android - 来电或去电时录制语音(仅 MIC)

Question

我以 Record phone calls on android phone? 为例并将其放在 BroadcastReceiver 上，以尝试在来电和去电时录制 MIC 语音(我知道它仍然仅限于录制另一端)。我的问题是:当用户拿起电话时，我怎样才能得到状态。因为在响铃的时候，它也会去到“android.intent.action.PHONE_STATE”的action。

我的代码:

public class PhoneCallReceiver extends BroadcastReceiver 
{
    @Override
    public void onReceive(Context context, Intent intent) 
    {
        String action = intent.getAction();
        if (action.equals("android.intent.action.PHONE_STATE") 
        {
            // Phone call recording
            try {
                recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
                recorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
                recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
                recorder.setOutputFile(<my output dir>);
                recorder.prepare();
                recorder.start();
                recordStarted = true;
                telManager = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
                telManager.listen(phoneListener, PhoneStateListener.LISTEN_CALL_STATE);
            } catch(Exception ex) {

            }
        } 
    }
}


private final PhoneStateListener phoneListener = new PhoneStateListener() {
    @Override
    public void onCallStateChanged(int state, String incomingNumber) {
        try {
            switch (state) {
                case TelephonyManager.CALL_STATE_RINGING: {
                    // 
                    break;
                }
                case TelephonyManager.CALL_STATE_OFFHOOK: {
                    // 
                    break;
                }
                case TelephonyManager.CALL_STATE_IDLE: {
                    if (recordStarted) {
                        recorder.stop();
                        recordStarted = false;
                    }
                    break;
                }
                default: { }
            }
        } catch (Exception ex) {
        }
    } 
};

AndroidManifest.xml中的代码

<receiver android:name=".PhoneCallReceiver" android:enabled="true">
    <intent-filter android:priority="1000">
        <action android:name="android.intent.action.PHONE_STATE" />
    </intent-filter>
</receiver>

<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />

基于 Android 2.1 SDK 并在 HTC EVO 4G (Android 2.2) 中测试

Answer 1

如果你想从两端使用录制语音(根据 Android 文档)

recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL);

我没有试过这个，但希望对你有用并回答你的问题，你看过 TelephonyManager 的函数 getCallState() 了吗？