Android：膨胀布局时出现带有 InvocationTargetException 的 StackOverFlowError

Question

首先，对不起我的英语。膨胀布局时我有一个问题：

我有一个自定义视图，它从一个名为 ButtonHelp 的 LinearLayout 扩展而来。我在名为 LoadingActivity 的布局上使用该视图。我的以下代码在所有设备和模拟器上都能完美运行，除了带有 QVGA 屏幕的设备和模拟器，如三星 Galaxy Y，并出现以下错误：

FATAL EXCEPTION: main  
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myapp/com.myapp.LoadingActivity}: android.view.InflateException: Binary XML file line #45: Error inflating class com.myapp.customviews.ButtonHelp  
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)  
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)  
    at android.app.ActivityThread.access$1500(ActivityThread.java:117)  
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)  
    at android.os.Handler.dispatchMessage(Handler.java:99)  
    at android.os.Looper.loop(Looper.java:123)
    at android.app.ActivityThread.main(ActivityThread.java:3683)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:507)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
    at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #45: Error inflating class com.myapp.customviews.ButtonHelp
    at android.view.LayoutInflater.createView(LayoutInflater.java:518)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:570)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:623)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207)
    at android.app.Activity.setContentView(Activity.java:1657)
    at com.myapp.LoadingActivity.onCreate(LoadingActivity.java:45)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
    ... 11 more
Caused by: java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Constructor.constructNative(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:415)
    at android.view.LayoutInflater.createView(LayoutInflater.java:505)
    ... 21 more
Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class android.widget.ImageButton
    at android.view.LayoutInflater.createView(LayoutInflater.java:518)
    at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:568)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:623)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
    at com.myapp.customviews.ButtonHelp.initLayout(ButtonHelp.java:29)
    at com.myapp.customviews.ButtonHelp.<init>(ButtonHelp.java:17)
    ... 24 more
Caused by: java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Constructor.constructNative(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:415)
    at android.view.LayoutInflater.createView(LayoutInflater.java:505)
    ... 32 more
Caused by: java.lang.StackOverflowError
    at android.util.LongSparseArray.get(LongSparseArray.java:79)
    at android.content.res.Resources.getCachedDrawable(Resources.java:1746)
    at android.content.res.Resources.loadDrawable(Resources.java:1664)
    at android.content.res.Resources.getDrawable(Resources.java:581)
    at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:162)
    at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:787)
    at android.graphics.drawable.Drawable.createFromXml(Drawable.java:728)
    at android.content.res.Resources.loadDrawable(Resources.java:1694)
    at android.content.res.Resources.getDrawable(Resources.java:581)
    at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:162)
    at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.

问题是，我不知道这条线：

Caused by: java.lang.StackOverflowError
    at android.util.LongSparseArray.get(LongSparseArray.java:79)

为什么会发生在 QVGA 模拟器/设备上？

仅供参考：

• 我只有 320x480 屏幕的图像资源。

• ButtonHelp 布局：

  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:orientation="vertical" >
  
  <ImageButton
      android:id="@+id/btnhelp_help"
      android:layout_width="40dp"
      android:layout_height="40dp"
      android:layout_marginLeft="5dp"
      android:layout_marginRight="5dp"
      android:layout_marginTop="5dp"
      android:background="@drawable/loading_button_help"
      android:src="@drawable/loading_icon_help" />
  </LinearLayout>
  

• 按钮帮助代码：

  public class ButtonHelp extends LinearLayout {
      private ImageButton mHelp;
  
      public ButtonHelp(Context context, AttributeSet attrs) {
          super(context, attrs);
          initLayout();
          initControls();
      }
  
      public ButtonHelp(Context context) {
          super(context);
          initLayout();
          initControls();
      }
  
      private void initLayout() {
          LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
          inflater.inflate(R.layout.btn_help, this);
      }
  
      private void initControls() {
          mHelp = (ImageButton) findViewById(R.id.btnhelp_help);
      }
  
      public void setOnClickListener(View.OnClickListener listener) {
          mHelp.setOnClickListener(listener);
      }
  }
  

• ButtonHelp用于LoadingActivity：

  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/RelativeLayout1"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:background="@drawable/loading_background"
      android:orientation="vertical" >
  
  ...
  
      <com.myapp.customviews.ButtonHelp
          android:id="@+id/loading_help"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_alignParentRight="true"
          android:layout_alignParentTop="true" />
  
  ...
  
  </RelativeLayout>
  

• 当我删除ButtonHelp时，创建布局时仍然出现错误，就像上面的logcat一样。

我已经搜索了另一个 SO 问题，但仍然没有针对此案例的解决方案或解释。

非常感谢！

---

更新：

根据要求，以下是loading_button_help 的代码：

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_window_focused="false" android:state_enabled="true"
        android:drawable="@drawable/loading_button_help" /> <!-- Normal -->

    <item android:state_window_focused="false" android:state_enabled="false"
        android:drawable="@drawable/loading_button_help" /> <!--  Normal disable -->

    <item android:state_pressed="true" 
        android:drawable="@drawable/loading_button_help_press" /> <!-- pressed -->

    <item android:state_focused="true" android:state_enabled="true"
        android:drawable="@drawable/loading_button_help" /> <!-- selected -->

    <item android:state_enabled="true"
        android:drawable="@drawable/loading_button_help" /> <!-- normal -->

    <item android:state_focused="true"
        android:drawable="@drawable/loading_button_help" /> <!-- normal disable focused -->

    <item
        android:drawable="@drawable/loading_button_help" /> <!-- normal disable -->
</selector>

而loading_icon_help 只是一张 PNG 图像。

Answer 1

在 loading_button_help.xml 你使用@drawable/loading_button_help？我认为你有循环参考。尝试重命名您的 xml 或图像文件。