我一直在努力弄清楚如何用麦克风将麦克风传输到扬声器。
我想要一个可以打开和关闭它的按钮。
我找到了一些代码,但让它发挥作用就是问题所在。如果我从一个按钮运行此代码,它会崩溃应用程序。从麦克风到扬声器播放声音似乎很难。
提前感谢大家的帮助!
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioRecord;
import android.media.AudioTrack;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
// Variables
private static final String TAG = "Aufnahme";
private AudioRecord recorder = null;
private boolean isRecording = false;
private int SAMPLERATE = 8000;
private int CHANNELS = AudioFormat.CHANNEL_CONFIGURATION_MONO;
private int AUDIO_FORMAT = AudioFormat.ENCODING_PCM_16BIT;
private int bufferSize = AudioRecord.getMinBufferSize(SAMPLERATE, CHANNELS, AUDIO_FORMAT);
private Thread recordingThread = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
SetupRecordButton();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
public void SetupRecordButton(){
Button recordButton = (Button) findViewById(R.id.button);
recordButton.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
startRecording();
}
});
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void startRecording() {
recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, SAMPLERATE,
CHANNELS, AUDIO_FORMAT, bufferSize);
recorder.startRecording();
isRecording = true;
recordingThread = new Thread(new Runnable()
{
public void run() {
writeAudioData();
}
});
//Start recording thread
recordingThread.start();
}
public void stopRecording() {
isRecording = false;
recorder.stop();
recorder.release();
recorder = null;
recordingThread = null;
}
private void writeAudioData() {
byte data[] = new byte[bufferSize];
while (isRecording) {
recorder.read(data, 0, bufferSize);
send(data);
}
}
private void send(byte[] data) {
int minBufferSize = AudioTrack.getMinBufferSize(8000,
AudioFormat.CHANNEL_CONFIGURATION_MONO,
AudioFormat.ENCODING_PCM_16BIT);
AudioTrack at = new AudioTrack(AudioManager.STREAM_MUSIC, 8000,
AudioFormat.CHANNEL_CONFIGURATION_MONO,
AudioFormat.ENCODING_PCM_16BIT, minBufferSize,
AudioTrack.MODE_STREAM);
at.play();
at.write(data, 0, bufferSize);
at.stop();
at.release();
}
}
答案 0 :(得分:0)
这里是经过审查且运行良好的版本:)
要创建它,我使用了带有活动视图的默认AndroidStudio Hello World应用程序(侧面菜单和浮动按钮,以模仿上面的示例)。它运行时没有错误,您需要对文件进行一些小的修改:
package al.tdb.daf;
//Extra import(s)
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioRecord;
import android.media.AudioTrack;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
// Variables
private static final String TAG = "Aufnahme";
private AudioRecord recorder = null;
private boolean isRecording = false;
private int SAMPLERATE = 8000;
private int CHANNELS = AudioFormat.CHANNEL_CONFIGURATION_MONO;
private int AUDIO_FORMAT = AudioFormat.ENCODING_PCM_16BIT;
private int bufferSize = AudioRecord.getMinBufferSize(SAMPLERATE, CHANNELS, AUDIO_FORMAT);
private Thread recordingThread = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
SetupRecordButtons(); //MOVE THIS OUTSIDE ;)
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
//CUSTOM FUNCTIONS
//below are all the custom function to perform the operations
public void SetupRecordButtons(){
Button startButton = (Button) findViewById(R.id.btnStart);
startButton.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
startRecording();
}
});
Button stopButton = (Button) findViewById(R.id.btnStop);
stopButton.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
stopRecording();
}
});
stopButton.setEnabled(false);
}
public void startRecording() {
recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, SAMPLERATE,
CHANNELS, AUDIO_FORMAT, bufferSize);
recorder.startRecording();
isRecording = true;
recordingThread = new Thread(new Runnable() {
public void run() {
writeAudioData();
}
});
//Start recording thread
recordingThread.start();
Button startButton = (Button) findViewById(R.id.btnStart);
startButton.setEnabled(false);
Button stopButton = (Button) findViewById(R.id.btnStop);
stopButton.setEnabled(true);
TextView indicatorLabel = (TextView) findViewById(R.id.indicatorLabel);
indicatorLabel.setText("recording");
}
public void stopRecording() {
isRecording = false;
recorder.stop();
recorder.release();
recorder = null;
recordingThread = null;
Button startButton = (Button) findViewById(R.id.btnStart);
startButton.setEnabled(true);
Button stopButton = (Button) findViewById(R.id.btnStop);
stopButton.setEnabled(false);
TextView indicatorLabel = (TextView) findViewById(R.id.indicatorLabel);
indicatorLabel.setText("halted");
}
private void writeAudioData() {
byte data[] = new byte[bufferSize];
while (isRecording) {
recorder.read(data, 0, bufferSize);
send(data);
}
}
private void send(byte[] data) {
int minBufferSize = AudioTrack.getMinBufferSize(
8000,
AudioFormat.CHANNEL_CONFIGURATION_MONO,
AudioFormat.ENCODING_PCM_16BIT
);
AudioTrack at = new AudioTrack(
AudioManager.STREAM_MUSIC,
8000,
AudioFormat.CHANNEL_CONFIGURATION_MONO,
AudioFormat.ENCODING_PCM_16BIT,
minBufferSize,
AudioTrack.MODE_STREAM
);
at.play();
at.write(data, 0, bufferSize);
at.stop();
at.release();
}
}
和
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context=".MainActivity"
tools:showIn="@layout/app_bar_main">
<Button
android:id="@+id/btnStart"
android:layout_width="159dp"
android:layout_height="0dp"
android:layout_marginStart="101dp"
android:layout_marginTop="66dp"
android:layout_marginBottom="186dp"
android:text="Start"
app:layout_constraintBottom_toTopOf="@+id/btnStop"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/btnStop"
android:layout_width="154dp"
android:layout_height="0dp"
android:layout_marginStart="101dp"
android:layout_marginBottom="94dp"
android:text="Stop"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/btnStart" />
<TextView
android:id="@+id/indicatorLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
最终结果如下: