I checked it and found that ADB logcat can be used on the Internet, but I didn't figure it out.
After checking the relevant information, eclipse can switch to debug to try. The view has a logcat box. Double-click to enlarge the display and export it as text!
Then you can view the relevant information:
Paste my logcat analysis:
11-24 17:00:20. 086: E/androidruntime (293): Fatal exception: Main
11-24 17:00:20. 086: E/androidruntime (293): Java. Lang. nullpointerexception
11-24 17:00:20. 086: E/androidruntime (293): at Android. content. contextwrapper. getresources (contextwrapper. Java: 80)
11-24 17:00:20. 086: E/androidruntime (293): At com. example. Android. APIs. App. setmywallpaper. getmywall (setmywallpaper. Java: 16)
11-24 17:00:20. 086: E/androidruntime (293): At com. example. Android. APIs. App. setwallpaperactivity $3. onclick (setwallpaperactivity. Java: 96)
11-24 17:00:20. 086: E/androidruntime (293): at Android. View. View. javasmclick (view. Java: 2408)
11-24 17:00:20. 086: E/androidruntime (293): at Android. View. View $ export mclick. Run (view. Java: 8816)
11-24 17:00:20. 086: E/androidruntime (293): at Android. OS. handler. handlecallback (handler. Java: 587)
11-24 17:00:20. 086: E/androidruntime (293): at Android. OS. handler. dispatchmessage (handler. Java: 92)
11-24 17:00:20. 086: E/androidruntime (293): at Android. OS. logoff. Loop (logoff. Java: 123)
11-24 17:00:20. 086: E/androidruntime (293): at Android. App. activitythread. Main (activitythread. Java: 4627)
11-24 17:00:20. 086: E/androidruntime (293): At java. Lang. Reflect. method. invokenative (native method)
11-24 17:00:20. 086: E/androidruntime (293): At java. Lang. Reflect. method. Invoke (method. Java: 521)
11-24 17:00:20. 086: E/androidruntime (293): At com. Android. Internal. OS. zygoteinit $ methodandargscaller. Run (zygoteinit. Java: 868)
11-24 17:00:20. 086: E/androidruntime (293): At com. Android. Internal. OS. zygoteinit. Main (zygoteinit. Java: 626)
11-24 17:00:20. 086: E/androidruntime (293): At Dalvik. system. nativestart. Main (native method)
Wait for the answers!