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在調用活動的非靜態方法我想從活動B 調用非靜態方法在我的活動一個像從另一個活動
class A extend Activity(){ public void c(){}}
class B extend Activity(){ A.C(); }
我怎麼能在Android的活動做到這一點幫助我。
public class Voice extends Activity {
TextView resultTEXT ;
MediaPlayer mp;
ImageView view;
private BluetoothAdapter btAdapter = null;
private BluetoothSocket btSocket = null;
int page;
// SPP UUID service
private static final UUID BTMODULEUUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
// String for MAC address
private static String address;
private static String status;
BluetoothDevice device;
private ConnectedThread mConnectedThread;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_voice);
//get the stored mac address of the device
SharedPreferences shared = getSharedPreferences("BtAddress", MODE_PRIVATE);
address = (shared.getString("btAddress", ""));
status = (shared.getString("connect", ""));
btAdapter = BluetoothAdapter.getDefaultAdapter();
//create device and set the MAC address
device = btAdapter.getRemoteDevice(address);
checkBTState();
if(status=="true")
{
new CountDownTimer(1000, 10000) {
public void onTick(long millisUntilFinished) {
}
public void onFinish() {
mp = MediaPlayer.create(Voice.this, R.drawable.onload);
mp.setLooping(false);
mp.start();
}
}.start();
}
view=(ImageView)findViewById(R.id.imageButton);
view.setOnTouchListener(new View.OnTouchListener() {
Handler handler = new Handler();
int numberOfTaps = 0;
long lastTapTimeMs = 0;
long touchDownMs = 0;
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_UP:
touchDownMs = System.currentTimeMillis();
break;
case MotionEvent.ACTION_DOWN:
handler.removeCallbacksAndMessages(null);
if ((System.currentTimeMillis() - touchDownMs) > ViewConfiguration.getTapTimeout()) {
//it was not a tap
numberOfTaps = 0;
lastTapTimeMs = 0;
break;
}
if (numberOfTaps > 0
&& (System.currentTimeMillis() - lastTapTimeMs) < ViewConfiguration.getDoubleTapTimeout()) {
numberOfTaps += 1;
} else {
numberOfTaps = 1;
}
lastTapTimeMs = System.currentTimeMillis();
if (numberOfTaps == 2) {
handler.postDelayed(new Runnable() {
@Override
public void run() {
//handle double tap
Toast.makeText(Voice.this, "Help", Toast.LENGTH_LONG).show();
mp = MediaPlayer.create(Voice.this, R.drawable.help);
mp.setLooping(false);
mp.start();
}
}, ViewConfiguration.getDoubleTapTimeout());
}
else if(numberOfTaps== 1)
{
handler.postDelayed(new Runnable() {
@Override
public void run() {
Toast.makeText(Voice.this, "proceed",Toast.LENGTH_LONG).show();
Intent intent=new Intent(Voice.this,ChangeSpeed.class);
startActivity(intent);
}
}, ViewConfiguration.getTapTimeout());
}
}
return true;
}
});
}
public void onActivityResult(int request_result, int result_code, Intent i)
{
super.onActivityResult(result_code, result_code, i);
switch (result_code)
{
case 100: if(result_code == RESULT_OK && i != null)
{
ArrayList<String> result = i.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
resultTEXT.setText(result.get(0));
}
break;
}
}
@Override
public void onResume() {
super.onResume();
try
{
btSocket = createBluetoothSocket(device);
}
catch (IOException e)
{
Toast.makeText(getBaseContext(), "Socket creation failed", Toast.LENGTH_LONG).show();
}
// Establish the Bluetooth socket connection.
try
{
btSocket.connect();
}
catch (IOException e)
{
try
{
btSocket.close();
}
catch (IOException e2)
{
Log.e("",""+e2);
}
}
mConnectedThread = new ConnectedThread(btSocket);
mConnectedThread.start();
// send a character when resuming.beginning transmission to check device is connected
//If it is not an exception will be thrown in the write method and finish() will be called
mConnectedThread.write("x");
}
private BluetoothSocket createBluetoothSocket(BluetoothDevice device) throws IOException {
return device.createRfcommSocketToServiceRecord(BTMODULEUUID);
}
@Override
public void onPause()
{
super.onPause();
try
{
// Bluetooth sockets close when leaving activity
btSocket.close();
} catch (IOException e2)
{
Log.e("",""+e2);
}
}
/*
//Checks that the Android device Bluetooth is available turned on if off automatically
*/
private void checkBTState()
{
if(btAdapter==null)
{
Toast.makeText(getBaseContext(), "Device does not support bluetooth", Toast.LENGTH_LONG).show();
} else
{
if (btAdapter.isEnabled())
{
}
else
{
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, 1);
}
}
}
private class ConnectedThread extends Thread {
// private final InputStream mmInStream;
private final OutputStream mmOutStream;
//creation of the connect thread
public ConnectedThread(BluetoothSocket socket)
{
// InputStream tmpIn = null;
OutputStream tmpOut = null;
try
{
//Create I/O streams for connection
// tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
}
catch (IOException e)
{
}
//mmInStream = tmpIn;
mmOutStream = tmpOut;
}
//write method
public void write(String input)
{
byte[] msgBuffer = input.getBytes();
//converts entered String into bytes
try
{
mmOutStream.write(msgBuffer);
} catch (IOException e)
{
//if you cannot write, close the application
Toast.makeText(getBaseContext(), "Connection Failure", Toast.LENGTH_LONG).show();
finish();
}
}
}
/*
method to on the Fan
*/
public void functionFanOn()
{
mConnectedThread.write("1");
// Send "1" via Bluetooth
Toast.makeText(getBaseContext(), "Turn on Fan", Toast.LENGTH_SHORT).show();
Log.e("", "On");
}
functionFanOn（）是我想在B到呼叫
你爲什麼要這樣？ 該方法的目的是什麼？ – raxelsson
你不能。你能指定目的嗎？ – Stefan
嗯，我想連接到藍牙，我有類A的方法發送信號給Arduino在那個類我創建連接，所以在類B中，當用戶點擊按鈕我想發送信號給Arduino調用A類的方法 –