View.settag (Key,object) Exception: The key must is an application-specific resource ID.

07-11 13:43:26.184:e/androidruntime (10229): FATAL exception:main
07-11 13:43:26.184:e/androidruntime (10229): java.lang.RuntimeException:Unable to start activity componentinfo{ Com.txrj.sms/com.txrj.sms.activity.createmessageactivity}: Java.lang.IllegalArgumentException:The key must is an Application-specific resource ID.
07-11 13:43:26.184:e/androidruntime (10229): at Android.app.ActivityThread.performLaunchActivity ( activitythread.java:1970)
07-11 13:43:26.184:e/androidruntime (10229): at Android.app.ActivityThread.handleLaunchActivity ( activitythread.java:1995)
07-11 13:43:26.184:e/androidruntime (10229): at android.app.activitythread.access$600 (ActivityThread.java:128)
07-11 13:43:26.184:e/androidruntime (10229): at Android.app.activitythread$h.handlemessage (ActivityThread.java : 1161)
07-11 13:43:26.184:e/androidruntime (10229): at Android.os.Handler.dispatchMessage (handler.java:99)
07-11 13:43:26.184:e/androidruntime (10229): at Android.os.Looper.loop (looper.java:137)
07-11 13:43:26.184:e/androidruntime (10229): at Android.app.ActivityThread.main (activitythread.java:4517)
07-11 13:43:26.184:e/androidruntime (10229): at Java.lang.reflect.Method.invokeNative (Native Method)
07-11 13:43:26.184:e/androidruntime (10229): at Java.lang.reflect.Method.invoke (method.java:511)
07-11 13:43:26.184:e/androidruntime (10229): at Com.android.internal.os.zygoteinit$methodandargscaller.run ( zygoteinit.java:993)
07-11 13:43:26.184:e/androidruntime (10229): at Com.android.internal.os.ZygoteInit.main (zygoteinit.java:760)
07-11 13:43:26.184:e/androidruntime (10229): at Dalvik.system.NativeStart.main (Native Method)
07-11 13:43:26.184:e/androidruntime (10229):caused By:java.lang.IllegalArgumentException:The key must is an application-specific resource ID.
07-11 13:43:26.184:e/androidruntime (10229): at Android.view.View.setTag (view.java:12585)
07-11 13:43:26.184:e/androidruntime (10229): at Com.txrj.sms.activity.CreateMessageActivity.getRecipientItem ( CREATEMESSAGEACTIVITY.JAVA:47)
07-11 13:43:26.184:e/androidruntime (10229): at Com.txrj.sms.activity.CreateMessageActivity.onCreate ( CREATEMESSAGEACTIVITY.JAVA:41)
07-11 13:43:26.184:e/androidruntime (10229): at Android.app.Activity.performCreate (activity.java:4470)
07-11 13:43:26.184:e/androidruntime (10229): at Android.app.Instrumentation.callActivityOnCreate ( instrumentation.java:1053)
07-11 13:43:26.184:e/androidruntime (10229): at Android.app.ActivityThread.performLaunchActivity ( activitythread.java:1934)
07-11 13:43:26.184:e/androidruntime (10229): ... One more

Cause Analysis:

Settag is a useful method in the view class of Android, which can be used to attach some information to space and to use it in many situations.

The Settag (Object tag) method is relatively simple, here we mainly talk about the Settag method with two parameters.

The official API documentation mentions:

"The specified key should is a ID declared in the resources of the application to ensure it's unique (see the ID RESOURC E type). The Keys identified as belonging to the Android-framework or not-associated with any package would cause an to be IllegalArgumentException thrown. "

So the reason to throw illegalargumentexception is that key is not unique, so how to guarantee the uniqueness of it? It is not possible to define an int variable of the final type and hard-code a value.

If you only need to set a tag, then the direct call Settag (Object tag) method can be easily done, if you need to use more than one tag binding, you need to first add in Res/values/ids.xml

<resources>
<item type= "id" name= "tag_first" ></item>
<item type= "id" name= "tag_second" ></item>
</resources>

Write when you use it.

imageView.setTag(R.id.tag_first, "Hello");imageView.setTag(R.id.tag_second, "Success");

You can do it.

Reference: http://blog.csdn.net/furongkang/article/details/7267317

View.settag (Key,object) Exception: The key must is an application-specific resource ID.