("Send To Email"); root.addPreference(sendToEmailPref); sendToEmailPref.setDependency("emailList");

Answer 5

您应在sendToEmailPref.setDependency("emailList")之后写setPreferenceScreen(yourScreen) 假设我写：

 override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
        val context = preferenceManager.context
        val screen = preferenceManager.createPreferenceScreen(context)
        ...

并具有switchPreference：

val mySwitchPreference = SwitchPreference(context)
mySwitchPreference.key = "my_switch_preference"
screen.addPreference(mySwitchPreference )
...

，并有一个SeekBarPreference，我希望依赖于“ mySwitchPreference”。如果开关为“ ON”，则启用搜索栏，否则禁用搜索栏：

val mySeekBarPreference = SeekBarPreference(context)
mySeekBarPreference.key = "my_seekbar_preference"
screen.addPreference(mySeekBarPreference)
...



preferenceScreen = screen
mySeekBarPreference.dependency = mySwitchPreference.key

如果您确实尝试在设置之前为seekBarPrefernece设置依赖项屏幕作为PreferenceScreen，它会向您显示此错误：

java.lang.IllegalStateException: Dependency "my_switch_preference" not found for preference "my_seekbar_preference"

Answer 6

您可以尝试以下代码： -

private static final String PARENT_CHECKBOX_PREFERENCE = "parent_checkbox_preference";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        PreferenceScreen root = getPreferenceManager().createPreferenceScreen(this);
        setPreferenceScreen(root);
        populatePreferenceHierarchy(root);
    }

private void populatePreferenceHierarchy(PreferenceScreen pScreenRoot) {
        // Preference attributes
        PreferenceCategory prefAttrsCat = new PreferenceCategory(this);
        prefAttrsCat.setTitle("preference_attributes");
        pScreenRoot.addPreference(prefAttrsCat);

        // Visual parent toggle preference
        CheckBoxPreference parentCheckBoxPref = new CheckBoxPreference(this);
        parentCheckBoxPref.setKey(PARENT_CHECKBOX_PREFERENCE);
        parentCheckBoxPref.setTitle("title_parent_preference");
        parentCheckBoxPref.setSummary("summary_parent_preference");
        prefAttrsCat.addPreference(parentCheckBoxPref);


        // Visual child toggle preference
        // See res/values/attrs.xml for the <declare-styleable> that defines TogglePrefAttrs.
        TypedArray typeA = obtainStyledAttributes(R.styleable.TogglePrefAttrs);
        CheckBoxPreference childCheckBoxPref = new CheckBoxPreference(this);
        childCheckBoxPref.setKey("child_checkbox_preference");
        childCheckBoxPref.setTitle("title_child_preference");
        childCheckBoxPref.setSummary("summary_child_preference");
        childCheckBoxPref.setLayoutResource(typeA.getResourceId(R.styleable.TogglePrefAttrs_android_preferenceLayoutChild, 0));
        prefAttrsCat.addPreference(childCheckBoxPref);
        childCheckBoxPref.setDependency(PARENT_CHECKBOX_PREFERENCE);

        typeA.recycle();
}

找不到CheckBoxPreference依赖项错误

6 个答案: