嗨，我对Android编程比较陌生。我正在做一个项目，要求我开发一个应用程序来连接到一个有8个按钮的设备。
该设备通过蓝牙连接到我的Android手机
Android手机=三星Galaxy S4
Android版本= 5.0.1
API = 21
因此，当用户按下按钮时，该设备将在主UI上发送，读取和显示蓝牙数据为0。
1 =未按下按钮。 0 =按下按钮。
所以它都标记为Pins。
Pin 1 [0] - ＆gt;按下设备上的按钮
Pin 2 [1]
Pin 3 [1]
Pin 4 [1]
Pin 5 [1]
Pin 6 [1]
Pin 7 [1]
Pin 8 [1]
问题是，我需要在点击按钮时发出声音。
公共类MainActivity扩展了SherlockFragmentActivity {
private DrawerLayout drawerLayout;
private ListView drawerList;
private ActionBarDrawerToggle drawerToggle;
private MenuItem startRecord, stopRecord;
private CharSequence title;
private CharSequence drawerTitle;
private String[] navTitles;
private TypedArray navIcons;
private ArrayList<NavDrawerItem> drawerItems;
private NavDrawerListAdapter adapter;
public static SharedPreferences sp;
private Device device;
private List<Integer> buttonPins;
private SparseArray<Pin> pins;
private Timer timer;
private Timer myTimer;
private TimerTask timerTask;
private TimerTask myTimerTask;
private boolean timerFlag;
private int timeout = 3000;
private ProgressDialog progress;
public static int position = 0;
private boolean active;
public static final int MESSAGE_STATE_CHANGE = 1;
public static final int MESSAGE_READ = 2;
public static final int MESSAGE_DEVICE_NAME = 3;
public static final int MESSAGE_TOAST = 4;
private static final boolean D = true;
private static final String TAG = "MusicFragment";
private String mConnectedDeviceName = null;
public static final String DEVICE_NAME = "device_name";
public static final String TOAST = "toast";
private BluetoothAdapter mBluetoothAdapter;
private static final int REQUEST_CONNECT_DEVICE = 1;
private static final int REQUEST_ENABLE_BT = 2;
private BTService mBTService = null;
public TextView btMsgTxt;
public Uri uriInstrument;
public ImageView imgInstrument;
public BootstrapButton btnReconnect;
public BootstrapButton btnReselect;
SoundPool instrumentSound;
int recorder1;
int recorder2;
int recorder3;
int recorder4;
int recorder5;
int recorder6;
int recorder7;
int recorder8;
int saxophone1;
int saxophone2;
int saxophone3;
int saxophone4;
int saxophone5;
int saxophone6;
int saxophone7;
int saxophone8;
int bell;
private PinInfo mPinInfo;
private InstrumentSensor mInstrumentSensor;
private HarpPlayer mHarpPlayer;
private RecorderPlayer mRecorderPlayer;
private SaxophonePlayer mSaxophonePlayer;
private BellPlayer mBellPlayer;
private SoundfilePlayer mPlayer;
private boolean mIsplaying;
private InstrumentSoundfiles mInstrumentSoundfiles;
private ArrayList<Integer> currentInstruments;
Timer mTimer;
private boolean mIstimerrunning;
TimerTask retrievePinInfoTask;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sp = PreferenceManager.getDefaultSharedPreferences(this);
mBluetoothAdapter = BluetoothActivity.mBluetoothAdapter;
btMsgTxt = (TextView)findViewById(R.id.tv_btMsg);
imgInstrument = (ImageView)findViewById(R.id.iv_instrument);
btnReconnect = (BootstrapButton) findViewById(R.id.btn_reconnect);
btnReselect = (BootstrapButton) findViewById(R.id.btn_reselect);
loadSound();
btnReconnect.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mBTService = null;
startBTService();
}
});
btnReselect.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
Intent i = new Intent(MainActivity.this,BluetoothActivity.class);
startActivity(i);
finish();
}
});
//UI for side drawer
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
drawerList = (ListView) findViewById(R.id.left_drawer);
navTitles = getResources().getStringArray(R.array.drawer_titles);
navIcons = getResources().obtainTypedArray(R.array.drawer_icons);
title = drawerTitle = getTitle();
// Set a custom shadow that overlays the main content when the drawer opens
drawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
// Set up the drawer's list view with items and click listener
drawerItems = new ArrayList<NavDrawerItem>();
drawerItems.add(new NavDrawerItem(navTitles[0], navIcons.getResourceId(0, -1))); // Music
drawerItems.add(new NavDrawerItem(navTitles[1], navIcons.getResourceId(1, -1))); // Profile
drawerItems.add(new NavDrawerItem(navTitles[2], navIcons.getResourceId(2, -1))); // Setting
drawerItems.add(new NavDrawerItem(navTitles[3], navIcons.getResourceId(3, -1))); // Guide
navIcons.recycle();
adapter = new NavDrawerListAdapter(getApplicationContext(), drawerItems);
drawerList.setAdapter(adapter);
drawerList.setOnItemClickListener(new DrawerItemClickListener());
// Enable ActionBar app icon to behave as action to toggle nav drawer
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
// ActionBarDrawerToggle ties together the the proper interactions between the sliding drawer and the action bar app icon
drawerToggle = new ActionBarDrawerToggle(this, /* Host Activity */ drawerLayout, /* DrawerLayout object */
R.drawable.icon_drawer, /* nav drawer image to replace 'Up' caret */
R.string.drawer_open, /* "open drawer" description for accessibility */
R.string.drawer_close /* "close drawer" description for accessibility */
) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(title);
invalidateOptionsMenu(); // Creates call to onPrepareOptionsMenu()
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(drawerTitle);
invalidateOptionsMenu(); // Creates call to onPrepareOptionsMenu()
}
};
drawerLayout.setDrawerListener(drawerToggle);
if (savedInstanceState == null) {
selectItem(0);
}
MainActivity.this.setVolumeControlStream(AudioManager.STREAM_MUSIC);
mInstrumentSoundfiles = ((NinjaTrackApplication)getApplication()).getInstrumentSoundfiles();
mInstrumentSensor = new InstrumentSensor(mInstrumentSoundfiles);
mIsplaying = false;
mPlayer = null;
currentInstruments = new ArrayList<Integer>();
}
@Override
protected void onResume() {
startBTService();
super.onResume();
}
@Override
protected void onStart() {
super.onStart();
startBTService();
active = true;
}
private void startBTService() {
// If BT is not on, request that it be enabled.
// setupBTConnSession() will then be called during onActivityResult
if (mBluetoothAdapter != null)
{
if (!mBluetoothAdapter.isEnabled()) {
Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
// Otherwise, setup the Bluetooth connection session
} else {
if (mBTService == null) {
setupBTConnSession();
}
connectMe();
}
}
else
{
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
}
}
private void setupBTConnSession() {
Log.d(TAG, "setupBTConnSession()");
// Initialize the BTService to perform bluetooth connections
mBTService = new BTService(mHandler);
}
Handler mHandler = new Handler()
{
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MESSAGE_STATE_CHANGE:
if(D) Log.i(TAG, "mHandler-MESSAGE_STATE_CHANGE: " + msg.arg1);
switch (msg.arg1) {
case BTService.STATE_CONNECTED:
btMsgTxt.setText("Status: Connected to " + mConnectedDeviceName + "!");
btnReconnect.setVisibility(View.INVISIBLE);
btnReselect.setVisibility(View.INVISIBLE);
break;
case BTService.STATE_CONNECTING:
btMsgTxt.setText("Status: Connecting!");
uriInstrument = Uri.parse("android.resource://nyp.fypj.ninjatrack/" + R.drawable.ninjatracklogo);
imgInstrument.setImageURI(null);
imgInstrument.setImageURI(uriInstrument);
break;
case BTService.STATE_LISTEN:
case BTService.STATE_NONE:
uriInstrument = Uri.parse("android.resource://nyp.fypj.ninjatrack/" + R.drawable.ninjatracklogo);
imgInstrument.setImageURI(null);
imgInstrument.setImageURI(uriInstrument);
btMsgTxt.setText("Status: Not Connected!");
btnReconnect.setVisibility(View.VISIBLE);
btnReselect.setVisibility(View.VISIBLE);
}
break;
case MESSAGE_READ:
byte[] readBuf = (byte[]) msg.obj;
Analyzer pinAnalyzer = new Analyzer();
String instrument = "";
if(pinAnalyzer.populatePinInfo(readBuf,msg.arg1)){ //populate all Pins
try {
mPinInfo = pinAnalyzer.populatePin(readBuf, msg.arg1);
if(mPinInfo.figure == 4)
{
//saxophone
playSaxophone();
}
else if(mPinInfo.figure == 5)
{
//recorder
playRecorder();
}
Log.i(TAG, "mHandler-MESSAGE_READ: " + mPinInfo);
btMsgTxt.setText("******\n" + mPinInfo + "\n******");
}
catch(Exception e)
{
}
}
break;
}
}
};
private void connectMe() {
String deviceName = "FireFly-9A97";
BluetoothDevice result = null;
Set<BluetoothDevice> devices = mBluetoothAdapter.getBondedDevices();
if (devices != null) {
for (BluetoothDevice device : devices) {
if (deviceName.equals(device.getName())) {
result = device;
break;
}
}
}
// Attempt to connect to the device
if (result != null)
mBTService.connect(result);
}
private void loadSound()
{
new Thread(new Runnable() {
@Override
public void run() {
instrumentSound = new SoundPool(10,AudioManager.STREAM_MUSIC,0);
recorder1 = instrumentSound.load(MainActivity.this,R.raw.recorder1,1);
recorder2 = instrumentSound.load(MainActivity.this,R.raw.recorder2,1);
recorder3 = instrumentSound.load(MainActivity.this,R.raw.recorder3,1);
recorder4 = instrumentSound.load(MainActivity.this,R.raw.recorder4,1);
recorder5 = instrumentSound.load(MainActivity.this,R.raw.recorder5,1);
recorder6 = instrumentSound.load(MainActivity.this,R.raw.recorder6,1);
recorder7 = instrumentSound.load(MainActivity.this,R.raw.recorder7,1);
recorder8 = instrumentSound.load(MainActivity.this,R.raw.recorder8,1);
saxophone1 = instrumentSound.load(MainActivity.this,R.raw.saxophone1,1);
saxophone2 = instrumentSound.load(MainActivity.this,R.raw.saxophone2,1);
saxophone3 = instrumentSound.load(MainActivity.this,R.raw.saxophone3,1);
saxophone4 = instrumentSound.load(MainActivity.this,R.raw.saxophone4,1);
saxophone5 = instrumentSound.load(MainActivity.this,R.raw.saxophone5,1);
saxophone6 = instrumentSound.load(MainActivity.this,R.raw.saxophone6,1);
saxophone7 = instrumentSound.load(MainActivity.this,R.raw.saxophone7,1);
saxophone8 = instrumentSound.load(MainActivity.this,R.raw.saxophone8,1);
bell = instrumentSound.load(MainActivity.this, R.raw.bell,1);
}
}).start();
}
private void playRecorder()
{
new Thread(new Runnable() {
@Override
public void run() {
try {
if (mPinInfo.btn1 == 0) {
instrumentSound.play(recorder1, 1, 1, 1, 0, 1);
}
if (mPinInfo.btn2 == 0) {
instrumentSound.play(recorder2, 1, 1, 1, 0, 1);
}
if (mPinInfo.btn3 == 0) {
instrumentSound.play(recorder3, 1, 1, 1, 0, 1);
}
if (mPinInfo.btn4 == 0) {
instrumentSound.play(recorder4, 1, 1, 1, 0, 1);
}
if (mPinInfo.btn5 == 0) {
instrumentSound.play(recorder5, 1, 1, 1, 0, 1);
}
if (mPinInfo.btn6 == 0) {
instrumentSound.play(recorder6, 1, 1, 1, 0, 1);
}
if (mPinInfo.btn7 == 0) {
instrumentSound.play(recorder7, 1, 1, 1, 0, 1);
}
if (mPinInfo.btn8 == 0) {
instrumentSound.play(recorder8, 1, 1, 1, 0, 1);
}
}
catch (Exception ex) {
}
}
}).start();
}
private void playBell(final PinInfo pi)
{
new Thread(new Runnable() {
@Override
public void run() {
try {
if(pi.accX > 30)
{
}
}
catch (Exception ex) {
}
}
}).start();
}
private void playSaxophone()
{
new Thread(new Runnable() {
@Override
public void run() {
try {
if (mPinInfo.btn1 == 0) {
instrumentSound.play(saxophone1, 1, 1, 1, 0, 1);
}
if (mPinInfo.btn2 == 0) {
instrumentSound.play(saxophone2, 1, 1, 1, 0, 1);
}
if (mPinInfo.btn3 == 0) {
instrumentSound.play(saxophone3, 1, 1, 1, 0, 1);
}
if (mPinInfo.btn4 == 0) {
instrumentSound.play(saxophone4, 1, 1, 1, 0, 1);
}
if (mPinInfo.btn5 == 0) {
instrumentSound.play(saxophone5, 1, 1, 1, 0, 1);
}
if (mPinInfo.btn6 == 0) {
instrumentSound.play(saxophone6, 1, 1, 1, 0, 1);
}
if (mPinInfo.btn7 == 0) {
instrumentSound.play(saxophone7, 1, 1, 1, 0, 1);
}
if (mPinInfo.btn8 == 0) {
instrumentSound.play(saxophone8, 1, 1, 1, 0, 1);
}
}
catch (Exception ex) {
}
}
}).start();
}
@Override
protected void onStop() {
super.onStop();
//instrumentSound.release();
active = false;
}
当声音响起时，它播放得很好，但有一点失真。目前尚不清楚。
由于我需要产生的声音与乐器类似，声音必须是连续的，就好像有人在播放录音机/萨克斯管一样。
声音也必须混合，例如，如果我同时按下2个按钮，音频必须混合。
我需要提示/建议。谢谢
答案 0 :(得分：0)
如果你想使用短声音并希望它们混合，soundPool是正确的。在youtube上观看这个视频， - https://www.youtube.com/watch?v=L8gEJqGCY28他已经建立了类似的东西。对于失真 - 尝试使用较低的采样率。