mt6735 如何修改拨号按键音量大小

[DESCRIPTION]
如何修改拨号按键音量大小
[SOLUTION]
有如下两种方法：
一.在DTMFTwelveKeyDialer.java中startDialerSession方法
。
mToneGenerator = new ToneGenerator(AudioManager.STREAM_DTMF,XXX);
//参数XXX:当前level DTMF音量的百分比值，取值范围0~100
。
二.在AudiomtkPolicyManager.cpp修改audiovolume_dtmf，取值范围在0～255，音量大小与数值成正比
static unsigned char
audiovolume_dtmf[NUM_OF_VOL_MODE][AUDIO_MAX_VOLUME_STEP]=
{
{152,168,184,200,216,232,255,0,0,0,0,0,0,0,0}, //听筒出声
{152,168,184,200,216,232,255,0,0,0,0,0,0,0,0},//耳机出声
{160,184,196,208,220,232,255,0,0,0,0,0,0,0,0},//喇叭出声
{152,168,184,200,216,232,255,0,0,0,0,0,0,0,0}//耳机和喇叭同时可以发声
};