如何在Android中使用Delphi和API发出哔声? [英] How do I make a beep sound in Android using Delphi and the API?

问题描述

在查看了Androidapi.JNI.Media.pas之后，我编写了以下过程:

After having a look at the Androidapi.JNI.Media.pas, I coded the following procedure:

uses
  Androidapi.JNIBridge,
  AndroidApi.JNI.Media;

procedure Sound(ADuration: Integer);

implementation

procedure Sound(ADuration: Integer);
var
  Volume: Integer;
  StreamType: Integer;
  ToneType: Integer;
  ToneGenerator: JToneGenerator;
begin

  Volume := TJToneGenerator.JavaClass.MAX_VOLUME;

  StreamType := ?
  ToneType := TJToneGenerator.JavaClass.TONE_DTMF_0;

  ToneGenerator := TJToneGenerator.JavaClass.init(StreamType, Volume);
  ToneGenerator.startTone(ToneType, ADuration);

end;

但是我不知道如何为StreamType设置值? 谢谢

but I can't figure out how to set a value for the StreamType? Thanks

推荐答案

流类型标识必须在其上发出蜂鸣声的流.它是0到4之间的整数:

The stream type identify the stream on which the beep must be played. It is an integer between 0 and 4 :

• STREAM_VOICE_CALL(0)
• STREAM_SYSTEM(1)
• STREAM_RING(2)
• STREAM_MUSIC(3)
• STREAM_ALARM(4)

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