Question

我正在开发一款Android应用。在我的应用程序中，我需要创建颜色选择器。美丽的颜色选择器。所以我正在使用这个选择器 - https://android-arsenal.com/details/1/4401。我正在做的是按钮的点击监听器上的简单，开放的颜色选择器。但是当我点击按钮时抛出错误。

这是在活动中打开选择器的代码

private void openCaptionTfColorPicker()
    {
        new ColorDialog.Builder(this)
                .setColorShape(ColorShape.CIRCLE) //CIRCLE or SQUARE
                .setColorChoices(R.array.color_choices) //an array of colors
                .setSelectedColor(Color.GREEN) //the checked color
                .setTag(TAG_TF_COLOR_PICKER) // tags can be useful when multiple components use the picker within an activity
                .show();
    }

我的活动实现了ColorDialog.OnColorSelectedListener

这是我在array.xml中的color_choices数组

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string-array name="color_choices">
        <item>@android:color/black</item>
        <item>@android:color/white</item>
    </string-array>
</resources>

当我点击按钮

时，这是logcat中的错误

致命的例外：主要过程：memegenerator.waiyanhein.com.memegenerator，PID：17860 java.lang.NullPointerException：尝试调用虚方法＆＃39; int java.util.ArrayList.size（）＆＃39;在null对象引用上在 memegenerator.waiyanhein.com.adapter.InstalledTemplatesAdapter.getItemCount（InstalledTemplatesAdapter.java:92）在 android.support.v7.widget.RecyclerView.dispatchLayoutStep1（RecyclerView.java:2938）在 android.support.v7.widget.RecyclerView.dispatchLayout（RecyclerView.java:2904）在 android.support.v7.widget.RecyclerView.onLayout（RecyclerView.java:3283）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1743）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1586）在android.widget.LinearLayout.onLayout（LinearLayout.java:1495）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.support.v4.view.ViewPager.onLayout（ViewPager.java:1695）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.RelativeLayout.onLayout（RelativeLayout.java:1079）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）在android.widget.FrameLayout.onLayout（FrameLayout.java:273）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1743）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1586）在android.widget.LinearLayout.onLayout（LinearLayout.java:1495）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）在android.widget.FrameLayout.onLayout（FrameLayout.java:273）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1743）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1586）在android.widget.LinearLayout.onLayout（LinearLayout.java:1495）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）在android.widget.FrameLayout.onLayout（FrameLayout.java:273）在 com.android.internal.policy.PhoneWindow $ DecorView.onLayout（PhoneWindow.java:2678）在android.view.View.layout（View.java:16636）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.view.ViewRootImpl.performLayout（ViewRootImpl.java:2171）在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:1931）在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1107）在 android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:6013）在 android.view.Choreographer $ CallbackRecord.run（Choreographer.java:858）在android.view.Choreographer.doCallbacks（Choreographer.java:670）在android.view.Choreographer.doFrame（Choreographer.java:606）在 android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:844）在android.os.Handler.handleCallback（Handler.java:739）在android.os.Handler.dispatchMessage（Handler.java:95）在android.os.Looper.loop（Looper.java:148）在android.app.ActivityThread.main（ActivityThread.java:5417） at java.lang.reflect.Method.invoke（Native Method）在 com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:726）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:616）

我能想到的是，我的色彩资源阵列出了问题。为什么会抛出这个错误？

无法为颜色首选项选择器Android

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