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我正試圖開發需要用戶語音錄製的android應用程序。我看到很多代碼，但沒有任何與我一起工作，打開它，但它沒有記錄任何東西。Android音頻錄製
這裏是代碼：
package com.example.record8;
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 MainActivity 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.activity_main);
startButton = findViewById(R.id.btnStart);
stopButton = findViewById(R.id.btnStop);
}
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();
}
}
這裏是XML：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<Button
android:id="@+id/btnStart"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_below="@+id/textView1"
android:layout_marginLeft="45dp"
android:layout_marginTop="48dp"
android:text="@string/startrecording" />
<Button
android:id="@+id/btnStop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/btnStart"
android:layout_below="@+id/btnStart"
android:layout_marginTop="52dp"
android:text="@string/stoprecording" />
<Button
android:id="@+id/btnFormat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/btnStop"
android:layout_centerHorizontal="true"
android:layout_marginTop="75dp"
android:text="@string/audio_format" />
我不知道爲什麼忽略了最低紀錄。