如何使用挂线preferenceChangeListener为QuietlyCoding NumberPicker？ [英] How to use setOnPreferenceChangeListener for QuietlyCoding NumberPicker?

问题描述

我要当从值 NumberPicker 更改为检测。我对这个code我的 preferenceActivity ：

 公共类主要preFS延长$ P $ {pferenceActivity    @覆盖
    保护无效的onCreate（捆绑savedInstanceState）{
        super.onCreate（savedInstanceState）;
        this.add preferencesFromResource（R.xml.main_ preferences）;
        this.find preference（SMSSentLimit）。西顿preferenceChangeListener（
            新在preferenceChangeListener（）{                @覆盖
                公共布尔在preferenceChange（preference preference，
                        对象为newValue）{
                    TrackerService.updateStats（Long.de code（newValue.toString（）））;
                    返回true;
                }
            }）;
        this.find preference（NumberPickerLimit）。西顿preferenceChangeListener（
            新的preference.On preferenceChangeListener（）{                @覆盖
                公共布尔在preferenceChange（preference preference，
                        对象为newValue）{
                    Log.i（关于preferenceChange，NumberPicker更改）;
                    Toast.makeText（getBaseContext（），CHANGEEEED !!!，
                        Toast.LENGTH_SHORT）.show（）;
                    返回true;
                }
            }）;
    }
}
 

第二个（找到preference（NumberPickerLimit））是 NumberPicker ，它是从来不叫，如果我将其更改为上preferenceClickListener 它的工作原理，但是当我点击preference，而不是当我改变了我的价值发现。

Acording源$ C ​​$ C应该叫：

 公共无效的onClick（DialogInterface对话，诠释它）{
        切换（这）{
            案例DialogInterface.BUTTON_POSITIVE：
                saveValue（mPicker.getCurrent（））;
                打破;
            默认：
                打破;
        }
    }私人无效saveValue（INT VAL）{
    。getEditor（）putInt（getKey（），val）的.commit（）;
    notifyChanged（）;
}
 

What's发生了什么？它是一个错误吗？

修改
这里是我的XML：

 ＆LT; com.michaelnovakjr.numberpicker.NumberPicker preference
            机器人：键=NumberPickerLimit
            机器人：标题=@字符串/ NumberPickerTitle
            机器人：总结=@字符串/ NumberPickerSummary
            选择器：设置defaultValue =1
            选择器：startRange =1
            选择器：endRange =31/＆GT;
 

解决方案

您必须自己打电话的听众。取而代之的 notifyChanged（），试试 callChangeListener（VAL）因为在这里看到：

<一个href=\"https://$c$c.google.com/p/standings/source/browse/trunk/trunk/com.michaelnovakjr.numberpicker.android/src/com/michaelnovakjr/numberpicker/NumberPicker$p$pference.java?r=8\"相对=nofollow> NumberPicker preference

I want to detect when the value from the NumberPicker is changed. I have this code on my PreferenceActivity:

public class MainPrefs extends PreferenceActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.addPreferencesFromResource(R.xml.main_preferences);
        this.findPreference("SMSSentLimit").setOnPreferenceChangeListener(
            new OnPreferenceChangeListener() {

                @Override
                public boolean onPreferenceChange(Preference preference,
                        Object newValue) {
                    TrackerService.updateStats(Long.decode(newValue.toString()));
                    return true;
                }
            });
        this.findPreference("NumberPickerLimit").setOnPreferenceChangeListener(
            new Preference.OnPreferenceChangeListener() {

                @Override
                public boolean onPreferenceChange(Preference preference,
                        Object newValue) {
                    Log.i("onPreferenceChange", "NumberPicker Changed");
                    Toast.makeText(getBaseContext(), "CHANGEEEED !!!",
                        Toast.LENGTH_SHORT).show();
                    return true;
                }
            });
    }
}

The second one (findPreference("NumberPickerLimit")) is the NumberPicker and it is never called, if I change it to onPreferenceClickListener it works but I detect when I click the preference instead when I change the value.

Acording to source code it should be called:

public void onClick(DialogInterface dialog, int which) {
        switch (which) {
            case DialogInterface.BUTTON_POSITIVE:
                saveValue(mPicker.getCurrent());
                break;
            default:
                break;
        }
    }

private void saveValue(int val) {
    getEditor().putInt(getKey(), val).commit();
    notifyChanged();
}

What´s happening? Is it a bug?

EDIT Here is my XML:

<com.michaelnovakjr.numberpicker.NumberPickerPreference
            android:key="NumberPickerLimit"
            android:title="@string/NumberPickerTitle"
            android:summary="@string/NumberPickerSummary"
            picker:defaultValue="1"
            picker:startRange="1"
            picker:endRange="31" />

解决方案

You have to call the listener yourself. Instead of notifyChanged(), try callChangeListener(val) as seen here:

NumberPickerPreference

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