要查询特定值：
adb shell sqlite3 /data/data/com.android.providers.settings/databases/settings.db "select value from 'system' where name = 'volume_alarm';"
或从表中提取所有记录：
adb shell sqlite3 /data/data/com.android.providers.settings/databases/settings.db "select name, value from 'system';"
