android 修改預設logcat列印級別
軟體版本:Android6.0
硬體平臺:MTK6797
關於系統預設的日誌級別問題,涉及到了一個系統屬性,就是persist.log.tag,那麼這個屬性是在哪裡初始化定義的呢?
在mtk原始碼的vendor/mediatek/proprietary/external/libxlog/xlogcmd目錄的xlog.c檔案中,初始化部分如下:
#define LOGD_FILTER "persist.log.tag"
static void system_filter_set(const struct xlog_filter_list *flist)
{
/* xlog_filter_dump(flist); */
int i;
xlogf_set_level(flist->default_level);
switch (flist->default_level&0xF) {
case ANDROID_LOG_DEBUG:
property_set(LOGD_FILTER, "D");
break;
case ANDROID_LOG_INFO:
property_set(LOGD_FILTER, "I");
break;
case ANDROID_LOG_WARN:
property_set(LOGD_FILTER, "W");
break;
case ANDROID_LOG_ERROR:
property_set(LOGD_FILTER, "E");
break;
case ANDROID_LOG_FATAL:
property_set(LOGD_FILTER, "A");
break;
case ANDROID_LOG_SILENT:
property_set(LOGD_FILTER, "S");
break;
case ANDROID_LOG_VERBOSE:
property_set(LOGD_FILTER, "V");
break;
default:
//set the default log level 'E'
property_set(LOGD_FILTER, "E");
break;
}
for (i = 0; i < flist->count; i++) {
xlogf_tag_set_level(flist->filters[i].tag, flist->filters[i].level);
}
}
可以看到系統預設的設定case,這是我修改過得,之前是‘V’,因此童鞋們可以根據這裡修改自己的logcat日誌級別。