0

我对 Android 编程很陌生，如果有人能在这方面帮助我，那就太好了。我的项目包含两个 JAVA 文件。

MainActivity.java 扩展了 Activity
SMSReceiver.java 扩展了 Broadcastreceiver

SMSreceiver.java 具有显示任何传入SMStoast 的代码。你能告诉我在MainActivity收到特定短信时如何调用函数吗？例如：当我收到称为 starttemp 的短信时，它应该调用一个函数 starttemp。

我搜索了很多，发现意图是一种方法，我们不能直接调用这些方法。请问有人可以帮我吗？如果有人可以将工作代码发送给我，那就太好了。

这将是我的 MainActivity.Java 

package com.wissen.sms;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;
import android.widget.EditText;  
import android.widget.Button;
import android.widget.ToggleButton;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Set;
import java.util.UUID;

@SuppressLint({ "NewApi", "NewApi", "NewApi", "NewApi", "NewApi", "NewApi", "NewApi", "NewApi", "NewApi", "NewApi" }) public class MainActivity extends Activity 
{
    TextView myLabel;
    EditText myTextbox;
    ToggleButton switch1;


    BluetoothAdapter mBluetoothAdapter;
    BluetoothSocket mmSocket;
    BluetoothDevice mmDevice;
    OutputStream mmOutputStream;
    InputStream mmInputStream;
    Thread workerThread;
    byte[] readBuffer;
    int readBufferPosition;
    int counter;
    String status;
    volatile boolean stopWorker;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Button openButton = (Button)findViewById(R.id.open);
        Button sendButton = (Button)findViewById(R.id.send);
        Button closeButton = (Button)findViewById(R.id.close);
        myLabel = (TextView)findViewById(R.id.label);
        myTextbox = (EditText)findViewById(R.id.entry);




      //switch1
        switch1 = (ToggleButton) findViewById(R.id.switch1);
        switch1.setOnClickListener(new OnClickListener()
            {
            public void onClick(View v)
            {
                if(switch1.isChecked()){
                    try 
                {
                    String msg = "01ON";
                    msg += "\n\r";
                    mmOutputStream.write(msg.getBytes());
                    myLabel.setText("Data Sent");
                }
                catch (IOException ex) { }

                }else{
                    try 
                {
                    String msg = "01OF";
                    msg += "\n\r";
                    mmOutputStream.write(msg.getBytes());
                    myLabel.setText("Data Sent");

                }
                catch (IOException ex) { }
                }
             }

             });


        //Open Button
        openButton.setOnClickListener(new View.OnClickListener()
        {
            public void onClick(View v)
            {
                try 
                {
                    findBT();
                    openBT();
                }
                catch (IOException ex) { }
            }
        });

        //Send Button
        sendButton.setOnClickListener(new View.OnClickListener()
        {
            public void onClick(View v)
            {
                try 
                {
                    sendData();
                }
                catch (IOException ex) { }
            }
        });

        //Close button
        closeButton.setOnClickListener(new View.OnClickListener()
        {
            public void onClick(View v)
            {
                try 
                {
                    closeBT();
                }
                catch (IOException ex) { }
            }
        });


    }

    void findBT()
    {
        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        if(mBluetoothAdapter == null)
        {
            myLabel.setText("No bluetooth adapter available");
        }

        if(!mBluetoothAdapter.isEnabled())
        {
            Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(enableBluetooth, 0);
        }

        Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
        if(pairedDevices.size() > 0)
        {
            for(BluetoothDevice device : pairedDevices)
            {
                if(device.getName().equals("HomeAutomation")) 
                {
                    mmDevice = device;
                    break;
                }
            }
        }
        myLabel.setText("Bluetooth Device Found");
    }

    void openBT() throws IOException
    {
        UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb"); //Standard SerialPortService ID
        mmSocket = mmDevice.createRfcommSocketToServiceRecord(uuid);        
        mmSocket.connect();
        mmOutputStream = mmSocket.getOutputStream();
        mmInputStream = mmSocket.getInputStream();

        beginListenForData();

        myLabel.setText("Bluetooth Opened");
    }

    void beginListenForData()
    {   
        final Handler handler = new Handler(); 
        final byte delimiter = 10; //This is the ASCII code for a newline character

        stopWorker = false;
        readBufferPosition = 0;
        readBuffer = new byte[1024];
        workerThread = new Thread(new Runnable()
        {
            public void run()
            {               
               while(!Thread.currentThread().isInterrupted() && !stopWorker)
               {
                    try 
                    {


                        int bytesAvailable = mmInputStream.available();                        
                        if(bytesAvailable > 0)
                        {
                            byte[] packetBytes = new byte[bytesAvailable];
                            mmInputStream.read(packetBytes);
                            for(int i=0;i<bytesAvailable;i++)
                            {
                                byte b = packetBytes[i];
                                if(b == delimiter)
                                {
                                    byte[] encodedBytes = new byte[readBufferPosition];
                                    System.arraycopy(readBuffer, 0, encodedBytes, 0, encodedBytes.length);
                                    final String data = new String(encodedBytes, "US-ASCII");
                                    readBufferPosition = 0;

                                    handler.post(new Runnable()
                                    {
                                        public void run()
                                        {   
                                            status=data;
                                            myLabel.setText(data);
                                        }
                                    });
                                }
                                else
                                {
                                    readBuffer[readBufferPosition++] = b;
                                }
                            }
                        }
                    } 
                    catch (IOException ex) 
                    {
                        stopWorker = true;
                    }
               }
            }
        });

        workerThread.start();
    }


    void sendData() throws IOException
    {
        String msg = myTextbox.getText().toString();
        msg += "\n\r";
        mmOutputStream.write(msg.getBytes());
        myLabel.setText("Data Sent");
    }

    void closeBT() throws IOException
    {
        stopWorker = true;
        mmOutputStream.close();
        mmInputStream.close();
        mmSocket.close();
        myLabel.setText("Bluetooth Closed");
    }
}

这将是我的 SMSReceiver.Java 

package com.wissen.sms.receiver;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.gsm.SmsMessage;
import android.widget.Toast;


public class SMSReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Bundle bundle = intent.getExtras();

        Object messages[] = (Object[]) bundle.get("pdus");
        SmsMessage smsMessage[] = new SmsMessage[messages.length];
        for (int n = 0; n < messages.length; n++) {
            smsMessage[n] = SmsMessage.createFromPdu((byte[]) messages[n]);
        }

        Toast toast = Toast.makeText(context, "Received SMS: " + smsMessage[0].getMessageBody(), Toast.LENGTH_LONG);
        toast.show();
    }
}

现在我想在收到新消息时调用 MainActivity.java 的方法

void somemethod()
{

try 
{
            String msg = "01ON";
                msg += "\n\r";
                mmOutputStream.write(msg.getBytes());
                myLabel.setText("Data Sent");
}
catch (IOException ex) { }



}
}
4

1 回答 1

2

从广播接收器类中使用 MainActivity 方法的一种最佳方法是

将您的方法定义为静态方法，然后您可以使用以下代码使用该方法

Activityname.methodname()

我试过这个，它对我来说很好。

例如

public class SMSBroadcastReceiver extends BroadcastReceiver {

    private static final String SMS_RECEIVED = "android.provider.Telephony.SMS_RECEIVED";
    private static final String TAG = "SMSBroadcastReceiver";

    @Override
    public void onReceive(Context context, Intent intent) {
         Log.i(TAG, "Intent recieved: " + intent.getAction());

            if (intent.getAction() == SMS_RECEIVED) {
                Bundle bundle = intent.getExtras();
                if (bundle != null) {
                    Object[] pdus = (Object[])bundle.get("pdus");

                     abc.methodtocall();

                }
            }
       }
}

和你这样的活动代码

public class abc extends Activity{


@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
}

public static void methodtocall(){

    //Your code here...

}

}

于 2012-11-01T10:50:40.533 回答