如何获得父ID在Android? [英] How to get parent id on Android?
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问题描述
我试图让单选(RadioGroup中的ID)的父ID通过
RadioGroup中RG =(RadioGroup中)arg0.getParent();
但是失败了。继建
RadioGroup中RG =(RadioGroup中)findViewById(R.id.radiogr);
效果很好。我怎样才能得到父母的id在运行时?
失败,这些日志:
12-26 17:11:05.205:E / AndroidRuntime(912):致命异常:主要
12-26 17:11:05.205:E / AndroidRuntime(912):java.lang.ClassCastException:android.widget.LinearLayout
12-26 17:11:05.205:E / AndroidRuntime(912):在com.letmedraw.shopcart.ShopCartActivity.onCheckedChanged(ShopCartActivity.java:96)
12-26 17:11:05.205:E / AndroidRuntime(912):在android.widget.RadioGroup.setCheckedId(RadioGroup.java:172)
12-26 17:11:05.205:E / AndroidRuntime(912):在android.widget.RadioGroup.access $ 600(RadioGroup.java:52)
12-26 17:11:05.205:E / AndroidRuntime(912):在android.widget.RadioGroup $ CheckedStateTracker.onCheckedChanged(RadioGroup.java:342)
12-26 17:11:05.205:E / AndroidRuntime(912):在android.widget.CompoundButton.setChecked(CompoundButton.java:127)
12-26 17:11:05.205:E / AndroidRuntime(912):在android.widget.CompoundButton.toggle(CompoundButton.java:86)
12-26 17:11:05.205:E / AndroidRuntime(912):在android.widget.RadioButton.toggle(RadioButton.java:69)
12-26 17:11:05.205:E / AndroidRuntime(912):在android.widget.CompoundButton.performClick(CompoundButton.java:98)
12-26 17:11:05.205:E / AndroidRuntime(912):在android.view.View $ PerformClick.run(View.java:8816)
12-26 17:11:05.205:E / AndroidRuntime(912):在android.os.Handler.handleCallback(Handler.java:587)
12-26 17:11:05.205:E / AndroidRuntime(912):在android.os.Handler.dispatchMessage(Handler.java:92)
12-26 17:11:05.205:E / AndroidRuntime(912):在android.os.Looper.loop(Looper.java:123)
12-26 17:11:05.205:E / AndroidRuntime(912):在android.app.ActivityThread.main(ActivityThread.java:4627)
12-26 17:11:05.205:E / AndroidRuntime(912):在java.lang.reflect.Method.invokeNative(本机方法)
12-26 17:11:05.205:E / AndroidRuntime(912):在java.lang.reflect.Method.invoke(Method.java:521)
12-26 17:11:05.205:E / AndroidRuntime(912):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:868)
12-26 17:11:05.205:E / AndroidRuntime(912):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-26 17:11:05.205:E / AndroidRuntime(912):在dalvik.system.NativeStart.main(本机方法)
解决方案
所有视图(控制)Android中的数据类型为查看
,这样你就可以使用的getId()
找到ID。
INT parentId的=((查看)arg0.getParent())的getId()。
I've tried to get parent id of RadioButton (id of RadioGroup) by
RadioGroup rg = (RadioGroup) arg0.getParent();
but it failed. Following construction
RadioGroup rg = (RadioGroup) findViewById(R.id.radiogr);
works well. How can I get parent id at runtime?
fails with these logs:
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)
解决方案
All views (controls) in android are of type View
, so you can use getId()
to find the id.
int parentId = ((View) arg0.getParent()).getId();
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