调用音频记录和获取生成的文件 [英] Invoking audio recorder and getting the resulting file
问题描述
我想调用在Android 2.2.1的音频记录(设备三星Galaxy POP),使用下面的code:
I am trying to invoke the audio recorder on Android 2.2.1 (device Samsung Galaxy POP) using the following code:
private static final int ACTIVITY_RECORD_SOUND = 1;
Intent intent = new Intent(MediaStore.Audio.Media.RECORD_SOUND_ACTION);
startActivityForResult(intent, ACTIVITY_RECORD_SOUND);
这成功地调用记录。在我的活动结果我做到以下几点:
This invokes the recorder successfully. In my activity result i do the following:
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK) {
switch (requestCode) {
case ACTIVITY_RECORD_SOUND:
data.getDataString();
break;
}
}
}
在我完成录制我preSS回到了录音机,返回按预期的方式控制到onActivityResult方法,但我的结果code始终为0(这是Activity.RESULT_CANCELED)和我的数据是空值。难道我错过了一些东西呢?请帮助我。这适用于仿真器而不是在该设备。先谢谢了。
After i complete the recording i press back on the audio recorder which returns the control to the onActivityResult method as expected, but my resultCode is always 0 (which is Activity.RESULT_CANCELED) and my data is null. Am i missing out on something here? Kindly help me with this. This works on the emulator but not on the device. Thanks in advance.
推荐答案
我终于利用FileObserver找到一个解决办法我的问题。我用以下方法来实现它:
I finally found a workaround for my problem by using the FileObserver. I achieved it by doing the following:
package com.pravaa.audiointent;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Vector;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.FileObserver;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.Toast;
public class AudioActivity extends Activity implements OnClickListener {
/** Called when the activity is first created. */
private Button sampleButton;
private FileObserver mFileObserver;
private Vector<String> audioFileNames;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
audioFileNames = new Vector<String>();
LinearLayout finalContainer = new LinearLayout(this);
sampleButton = new Button(this);
sampleButton.setOnClickListener(this);
sampleButton.setText("Start Audio Intent");
finalContainer.addView(sampleButton);
setContentView(finalContainer);
addObserver();
}
private void addObserver() {
this.mFileObserver = new FileObserver("/sdcard/Sounds/") {
@Override
public void onEvent(int event, String path) {
if (event == FileObserver.CREATE) {
if (path != null) {
int index = path.indexOf("tmp");
String tempFileName = (String) path.subSequence(0,
index - 1);
audioFileNames.add(tempFileName);
}
} else if (event == FileObserver.DELETE) {
if (path != null) {
int index = path.indexOf("tmp");
String tempFileName = (String) path.subSequence(0,
index - 1);
if (audioFileNames.contains(tempFileName)) {
audioFileNames.remove(tempFileName);
}
}
}
}
};
}
private void readFile(String fileName) {
File attachment = new File("/sdcard/Sounds/" + fileName);
if (attachment.exists()) {
FileInputStream fis;
try {
fis = new FileInputStream(attachment);
byte[] bytes = new byte[(int) attachment.length()];
try {
fis.read(bytes);
fis.close();
attachment.delete();
saveMedia("Test" + fileName, bytes);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
mFileObserver.startWatching();
}
public void saveMedia(String fileName, byte[] data) {
String imagePath = "/sdcard/sam/";
System.out.println("Inside Folder");
File file = new File(imagePath, fileName);
System.out.println("File Created");
FileOutputStream fileOutputStream = null;
try {
fileOutputStream = new FileOutputStream(file);
DataOutputStream dataOutputStream = new DataOutputStream(
fileOutputStream);
System.out.println("Writting File");
dataOutputStream.write(data, 0, data.length);
System.out.println("Finished writting File");
dataOutputStream.flush();
dataOutputStream.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent(MediaStore.Audio.Media.RECORD_SOUND_ACTION);
startActivityForResult(intent, 2);
}
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
// TODO Auto-generated method stub
if (requestCode == 2) {
if (mFileObserver != null) {
mFileObserver.stopWatching();
}
Enumeration<String> audioFileEnum = audioFileNames.elements();
while (audioFileEnum.hasMoreElements()) {
readFile((String) audioFileEnum.nextElement());
}
}
}}
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