Question

提示请尽可能阅读有关创建自定义布局列表首选项（背景和布局顶部面板，面板按钮）的信息。 Met - 仅用于自定义行的示例。对不起 - 谷歌翻译。

Answer 1

您无法为ListPreference创建自定义布局。但是，您可以创建自己的自定义DialogPreference，并将其设置为您想要的任何内容。

例如，here is a DialogPreference that uses a TimePicker to allow the user to choose a time。 Here is a DialogPreference that allows the user to choose a color

Answer 2

在 preference.xml 文件中，您可以通过类的全名来引用自定义ListPreference，即 com.example.MyPreference

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
    android:key="pref_wifi_key"
    android:title="@string/settings">
    <ListPreference
        android:key="pref_wifi_remove"
        android:title="@string/remove_wifi"/>
    <com.example.MyPreference
    android:title="@string/add_wifi"/>
</PreferenceScreen>

然后你的班级 MyPreference 应该是这样的：

import android.preference.ListPreference;

public class MyPreference extends ListPreference  {

    Context context;

    public MyPreference(Context context, AttributeSet attrs) {
        this.context = context;
        setDialogLayoutResource(R.layout.yourLayout); //inherited from DialogPreference
        setEntries(new CharSequence[] {"one", "two"});
        setEntryValues(new CharSequence[] {"item1", "item2"});
    }
    protected void onDialogClosed(boolean positiveResult) {
    Toast.makeText(context, "item_selected",
                       Toast.LENGTH_SHORT).show();
    }
}

Answer 3

在您的首选项xml文件
中
＆LT; your.domain.CustomListPreference ... /＆GT;

CustomListPreference.java

class CustomListPreference extends ListPreference {

mListAdapter = new your_custom_list_adapter();
private int mClickedDialogEntryIndex;
public CustomListPreference(Context context, AttributeSet attrs) {
    super(context, attrs);
}

public CustomListPreference(Context context) {
    super(context);
}

@Override
protected void onPrepareDialogBuilder(Builder builder) {
      mClickedDialogEntryIndex = findIndexOfValue(getValue());
      builder.setSingleChoiceItems(mListAdapter, mClickedDialogEntryIndex,
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    if (mClickedDialogEntryIndex != which) {
                        mClickedDialogEntryIndex = which;
                        CustomListPreference.this.notifyChanged();
                    }
                    CustomListPreference.this.onClick(dialog, DialogInterface.BUTTON_POSITIVE);
                    dialog.dismiss();
                }
            });
      builder.setPositiveButton(null, null);
}

@Override
protected void onDialogClosed(boolean positiveResult) {
    CharSequence[] entryValues = getEntryValues();
    if (positiveResult && mClickedDialogEntryIndex >= 0 && entryValues != null) {
        String value = entryValues[mClickedDialogEntryIndex].toString();
        if (callChangeListener(value)) {
            setValue(value);
        }
    }
}

}

自定义布局ListPreference

3 个答案: