1. Power.java--> find corresponding native cfile(查找对应的具体用C实现的C文件)
android.os.Power.java -------- native file ---->.../jni/android_os_Power.c
2. in android_os_Power.c, you canfind:
static JNINativeMethod method_table[]= // Native functiontable
{ {"acquireWakeLock", "(ILjava/lang/String;)V", (void*)acquireWakeLock}, {"releaseWakeLock", "(Ljava/lang/String;)V", (void*)releaseWakeLock}, {"setLastUserActivityTimeout", "(J)I",(void*)setLastUse......
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