[Android] 调试笔记 - 查看音乐播放对应的进程名

最近遇到音乐自动播放的问题，需要确定是哪个apk或者服务调用的，有两种方法。

通过命令行：

adb shell dumpsys media.audio_flinger

查看pid对应的process name:

adb shell cat /proc/551/cmdline 
system_server

system_server 不需要关注

adb shell cat /proc/1401/cmdline 
com.kugou.android.support

直接在代码中打印log:

kris@:~/rk3288/frameworks/av/services/audioflinger$ g df  diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cppindex fab1ef5..4166545 100644--- a/services/audioflinger/AudioFlinger.cpp  +++ b/services/audioflinger/AudioFlinger.cpp@@ -462,8 +462,33 @@ status_t AudioFlinger::dump(int fd, const Vector<String16>& args)     return NO_ERROR;   }    +static char audioCallProcess[30];  +char* AudioFlinger::getCallingProcess(pid_t pid)  +{  +    int fp = -1;  +       audioCallProcess[0] = 0x00;  +       sprintf(audioCallProcess,"/proc/%d/cmdline",pid);  +  +       fp = open(audioCallProcess, O_RDONLY);  +  +       if (fp < 0) {  +               memset(audioCallProcess,0x00,sizeof(audioCallProcess));  +               ALOGE("Obtain calling process info failed");  +       } else {  +               memset(audioCallProcess,0x00,sizeof(audioCallProcess));  +               read(fp, audioCallProcess, 29);  +               close(fp);  +               fp = -1;  +               //ALOGD("Calling process is: %s",audioCallProcess);  +       }  +    return audioCallProcess;  +  +}  +  +   sp<AudioFlinger::Client> AudioFlinger::registerPid(pid_t pid)   {  +    ALOGI("registerPid:%d name:%s", pid, getCallingProcess(pid));       Mutex::Autolock _cl(mClientLock);     // If pid is already in the mClients wp<> map, then use that entry       // (for which promote() is always != 0), otherwise create a new entry and Client.@@ -1258,7 +1283,7 @@ void AudioFlinger::registerClient(const sp<IAudioFlingerClient>& client)               sp<NotificationClient> notificationClient = new NotificationClient(this,                                                                                   client,                                                                                   pid);  -            ALOGV("registerClient() client %p, pid %d", notificationClient.get(), pid);  +            ALOGI("registerClient() client %p, pid %d", notificationClient.get(), pid);                 mNotificationClients.add(pid, notificationClient);