android how to implement call recording function

There are two problems :
1. calls later how to trigger the recording function is activated , to use multi-threading it , what is the process code .
2. recording is bidirectional, one's own call recording via mic recording, then the other side of it , it would not be recorded with the mic are they not recorded sound , do not have to open handsfree job ?
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1, guess need multi-threading
2, that under the agreement it
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  	recorder = new MediaRecorder();
  			// 设置录音为麦克风
  			recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
  			recorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
  			recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
  			recorder.setOutputFile(recordAudioFile.getAbsolutePath());
  			try {
  				recordAudioFile.createNewFile();
  				recorder.prepare();
  				recorder.start(); 
  			} catch (IOException e) {
  				e.printStackTrace();
  			}
  

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6 F prawn if you only want to record your own voice how do like off the PC machine stereo mix has this function it
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each other's voices underlying phone module can be captured to
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Meirenhuida Mody, answer the first question line ah
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you this is not what is recorded from the mic , one's own voice is heard, and the other how to do ?

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can detail what, the second may be more difficult to resolve , first can you give some examples or code , not necessarily recording is triggered when a call on the line

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each other's voices can be recorded down brother,

You can first try what I've tried OK ~
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good , prawns , that there is a problem in the first category . . How the recording during a call , when it is triggered . .
otherwise I would not try it . . .
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can use the boot to start a broadcast service background to monitor the incoming radio broadcast when the call arrival time . With phoneMamager.lisen (); to deal with.
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I also try this with a mac to record each other's voices very quietly , would have VOICE_CALL can record audio down the line , but it seems a lot of phones are restricted for security right out of this , if VOICE_CALL will complain , so I have also been thinking about recording of the problem .. landlord if there any good way , trouble say Ha !
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best not to use the mic to record inside , Andrews this point do not, with the palm of the previous system , the recording is very clear.
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landlord do you implement two-way audio

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huh. Certainly can be achieved. But not yet. . Either way a lot of recordings in order to achieve the different models or else a lot of problems . . .
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in the end how to achieve ?
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really it ?