錯誤android.widget.ImageButton cannot be cast to android.widget.Button

點擊APP表徵圖顯示會話列表時出現異常

07-06 10:40:46.015: E/AndroidRuntime(10057): FATAL EXCEPTION: main
07-06 10:40:46.015: E/AndroidRuntime(10057): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.txrj.sms/com.txrj.sms.activity.ConversationListActivity}: java.lang.ClassCastException: android.widget.ImageButton cannot be cast to android.widget.Button

07-06 10:40:46.015: E/AndroidRuntime(10057):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1970)

07-06 10:40:46.015: E/AndroidRuntime(10057):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1995)

07-06 10:40:46.015: E/AndroidRuntime(10057):     at android.app.ActivityThread.access$600(ActivityThread.java:128)

07-06 10:40:46.015: E/AndroidRuntime(10057):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1161)

07-06 10:40:46.015: E/AndroidRuntime(10057):     at android.os.Handler.dispatchMessage(Handler.java:99)

07-06 10:40:46.015: E/AndroidRuntime(10057):     at android.os.Looper.loop(Looper.java:137)

07-06 10:40:46.015: E/AndroidRuntime(10057):     at android.app.ActivityThread.main(ActivityThread.java:4517)

mCreateMsgBtn = (Button) findViewById(R.id.create_message);

將(Button)改成(ImageButton)