Android 移动终端camera 防偷*拍设置

目前市面上的所有移动终端几乎都有camera 应用，但Android .html">Android 原生系统在静音模式下拍照是没有声音的，大部分国家的终端都有法规限制，如防止偷*拍 ，不管什么模式下拍照都应该发出快门音，针对此问题只要修改Android .html">Android 原生camera service.cpp中playSound函数即可，

   android 4.0.3声音分类

 

typedef enum {
    AUDIO_STREAM_DEFAULT          = -1,
    AUDIO_STREAM_VOICE_CALL       = 0,
    AUDIO_STREAM_SYSTEM           = 1,
    AUDIO_STREAM_RING             = 2,
    AUDIO_STREAM_MUSIC            = 3,
    AUDIO_STREAM_ALARM            = 4,
    AUDIO_STREAM_NOTIFICATION     = 5,
    AUDIO_STREAM_BLUETOOTH_SCO    = 6,
    AUDIO_STREAM_ENFORCED_AUDIBLE = 7, /* Sounds that cannot be muted by
user and must be routed to speaker */
    AUDIO_STREAM_DTMF             = 8,
    AUDIO_STREAM_TTS              = 9,    
    AUDIO_STREAM_FM               = 10,
    AUDIO_STREAM_MATV             = 11,
    AUDIO_STREAM_BOOT             = 12, //only used for bootanimation
and output from speaker and headset

    AUDIO_STREAM_CNT,
    AUDIO_STREAM_MAX              = AUDIO_STREAM_CNT - 1,
} audio_stream_type_t;

 

 

   修改后的方法如下：

 

void cameraService::playSound(sound_kind kind) {
    LOG1("playSound(%d)", kind);
    Mutex::Autolock lock(mSoundLock);
    sp<MediaPlayer> player = mSoundPlayer[kind];
    if (player != 0) {
        // do not play the sound if stream volume is 0
        // (typically because ringer mode is silent).
        int index;
        AudioSystem::getStreamVolumeIndex(AUDIO_STREAM_ENFORCED_AUDIBLE
, &index);
        if (index != 0) {
              AudioSystem::setStreamVolumeIndex(AUDIO_STREAM_ENFORCED_AUDIBLE
,index);
            player->seekTo(0);
            player->start();
        } else {
                AudioSystem::setStreamVolumeIndex(AUDIO_STREAM_ENFORCED_AUDIBLE
,7);
                        player->seekTo(0);
                        player->start();
                        usleep(300000);
                        AudioSystem::setStreamVolumeIndex(AUDIO_STREAM_ENFORCED_AUDIBLE
,0);
        }
    }
}