android 修改系统各种类型的声音的默认值和最大最小值

在android 系统中，我们有时候需要修改系统默认的声音。则可以参考如下改动：

1.framework//base/services/core/java/com/android/server/audio/AudioService.java

   /** Maximum volume index values for audio streams */    protected static int[] MAX_STREAM_VOLUME = new int[] {        5,  // STREAM_VOICE_CALL        7,  // STREAM_SYSTEM        7,  // STREAM_RING        15, // STREAM_MUSIC        7,  // STREAM_ALARM        7,  // STREAM_NOTIFICATION        15, // STREAM_BLUETOOTH_SCO        7,  // STREAM_SYSTEM_ENFORCED        15, // STREAM_DTMF        15, // STREAM_TTS        15  // STREAM_ACCESSIBILITY    };    /** Minimum volume index values for audio streams */    protected static int[] MIN_STREAM_VOLUME = new int[] {        1,  // STREAM_VOICE_CALL        0,  // STREAM_SYSTEM        0,  // STREAM_RING        0,  // STREAM_MUSIC        1,  // STREAM_ALARM        0,  // STREAM_NOTIFICATION        0,  // STREAM_BLUETOOTH_SCO        0,  // STREAM_SYSTEM_ENFORCED        0,  // STREAM_DTMF        0,  // STREAM_TTS        1   // STREAM_ACCESSIBILITY    };

2.framework/base/media/java/android/media/AudioSystem.java

    public static int[] DEFAULT_STREAM_VOLUME = new int[] {        4,  // STREAM_VOICE_CALL        7,  // STREAM_SYSTEM        5,  // STREAM_RING        5, // STREAM_MUSIC        6,  // STREAM_ALARM        5,  // STREAM_NOTIFICATION        7,  // STREAM_BLUETOOTH_SCO        7,  // STREAM_SYSTEM_ENFORCED        5, // STREAM_DTMF        5, // STREAM_TTS        5, // STREAM_ACCESSIBILITY    };

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