错误膨胀内部类视图

本文介绍了错误膨胀内部类视图的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试扩展内部类视图并遇到错误扩展类"问题.我参考了这篇文章很有帮助，但我仍然不知道为什么我不能让它工作.

I'm trying to inflate an inner class view and getting the "error inflating class" problem. I've referenced this post which was helpful, but I'm still lost as to why I can't get this to work.

这是代码摘录、我的 XML 和 logcat.

Here is a code excerpt, my XML, and logcat.

我还注意到，当我清楚地拥有CupcakeMessageView(Context, AttributeSet)"时​​，logcat 声明了没有这样的方法异常".

Also I noticed that logcat states a "no such method exception" for "CupcakeMessageView(Context, AttributeSet) when I clearly have it.

谢谢大家！

public class CupcakeMessage extends Activity {

    class CupcakeMessageView extends View {
        private static final int TEXT_SIZE = 12;
        private static final int X_OFFSET = 15;

        private Paint mPaint;   

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

        public CupcakeMessageView(Context context, AttributeSet attrs) {
            super(context, attrs);
            mContext = context;
            ...
        }

        more class stuff... 
    }

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);        
        setContentView(R.layout.cupcake_message); 

        ...      
    }
}

这里是 XML

<RelativeLayout xmlns:android="http://schemas.android/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <view class="com.cmllc.zcc.CupcakeMessage$CupcakeMessageView"
        android:id="@+id/cupcake_message_view"
        android:screenOrientation="portrait"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    more views...

Logcat:

12-19 09:31:24.249: ERROR/AndroidRuntime(5435): FATAL EXCEPTION: main
12-19 09:31:24.249: ERROR/AndroidRuntime(5435): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.cmllc.zcc/com.cmllc.zcc.CupcakeMessage}: android.view.InflateException: Binary XML file line #7: Error inflating class com.cmllc.zcc.CupcakeMessage$CupcakeMessageView
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.os.Handler.dispatchMessage(Handler.java:99)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.os.Looper.loop(Looper.java:123)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.app.ActivityThread.main(ActivityThread.java:4627)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at java.lang.reflect.Method.invokeNative(Native Method)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at java.lang.reflect.Method.invoke(Method.java:521)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at dalvik.system.NativeStart.main(Native Method)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class com.cmllc.zcc.CupcakeMessage$CupcakeMessageView
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.view.LayoutInflater.createView(LayoutInflater.java:503)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:565)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.app.Activity.setContentView(Activity.java:1647)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at com.cmllc.zcc.CupcakeMessage.onCreate(CupcakeMessage.java:119)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     ... 11 more
12-19 09:31:24.249: ERROR/AndroidRuntime(5435): Caused by: java.lang.NoSuchMethodException: CupcakeMessageView(Context,AttributeSet)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at java.lang.Class.getMatchingConstructor(Class.java:660)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at java.lang.Class.getConstructor(Class.java:477)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     at android.view.LayoutInflater.createView(LayoutInflater.java:475)
12-19 09:31:24.249: ERROR/AndroidRuntime(5435):     ... 21 more

推荐答案

需要在内部类中添加public static.

public 因为它需要从外部可见.static 因为如果不是，你将需要 CupcakeMessage 来实例化它. public because it needs to be visible from outside. static because if not you will need to have CupcakeMessage to instantiate it.

同样，我建议在单独的类中执行 View.

All the same I would recommend doing the View in a separated class.

这篇关于错误膨胀内部类视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！