我想要检测其他应用是否正在使用MediaRecorder,以便停止我的录音机并在以后继续使用。我看到了安卓的语音录音应用程序,它正是我所说的,但是它是如何实现的呢? 谢谢。
我想要检测其他应用是否正在使用MediaRecorder,以便停止我的录音机并在以后继续使用。我看到了安卓的语音录音应用程序,它正是我所说的,但是它是如何实现的呢? 谢谢。
当另一个程序试图访问MediaRecorder时,您要么会收到错误消息,要么程序崩溃。换句话说,您拥有它的独占访问权。
您无法直接获取MediaRecorder的状态,但是可以验证是否正在录制。以下是可以实现您需求的代码:
package com.aplayer;
import java.io.IOException;
import android.app.Activity;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.widget.Toast;
public class APlayerActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
MediaRecorder
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
recorder.setOutputFile("/sdcard/test.wav");
try {
recorder.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
Log.d("ERROR ","IllegalStateException");
Toast msg = Toast.makeText(APlayerActivity.this, "IllegalStateException", Toast.LENGTH_LONG);
msg.setGravity(Gravity.CENTER, msg.getXOffset() / 2, msg.getYOffset() / 2);
msg.show();
} catch (Exception e) {
// TODO Auto-generated catch block
Log.d("ERROR ","IOException");
e.printStackTrace();
Toast msg = Toast.makeText(APlayerActivity.this, "IOException", Toast.LENGTH_LONG);
msg.setGravity(Gravity.CENTER, msg.getXOffset() / 2, msg.getYOffset() / 2);
msg.show();
}
try {
recorder.start();
Toast msg = Toast.makeText(APlayerActivity.this, "Recording", Toast.LENGTH_LONG);
msg.setGravity(Gravity.CENTER, msg.getXOffset() / 2, msg.getYOffset() / 2);
msg.show();
} catch (Exception e) {
Log.e("ERROR", "start() failed");
Toast msg = Toast.makeText(APlayerActivity.this, "Recording failed", Toast.LENGTH_LONG);
msg.setGravity(Gravity.CENTER, msg.getXOffset() / 2, msg.getYOffset() / 2);
msg.show();
}
}
}
public boolean isMicrophoneAvailable() {
boolean available = true;
AudioRecord recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, 44100, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_DEFAULT, 44100);
try {
if (recorder.getRecordingState() != AudioRecord.RECORDSTATE_STOPPED) {
available = false;
}
recorder.startRecording();
if (recorder.getRecordingState() != AudioRecord.RECORDSTATE_RECORDING) {
recorder.stop();
available = false;
}
recorder.stop();
} finally {
recorder.release();
}
return available;
}