我想为我的项目制作一个应用程序。它看起来像一个 Android 呼叫应用程序，可以通过网络内的 IP 地址和 Android 电话发送语音。但我的问题是我无法接收音频。我的录音工作正常。
这是我的代码：
MainActivity.java
import java.net.DatagramSocket;
import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import com.example.voip.Microphone;
import com.example.voip.Speaker;
public class MainActivity extends Activity {
DatagramSocket sock = null;
ArrayList<String> on = null;
Button btnStart;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
btnStart = (Button) findViewById(R.id.btnStart);
btnStart.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
disp();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public void disp(){
on = new ArrayList<String>();
on.add("192.168.1.103");
try{
sock = new DatagramSocket(4003);
}catch(Exception e){
}
Thread mic = new Thread(new Microphone(sock, 4003, on));
mic.start();
}
}
麦克风.java
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.util.ArrayList;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
public class Microphone implements Runnable{
private DatagramSocket sock = null;
private int port = 0;
int buffsize = 0;
AudioRecord ar;
private ArrayList<String> on = null;
public Microphone(DatagramSocket d,int recPort,ArrayList<String> joi) {
this.sock = d;
this.on = joi;
this.port =recPort;
}
@Override
public void run(){
try {
buffsize = AudioRecord.getMinBufferSize(44100, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
ar = new AudioRecord(MediaRecorder.AudioSource.MIC, 44100, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, buffsize);
ar.startRecording();
byte[] soundData = new byte[1];
int bytesRead = 0;
while (bytesRead != -1) {
bytesRead = ar.read(soundData, 0, soundData.length);
if (bytesRead >= 0) {
for (int y = 0; y < on.size(); y++) {
DatagramPacket pac = new DatagramPacket(soundData,soundData.length,InetAddress.getByName(on.get(y).toString()),port);
sock.send(pac);
}
}
Thread.sleep(0);
}
/*
AudioFormat af = new AudioFormat(8000.0f, 8, 1, true, false);
DataLine.Info info = new DataLine.Info(TargetDataLine.class, af);
TargetDataLine microphone = (TargetDataLine) AudioSystem.getLine(info);
microphone.open(af);
microphone.start();
byte[] soundData = new byte[1];
int bytesRead = 0;
while (bytesRead != -1) {
bytesRead = microphone.read(soundData, 0, soundData.length);
if (bytesRead >= 0) {
for (int y = 0; y < on.size(); y++) {
DatagramPacket pac = new DatagramPacket(soundData,
soundData.length,
InetAddress.getByName(on.getElementAt(y).toString()),
port);
sock.send(pac);
}
}
Thread.sleep(0);
}
} catch (Exception e) {
}
}
*/
}catch(Exception e){
}
}
public void setSock(DatagramSocket sock) {
this.sock = sock;
}
/**
* @param port the port to set
*/
public void setPort(int port) {
this.port = port;
}
/**
* @param on the on to set
*/
public void setOn(ArrayList<String> on) {
this.on = on;
}
}
扬声器.java
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioRecord;
import android.media.AudioTrack;
import android.media.MediaRecorder;
import android.net.rtp.AudioStream;
public class Speaker implements Runnable {
private int freq = 44100 ;
private Thread Rthread = null;
private AudioManager audioManager = null;
private AudioTrack inSpeaker = null;
byte[] buffer = new byte[freq];
private DatagramSocket soc = null;
DatagramPacket pack = null;
// SourceDataLine inSpeaker = null;
public Speaker(DatagramSocket s) {
try {
/*
this.soc = s;
AudioFormat af = new AudioFormat(8000.0f, 8, 1, true, false);
DataLine.Info info = new DataLine.Info(SourceDataLine.class, af);
inSpeaker = (SourceDataLine) AudioSystem.getLine(info);
inSpeaker.open(af);
*/
int bufferSize = AudioRecord.getMinBufferSize(freq,
AudioFormat.CHANNEL_CONFIGURATION_MONO,
AudioFormat.ENCODING_PCM_16BIT);
inSpeaker = new AudioTrack(AudioManager.ROUTE_HEADSET, freq,
AudioFormat.CHANNEL_CONFIGURATION_MONO,
MediaRecorder.AudioEncoder.AMR_NB, bufferSize,
AudioTrack.MODE_STREAM);
System.out.println("Speak");
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
public void run() {
inSpeaker.setPlaybackRate(freq);
int bytesRead = 1;
byte[] inSound = new byte[1];
inSpeaker.play();
while (bytesRead != -1) {
pack = new DatagramPacket(inSound, inSound.length);
try {
soc.receive(pack);
if (bytesRead >= 0) {
inSpeaker.write(inSound, 0, bytesRead);
}
} catch (IOException ex) {
System.out.println(ex.getMessage());
}
}
}
public void setSoc(DatagramSocket soc) {
this.soc = soc;
}
}
Receiver.java
package com.example.call;
import java.net.DatagramSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import com.example.voip.Speaker;
public class Receiver extends BroadcastReceiver{
DatagramSocket sock;
@Override
public void onReceive(Context arg0, Intent arg1) {
// TODO Auto-generated method stub
try{
sock = new DatagramSocket(4003);
}catch(Exception e){
}
Thread speak = new Thread(new Speaker(sock));
speak.start();
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.call"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permission.USE_SIP" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"></uses-permission>
<uses-feature android:name="android.hardware.microphone" android:required="true"/>
<uses-feature android:name="android.hardware.wifi" android:required="true" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.call.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name="com.example.call.Receiver"></receiver>
</application>
</manifest>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="20dip">
<ImageView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher"
android:scaleType="fitCenter"/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Info"
android:layout_weight="1.0"
android:textSize="20dip"/>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/btnStart"
android:text="Start Recording"
android:layout_weight="1.0"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/btnStop"
android:text="Stop Recording"
android:layout_weight="1.0"/>
</LinearLayout>
</LinearLayout>
完全没有错误。但我无法收到任何声音。请帮忙=(
提前致谢。