Question

当我尝试预览我的偏好时，我收到此错误

渲染问题java.lang.UnsupportedOperationException at android.content.res.BridgeResources.obtainTypedArray（BridgeResources.java:472）在 com.grozeaion.www.gvicameraremotecontrol.MyListPreference。（MyListPreference.java:52） at java.lang.reflect.Constructor.newInstance（Constructor.java:526）在 android.preference.GenericInflater.createItem（GenericInflater.java:385）在 android.preference.GenericInflater.createItemFromTag（GenericInflater.java:432）在 android.preference.GenericInflater.rInflate（GenericInflater.java:483）在 android.preference.GenericInflater.rInflate（GenericInflater.java:495）在 android.preference.GenericInflater.inflate（GenericInflater.java:327）在 android.preference.Preference_Delegate.inflatePreference（Preference_Delegate.java:64）将堆栈复制到剪贴板

我创建了一个自定义列表首选项，如下所示

attr.xml我有

<declare-styleable name="MyListPreference">
<attr name="android:id" />
<attr name="android:key" />
<attr name="android:entries" />
<attr name="android:entryValues" />
<attr name="android:defaultValue" />
<attr name="itemIco" format="integer" />

我在preferences.xml中定义了控件

    <com.grozeaion.www.gvicameraremotecontrol.MyListPreference
    android:id="@+id/Dev2UseAs"
    android:icon="@drawable/off"
    android:key="Dev2UseAsK"
    android:summary="@string/trig_dev2m_s"
    android:title="@string/trig_dev2m_t"
    android:entries="@array/modeDevName"
    android:entryValues="@array/modeDevVal"
    android:defaultValue="0"
    custom:itemIco="@array/modeDevIco"
    />

数组modeDevIco看起来像这样

<array name="modeDevIco">
<item>@drawable/off</item>
<item>@drawable/camera</item>
<item>@drawable/flash</item>
<item>@drawable/split</item>

在我的自定义类

中

public MyListPreference(Context context, AttributeSet attrs) {
super(context, attrs);
setLayoutResource(R.layout.my_list_value_main);
this.context = context;
Resources resources = context.getResources();
preferences = PreferenceManager.getDefaultSharedPreferences(context);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.MyListPreference, 0, 0);
try {
    crtCtrlKey = a.getString(R.styleable.MyListPreference_android_key);
    itemTitle = resources.getStringArray(a.getResourceId(R.styleable.MyListPreference_android_entries, 0));
    itemVal = resources.getStringArray(a.getResourceId(R.styleable.MyListPreference_android_entryValues, 0));
    defVal = a.getString(R.styleable.MyEditText_android_defaultValue);
    int len = itemVal.length;
    itemIco = new int[len];
    TypedArray iDs = resources.obtainTypedArray(a.getResourceId(R.styleable.MyListPreference_itemIco, 0));//get ID's for icons
    for (int i = 0; i < len; i++) {
        itemIco[i] = iDs.getResourceId(i,0);
    }
    iDs.recycle();
} finally {
    a.recycle();
}

}

第52行

TypedArray iDs = resources.obtainTypedArray(a.getResourceId(R.styleable.MyListPreference_itemIco, 0));//get ID's for icons

如何修复此渲染问题？我猜这是因为我如何获得图标ID，但我不知道如何做到这一点

Answer 1

我有相同的渲染问题。但我正在努力获取色彩资源。我是通过isInEditMode（）来解决的。

private int[] getColorsById(int id){
    if(isInEditMode()){
        String[] s=mContext.getResources().getStringArray(id);
        int[] colors = new int[s.length];
        for (int j = 0; j < s.length; j++){
            colors[j] = Color.parseColor(s[j]);
        }
        return colors;
    }else{
        TypedArray typedArray=mContext.getResources().obtainTypedArray(id);
        int[] colors = new int[typedArray.length()];
        for (int j = 0; j < typedArray.length(); j++){
            colors[j] = typedArray.getColor(j,Color.BLACK);
        }
        typedArray.recycle();
        return colors;
    }
}

我希望它可以帮到你很多。或者你有更好的方法来解决它。只是评论我。

自定义列表首选项呈现问题

1 个答案: