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POHow to get parent id on Android?
 

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  1. POHow to get parent id on Android?
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    <p>I've tried to get parent id of RadioButton (id of RadioGroup) by</p> <pre><code>RadioGroup rg = (RadioGroup) arg0.getParent(); </code></pre> <p>but it failed. Following construction</p> <pre><code>RadioGroup rg = (RadioGroup) findViewById(R.id.radiogr); </code></pre> <p>works well. How can I get parent id at runtime?</p> <p>fails with these logs:</p> <pre><code>12-26 17:11:05.205: E/AndroidRuntime(912): FATAL EXCEPTION: main 12-26 17:11:05.205: E/AndroidRuntime(912): java.lang.ClassCastException: android.widget.LinearLayout 12-26 17:11:05.205: E/AndroidRuntime(912): at com.letmedraw.shopcart.ShopCartActivity.onCheckedChanged(ShopCartActivity.java:96) 12-26 17:11:05.205: E/AndroidRuntime(912): at android.widget.RadioGroup.setCheckedId(RadioGroup.java:172) 12-26 17:11:05.205: E/AndroidRuntime(912): at android.widget.RadioGroup.access$600(RadioGroup.java:52) 12-26 17:11:05.205: E/AndroidRuntime(912): at android.widget.RadioGroup$CheckedStateTracker.onCheckedChanged(RadioGroup.java:342) 12-26 17:11:05.205: E/AndroidRuntime(912): at android.widget.CompoundButton.setChecked(CompoundButton.java:127) 12-26 17:11:05.205: E/AndroidRuntime(912): at android.widget.CompoundButton.toggle(CompoundButton.java:86) 12-26 17:11:05.205: E/AndroidRuntime(912): at android.widget.RadioButton.toggle(RadioButton.java:69) 12-26 17:11:05.205: E/AndroidRuntime(912): at android.widget.CompoundButton.performClick(CompoundButton.java:98) 12-26 17:11:05.205: E/AndroidRuntime(912): at android.view.View$PerformClick.run(View.java:8816) 12-26 17:11:05.205: E/AndroidRuntime(912): at android.os.Handler.handleCallback(Handler.java:587) 12-26 17:11:05.205: E/AndroidRuntime(912): at android.os.Handler.dispatchMessage(Handler.java:92) 12-26 17:11:05.205: E/AndroidRuntime(912): at android.os.Looper.loop(Looper.java:123) 12-26 17:11:05.205: E/AndroidRuntime(912): at android.app.ActivityThread.main(ActivityThread.java:4627) 12-26 17:11:05.205: E/AndroidRuntime(912): at java.lang.reflect.Method.invokeNative(Native Method) 12-26 17:11:05.205: E/AndroidRuntime(912): at java.lang.reflect.Method.invoke(Method.java:521) 12-26 17:11:05.205: E/AndroidRuntime(912): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 12-26 17:11:05.205: E/AndroidRuntime(912): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 12-26 17:11:05.205: E/AndroidRuntime(912): at dalvik.system.NativeStart.main(Native Method) </code></pre>
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    1. COWhy does it fail? ClassCastException?
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      1. POHow to get parent id on Android?
      1. USjcxavier
    2. COAdding failure message (exception message) to the question will help in getting most accurate answer.
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      1. POHow to get parent id on Android?
      1. USkosa
    3. COThat does `arg0.getparent().getClass().getName()` yield?
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      1. POHow to get parent id on Android?
      1. USTomislav Markovski
 

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