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POChild class of SurfaceView crashed the application
 

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  1. POChild class of SurfaceView crashed the application
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    <p>I did simple application. I had added the new class TouchView:</p> <pre><code>package com.example.lookatme; import android.content.Context; import android.view.SurfaceView; public class TouchView extends SurfaceView{ public TouchView(Context context) { super(context); } } </code></pre> <p>... and added my new view at layout:</p> <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/rlMain" 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=".BlockerActivity" &gt; &lt;com.example.lookatme.TouchView android:id="@+id/tvPaint" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignTop="@+id/ivCenter" android:layout_marginTop="14dp" /&gt; &lt;ImageView android:id="@+id/ivCenter" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:src="@drawable/ic_launcher" android:contentDescription="TODO"/&gt; &lt;/RelativeLayout&gt; </code></pre> <p>At the start crashed application on the code setContentView(R.layout.activity_blocker) in activity. That i did wrong? The LogCat have same text:</p> <pre><code>10-23 18:02:03.442: W/dalvikvm(1964): threadid=1: thread exiting with uncaught exception (group=0xb57ef4f0) 10-23 18:02:03.442: E/AndroidRuntime(1964): FATAL EXCEPTION: main 10-23 18:02:03.442: E/AndroidRuntime(1964): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.lookatme/com.example.lookatme.BlockerActivity}: java.lang.ClassCastException: android.view.SurfaceView 10-23 18:02:03.442: E/AndroidRuntime(1964): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 10-23 18:02:03.442: E/AndroidRuntime(1964): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 10-23 18:02:03.442: E/AndroidRuntime(1964): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 10-23 18:02:03.442: E/AndroidRuntime(1964): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 10-23 18:02:03.442: E/AndroidRuntime(1964): at android.os.Handler.dispatchMessage(Handler.java:99) 10-23 18:02:03.442: E/AndroidRuntime(1964): at android.os.Looper.loop(Looper.java:130) 10-23 18:02:03.442: E/AndroidRuntime(1964): at android.app.ActivityThread.main(ActivityThread.java:3683) 10-23 18:02:03.442: E/AndroidRuntime(1964): at java.lang.reflect.Method.invokeNative(Native Method) 10-23 18:02:03.442: E/AndroidRuntime(1964): at java.lang.reflect.Method.invoke(Method.java:507) 10-23 18:02:03.442: E/AndroidRuntime(1964): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 10-23 18:02:03.442: E/AndroidRuntime(1964): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 10-23 18:02:03.442: E/AndroidRuntime(1964): at dalvik.system.NativeStart.main(Native Method) 10-23 18:02:03.442: E/AndroidRuntime(1964): Caused by: java.lang.ClassCastException: android.view.SurfaceView 10-23 18:02:03.442: E/AndroidRuntime(1964): at com.example.lookatme.BlockerActivity.onCreate(BlockerActivity.java:67) 10-23 18:02:03.442: E/AndroidRuntime(1964): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 10-23 18:02:03.442: E/AndroidRuntime(1964): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 10-23 18:02:03.442: E/AndroidRuntime(1964): ... 11 more 10-23 18:04:01.741: W/ActivityThread(2020): Application com.example.lookatme is waiting for the debugger on port 8100... </code></pre>
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    1. USsvd71
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    1. COIn your xml file, why are you putting `com.example.lookatme.TouchView` before `ImageView`?
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      1. POChild class of SurfaceView crashed the application
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    2. COI had think that sequence of view can help me and tried to resort two views. Decision is negative too. But when did deleted TouchView or when simple SurfaceView don't throw any exceptions.
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    3. COThat's right. From the error log, it says you have been casting the SurfaceView in an incorrect way.
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      1. USchinglun
 

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