我正在尝试开发一个录音应用程序,我可以开始和停止录制。从逻辑上讲,它应该创建一个包含已保存音频的音频文件。不幸的是,当我检查文件时,没有任何音频。因此,我不太确定代码中的错误。
这是我的主要录音机类。
package com.example.soundrecorder;
import java.io.File;
import java.io.IOException;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Intent;
import android.media.MediaRecorder;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
public class SoundRecorder extends Activity {
MediaRecorder recorder;
File audiofile = null;
private static final String TAG = "SoundRecordingActivity";
private View startButton;
private View stopButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
startButton = findViewById(R.id.start);
stopButton = findViewById(R.id.stop);
}
public void startRecording(View view) throws IOException {
startButton.setEnabled(false);
stopButton.setEnabled(true);
File sampleDir = Environment.getExternalStorageDirectory();
try {
audiofile = File.createTempFile("sound", ".3gp", sampleDir);
} catch (IOException e) {
Log.e(TAG, "sdcard access error");
return;
}
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(audiofile.getAbsolutePath());
recorder.prepare();
recorder.start();
}
public void stopRecording(View view) {
startButton.setEnabled(true);
stopButton.setEnabled(false);
recorder.stop();
recorder.release();
addRecordingToMediaLibrary();
}
protected void addRecordingToMediaLibrary() {
ContentValues values = new ContentValues(4);
long current = System.currentTimeMillis();
values.put(MediaStore.Audio.Media.TITLE, "audio" + audiofile.getName());
values.put(MediaStore.Audio.Media.DATE_ADDED, (int) (current / 1000));
values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/3gpp");
values.put(MediaStore.Audio.Media.DATA, audiofile.getAbsolutePath());
ContentResolver contentResolver = getContentResolver();
Uri base = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
Uri newUri = contentResolver.insert(base, values);
sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, newUri));
Toast.makeText(this, "Added File " + newUri, Toast.LENGTH_LONG).show();
}
}
有我的录音清单
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.soundrecorder"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".SoundRecorder"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
答案 0 :(得分:0)
首先,您需要定义:
MediaRecorder mrec = new MediaRecorder();
File sampleDir = Environment.getExternalStorageDirectory();
File audiofile = File.createTempFile("ibm", ".mp4", sampleDir);
之后,您需要定义FileProcessing函数:
protected void processaudiofile()
{
ContentValues values = new ContentValues(3);
long current = System.currentTimeMillis();
values.put(MediaStore.Audio.Media.TITLE, "audio" + audiofile.getName());
values.put(MediaStore.Audio.Media.DATE_ADDED, (int) (current / 1000));
//values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/3gpp");
values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/mp4");
values.put(MediaStore.Audio.Media.DATA, audiofile.getAbsolutePath());
ContentResolver contentResolver = getContentResolver();
Uri base = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
Uri newUri = contentResolver.insert(base, values);
sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, newUri));
}
使用两者并确保一切正常。
晚安。