当我尝试在手机上运行我的应用程序时，我收到这些错误。但是有人知道为什么我收到这些错误吗？提前致谢! 以下是 logcat 错误，是什么原因导致这些错误？:
01-12 12:35:06.299: D/dalvikvm(12107): GC_EXTERNAL_ALLOC freed 51K, 49% free 2793K/5379K, external 1596K/2108K, paused 42ms
01-12 12:35:06.342: D/dalvikvm(12107): GC_EXTERNAL_ALLOC freed 1K, 49% free 2792K/5379K, external 2115K/2641K, paused 33ms
01-12 12:35:09.792: D/dalvikvm(12107): GC_EXTERNAL_ALLOC freed 10K, 48% free 2826K/5379K, external 2449K/2722K, paused 37ms
01-12 12:38:46.940: W/KeyCharacterMap(12107): Can't open keycharmap file
01-12 12:38:46.944: W/KeyCharacterMap(12107): Error loading keycharmap file '/system/usr/keychars/cypress-touchkey.kcm.bin'. hw.keyboards.65537.devname='cypress-touchkey'
01-12 12:38:46.944: W/KeyCharacterMap(12107): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
01-12 12:38:58.823: D/dalvikvm(12206): GC_EXTERNAL_ALLOC freed 48K, 49% free 2793K/5379K, external 1596K/2108K, paused 67ms
01-12 12:38:58.866: D/dalvikvm(12206): GC_EXTERNAL_ALLOC freed 1K, 49% free 2792K/5379K, external 2115K/2641K, paused 32ms
01-12 12:39:00.679: D/AndroidRuntime(12206): Shutting down VM
01-12 12:39:00.679: W/dalvikvm(12206): threadid=1: thread exiting with uncaught exception (group=0x40015578)
01-12 12:39:00.706: E/AndroidRuntime(12206): FATAL EXCEPTION: main
01-12 12:39:00.706: E/AndroidRuntime(12206): android.content.ActivityNotFoundException: Unable to find explicit activity class {android.app/android.app.activity3}; have you declared this activity in your AndroidManifest.xml?
最佳答案
01-12 12:39:00.706: E/AndroidRuntime(12206): android.content.ActivityNotFoundException: Unable to find explicit activity class {android.app/android.app.activity3}; have you declared this activity in your AndroidManifest.xml?
您是否在 AndroidManifest.xml 中声明了名为 activity3 的 Activity ？
关于java - 无法启动 Activity 组件信息java.lang.nullpointerException？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8840133/