我正在尝试检测 MediaRecorder 是否被其他应用程序使用,以停止我的记录器并继续供以后使用。我看到了 Android 的录音机应用程序,它确实可以实现我所说的功能,但是如何实现? 谢谢。
最佳答案
当另一个程序试图访问 MediaRecorder 时,您要么收到错误,要么崩溃。换句话说,您可以独占访问它。
您无法直接获取 MediaRecorder 的状态,但是您可以验证您是否正在录制。这是执行您想要的操作的代码:
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();
}
}
}
关于java - 如何检测 MediaRecorder 是否被另一个应用程序使用?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/11049546/