Question

我扩展了PreferenceCategory类。它的工作原理除了Android属性“title”没有被传递并在屏幕上显示。任何帮助，将不胜感激。这是我的代码：

XML \ preferences_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:key="advanced_settings_screen"> 
    <apps.test.CustomPreferenceCategory
        android:key="advanced_general_settings_category"
        android:title="@string/general_category">

        <!-- Other Preferences Here -->

    </apps.test.CustomPreferenceCategory>
</PreferenceScreen>

CustomPreferenceCategory.java

public class CustomPreferenceCategory extends PreferenceCategory {

    public CustomPreferenceCategory(Context context, AttributeSet attrs) {
        super(context, attrs);
        Log.v("Constructor 1");
        this.setLayoutResource(R.layout.custom_preference_category);

            String titleAttribute = _attrs.getAttributeValue("http://schemas.android.com/apk/res/android", "title");
            if(titleAttribute.startsWith("@")){
                titleAttribute = _context.getString(Integer.parseInt(titleAttribute.replace("@", "")));
            }

        //What can I do here to populate the custom view with the title? I can't seem to figure this part out.

    }

    public CustomPreferenceCategory(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        Log.v("Constructor 2");
        this.setLayoutResource(R.layout.custom_preference_category);
    }

}

布局\ custom_preference_category.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/widget_frame"
    android:layout_height="wrap_content"
    android:layout_width="fill_parent"
    android:orientation="vertical">
    <TextView
        android:id="@+id/title"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:paddingBottom="5dp"
        android:paddingLeft="5dp"
        android:paddingTop="25dp"
        android:textAppearance="?android:attr/textAppearanceSmall"
        android:textStyle="bold"
        android:text="TEST" />          
    <ImageView
        android:id="@+id/category_divider"
        android:src="@drawable/preference_divider_normal"
        android:layout_height="2dip"  
        android:layout_width="fill_parent"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp" />
</LinearLayout>

我只想让属性“TITLE”通过并显示在屏幕上。我能够得到“标题”attirbute，但现在我似乎无法弄清楚如何将标题设置为自定义视图。任何人都可以帮忙吗？

由于

Answer 1

您需要使用AttributeSet来获取标题：

mTitle = attrs.getAttributeValue(androidns, "title");

安卓的地方是： private static final String androidns = "http://schemas.android.com/apk/res/android";

编辑：添加了有关使用标题的信息....

将您的布局添加到xml中的首选项：

android:layout="@layout/profile_preference_row"

现在你需要覆盖onBindView（android源代码下面的示例）......

@Override
protected void onBindView(View v) {
    super.onBindView(v);

 TextView textView = (TextView) view.findViewById(R.id.title); 
 if (textView != null) {
     textView.setText(getTitle());
  .......removed code.....

 }

如何扩展PreferenceCategory类

1 个答案: