declared here is not defined.

I: Copying classes.dex file...
I: Checking whether resources has changed...
I: Building resources...
libpng error: Not a PNG file
ERROR: Failure processing PNG image C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\drawable-mdpi\first_img.png
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:121: error: Public symbol drawable/back_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:122: error: Public symbol drawable/bg_2_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:123: error: Public symbol drawable/bg_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:124: error: Public symbol drawable/biaoqian_1_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:125: error: Public symbol drawable/biaoqian_2_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:126: error: Public symbol drawable/biaoqian_3_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:127: error: Public symbol drawable/biaoqian_4_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:128: error: Public symbol drawable/bottom_bg_focuse_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:129: error: Public symbol drawable/bottom_bg_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:130: error: Public symbol drawable/bottom_bg_pressed_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:102: error: Public symbol drawable/button_2_selector declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:131: error: Public symbol drawable/button_focuse_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:132: error: Public symbol drawable/button_press_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:103: error: Public symbol drawable/button_selector declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:133: error: Public symbol drawable/c_1 declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:134: error: Public symbol drawable/c_2 declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:135: error: Public symbol drawable/c_3 declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:136: error: Public symbol drawable/c_4 declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:137: error: Public symbol drawable/c_5 declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:138: error: Public symbol drawable/check_off declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:139: error: Public symbol drawable/check_on declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:140: error: Public symbol drawable/dan_bottom1_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:141: error: Public symbol drawable/dan_bottom2_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:142: error: Public symbol drawable/dan_bottom3_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:143: error: Public symbol drawable/dan_bottom4_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:144: error: Public symbol drawable/dan_bottom_bg_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:104: error: Public symbol drawable/dan_bottom_selector declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:145: error: Public symbol drawable/dan_chaping01_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:146: error: Public symbol drawable/dan_chaping_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:105: error: Public symbol drawable/dan_chaping_img_selector declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:147: error: Public symbol drawable/dan_haoping01_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:148: error: Public symbol drawable/dan_haoping_img declared here is not defined.
C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\values\public.xml:106: error:
Exception in thread "main" brut.androlib.AndrolibException: brut.androlib.AndrolibException: brut.common.BrutException: could not exec command: [aapt, p, --min-sdk-version, 8, -F, C:\Windows\TEMP\APKTOOL603348055864726571.tmp, -0, arsc, -I, C:\Users\XN00\apktool\framework\1.apk, -S, C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res, -M, C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\AndroidManifest.xml]
at brut.androlib.Androlib.buildResourcesFull(Androlib.java:358)
at brut.androlib.Androlib.buildResources(Androlib.java:283)
at brut.androlib.Androlib.build(Androlib.java:206)
at brut.androlib.Androlib.build(Androlib.java:176)
at brut.apktool.Main.cmdBuild(Main.java:228)
at brut.apktool.Main.main(Main.java:79)
Caused by: brut.androlib.AndrolibException: brut.common.BrutException: could not exec command: [aapt, p, --min-sdk-version, 8, -F, C:\Windows\TEMP\APKTOOL603348055864726571.tmp, -0, arsc, -I, C:\Users\XN00\apktool\framework\1.apk, -S, C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res, -M, C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\AndroidManifest.xml]
at brut.androlib.res.AndrolibResources.aaptPackage(AndrolibResources.java:357)
at brut.androlib.Androlib.buildResourcesFull(Androlib.java:336)
... 5 more
Caused by: brut.common.BrutException: could not exec command: [aapt, p, --min-sdk-version, 8, -F, C:\Windows\TEMP\APKTOOL603348055864726571.tmp, -0, arsc, -I, C:\Users\XN00\apktool\framework\1.apk, -S, C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res, -M, C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\AndroidManifest.xml]
at brut.util.OS.exec(OS.java:89)
at brut.androlib.res.AndrolibResources.aaptPackage(AndrolibResources.java:355)
... 6 more
classes.dex file Not a PNG file --------------------编程问答-------------------- libpng error: Not a PNG file
ERROR: Failure processing PNG image C:\Users\XN00\Desktop\ymdbgj\ymdbgj\android_apk_打包工具\temp\res\drawable-mdpi\first_img.png --------------------编程问答-------------------- ??? 不是很明白，那个文件我有啊！

纠结死了

补充：.NET技术 ,  C#