InflateException在自定义ImageView中

我在做一个旋转图像的示例，如this post。
我已经扩展ImageView，然后重写OnDraw并放入MainActivity中。但它解雇了“InflateException”。这里是我的示例代码：
MImageViewInflateException在自定义ImageView中

public class MImageView extends ImageView { 

    public MImageView(Context context) { 
     super(context); 
     // TODO Auto-generated constructor stub 
    } 

    @Override 
    protected void onDraw(Canvas canvas) { 
     // TODO Auto-generated method stub 
     canvas.save(); 
     canvas.rotate(45, 0, 0); 
     super.onDraw(canvas); 
     canvas.restore(); 
    } 
}

MainActivity

public class MainActivity extends Activity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     MImageView mImageView = (MImageView) findViewById(R.id.imageView1); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.main, menu); 
     return true; 
    } 

}

main_activity.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    tools:context=".MainActivity" > 



    <com.example.rotatetest.MImageView 
     android:id="@+id/imageView1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:src="@drawable/ic_launcher" /> 

</RelativeLayout>

清单

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.example.rotatetest" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk 
     android:minSdkVersion="8" 
     android:targetSdkVersion="17" /> 

    <application 
     android:allowBackup="true" 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme" > 
     <activity 
      android:name="com.example.rotatetest.MainActivity" 
      android:label="@string/app_name" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
    </application> 

</manifest>

Logcat

08-16 10:21:31.820: D/AndroidRuntime(5135): Shutting down VM 
08-16 10:21:31.820: W/dalvikvm(5135): threadid=1: thread exiting with uncaught exception (group=0x40ab4210) 
08-16 10:21:31.820: E/AndroidRuntime(5135): FATAL EXCEPTION: main 
08-16 10:21:31.820: E/AndroidRuntime(5135): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.rotatetest/com.example.rotatetest.MainActivity}: android.view.InflateException: Binary XML file line #13: Error inflating class com.example.rotatetest.MImageView 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2049) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2083) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.app.ActivityThread.access$600(ActivityThread.java:134) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1233) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.os.Handler.dispatchMessage(Handler.java:99) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.os.Looper.loop(Looper.java:137) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.app.ActivityThread.main(ActivityThread.java:4697) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at java.lang.reflect.Method.invokeNative(Native Method) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at java.lang.reflect.Method.invoke(Method.java:511) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at dalvik.system.NativeStart.main(Native Method) 
08-16 10:21:31.820: E/AndroidRuntime(5135): Caused by: android.view.InflateException: Binary XML file line #13: Error inflating class com.example.rotatetest.MImageView 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.view.LayoutInflater.createView(LayoutInflater.java:589) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:739) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.view.LayoutInflater.inflate(LayoutInflater.java:489) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:255) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.app.Activity.setContentView(Activity.java:1879) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at com.example.rotatetest.MainActivity.onCreate(MainActivity.java:15) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.app.Activity.performCreate(Activity.java:4539) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2013) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  ... 11 more 
08-16 10:21:31.820: E/AndroidRuntime(5135): Caused by: java.lang.NoSuchMethodException: <init> [class android.content.Context, interface android.util.AttributeSet] 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at java.lang.Class.getConstructorOrMethod(Class.java:460) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at java.lang.Class.getConstructor(Class.java:431) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  at android.view.LayoutInflater.createView(LayoutInflater.java:561) 
08-16 10:21:31.820: E/AndroidRuntime(5135):  ... 22 more

我做错了什么？

来源

2013-08-16 Dolphin

你可以显示一个调用堆栈吗？看起来你没有在你的自定义视图（匹配视图的）中创建所有的构造函数：（Context context，AttributeSet attrs）和（Context context，AttributeSet attrs，int defStyle）。 –

@ Denis'GeneralGDA'Gladkiy感谢您的回复，我更新了我的问题logcat – Dolphin

您尚未实现具有（类android.content.Context，接口android.util.AttributeSet）签名的构造函数。

来源

2013-08-16 02:25:30

它的工作，感谢您的帮助:) – Dolphin

请注意，重写构造函数（类android.content.Context，接口android.util.AttributeSet）应公开 –

您错过了MImageView（Context，Attributeset）的构造函数。只需添加它，错误将消失:)

来源

2013-08-16 02:26:12 Sushil

感谢relpy，那正是我的问题 – Dolphin

InflateException在自定义ImageView中

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