我正在处理一个由两个类组成的项目。第一个是MainActivity.java，它处理通过蓝牙连接发送单个字符。第二个是SmsReceiver.java，它是一个广播接收器，用于检测传入的sms消息。当SmsReceiver.java检测到传入消息时，它应该调用clickLedOn方法，该方法驻留在蓝牙类中。
我测试了他们两个并且他们的工作。然后我尝试通过在广播接收器的MainActivity.turnLedOn(context);方法中调用onReceive来连接它们，但它没有用。
有人知道为什么以及应采取什么措施来解决这个问题？以下是整个项目的代码。
提前谢谢。
MainActivity.java
package com.example.bluetooth;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Set;
import java.util.UUID;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
//You first have to connect with your android phone to the arduino bt module.
BluetoothAdapter mBluetoothAdapter = null;
ConnectThread mConnectThread = null;
BluetoothDevice mDevice = null;
public static ConnectedThread mConnectedThread = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Button button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
mConnectedThread.write("1".getBytes());
}
});
final Button button2 = (Button) findViewById(R.id.button2);
button2.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
mConnectedThread.write("0".getBytes());
}
});
BluetoothDevice mDevice = null;
//Check if phone supports bluetooth
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
// Device does not support Bluetooth
}
Toast.makeText(this, "BT supported", Toast.LENGTH_SHORT).show();
Log.e("BLUETOOTH", "BT supported");
// Check if bluetooth is enabled. If not, enable it.
if (!mBluetoothAdapter.isEnabled()) {
Toast.makeText(this, "BT disabled", Toast.LENGTH_SHORT).show();
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, 1);
}
Toast.makeText(this, "BT enabled", Toast.LENGTH_SHORT).show();
Log.e("BLUETOOTH", "BT enabled");
// Chech which device we connected with, at the beginning
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
if (pairedDevices.size() > 0) {
Toast.makeText(this, "Paired with a BT device", Toast.LENGTH_SHORT).show();
Log.e("BLUETOOTH", "paired with a BT device");
for (BluetoothDevice device : pairedDevices) {
Toast.makeText(this, device.getName() + " " + device.getAddress(), Toast.LENGTH_SHORT).show();
mDevice = device;
}
}
// Source 7 - Creating the connection thread
mConnectThread = new ConnectThread(mDevice);
mConnectThread.start();
}
public static void turnLedOn(Context context){
mConnectedThread.write("1".getBytes());
}
public static void turnLedOff(Context context){
mConnectedThread.write("0".getBytes());
}
@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;
}
//Thread which creates a connection between arduino and phone
private class ConnectThread extends Thread {
private final BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
private final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");
public ConnectThread(BluetoothDevice device) {
BluetoothSocket tmp = null;
mmDevice = device;
try {
tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) { }
mmSocket = tmp;
}
public void run() {
mBluetoothAdapter.cancelDiscovery();
try {
mmSocket.connect();
} catch (IOException connectException) {
try {
mmSocket.close();
} catch (IOException closeException) { }
return;
}
//Source 10 - create the data transfer thread
//Manage connection
mConnectedThread = new ConnectedThread(mmSocket);
mConnectedThread.start();
}
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) { }
}
}
// end of connection thread
//Thread for sending and receiving messages
private class ConnectedThread extends Thread {
private final BluetoothSocket mmSocket;
private final InputStream mmInStream;
private final OutputStream mmOutStream;
public ConnectedThread(BluetoothSocket socket) {
mmSocket = socket;
InputStream tmpIn = null;
OutputStream tmpOut = null;
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) {
}
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run() {
byte[] buffer = new byte[1024];
int begin = 0;
int bytes = 0;
while (true) {
try {
bytes += mmInStream.read(buffer, bytes, buffer.length
- bytes);
for (int i = begin; i < bytes; i++) {
if (buffer[i] == "#".getBytes()[0]) {
mHandler.obtainMessage(1, begin, i, buffer)
.sendToTarget();
begin = i + 1;
if (i == bytes - 1) {
bytes = 0;
begin = 0;
}
}
}
} catch (IOException e) {
break;
}
}
}
public void write(byte[] bytes) {
try {
mmOutStream.write(bytes);
} catch (IOException e) {
}
}
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
}
}
}
//End of thread for sending and receiving
//Source 9 - handler for sending
Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
byte[] writeBuf = (byte[]) msg.obj;
int begin = (int) msg.arg1;
int end = (int) msg.arg2;
switch (msg.what) {
case 1:
String writeMessage = new String(writeBuf);
writeMessage = writeMessage.substring(begin, end);
break;
}
}
};
}
SmsReceiver.java
package com.example.bluetooth;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;
import android.widget.Toast;
public class SmsReceiver extends BroadcastReceiver
{
@Override
public void onReceive(Context context, Intent intent)
{
//---get the SMS message passed in---
Bundle bundle = intent.getExtras();
SmsMessage[] msgs = null;
String messageReceived = "";
if (bundle != null)
{
//---retrieve the SMS message received---
Object[] pdus = (Object[]) bundle.get("pdus");
msgs = new SmsMessage[pdus.length];
for (int i=0; i<msgs.length; i++)
{
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
messageReceived += msgs[i].getMessageBody().toString();
messageReceived += "\n";
}
//---display the new SMS message---
Toast.makeText(context, messageReceived, Toast.LENGTH_SHORT).show();
MainActivity.turnLedOn(context);
// Get the Sender Phone Number
String senderPhoneNumber=msgs[0].getOriginatingAddress ();
}
}
}
MainActivity布局
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<Button
android:id="@+id/button1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_below="@+id/textView1"
android:layout_marginTop="34dp"
android:text="On" />
<Button
android:id="@+id/button2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button1"
android:layout_below="@+id/button1"
android:layout_marginTop="68dp"
android:text="Off" />
</RelativeLayout>
的AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.bluetooth"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<receiver android:name=".SmsReceiver">
<intent-filter>
<action android:name=
"android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
<activity
android:name="com.example.bluetooth.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>
</application>
<uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission>
</manifest>
编辑：在@ donison24x7建议的清单中注册广播接收器。
Edit2：对此感到抱歉。还在清单中添加了RECEIVE_SMS权限。它现在有效。
答案 0 :(得分：2)
您尚未注册广播接收器＆＃39; SmsReceiver.java＆＃39;在清单中。 像这样注册.....
<receiver
android:name=".SmsReceiver" >
<intent-filter>
<action android:name="your.Action.name" />
</intent-filter>
</receiver>
答案 1 :(得分：1)
一种可能的解决方案是使用LocalBroadcastManager在您的接收者类和您的活动类之间进行通信：
使用以下命令在onReceive（）的接收器类中启动一个Intent：
Intent i = new Intent("NameYourIntentHere");
LocalBroadcastManager.getInstance(context).sendBroadcast(i);
在您的Activity类中获取LocalBroadcast意图：
private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// Do your stuff here
}
};
在您的活动类中注册您的LocalBroadcast接收器，以便收到通知：
@Override
protected void onPause() {
super.onPause();
LocalBroadcastManager.getInstance(this).unregisterReceiver(mBroadcastReceiver);
}
@Override
protected void onResume() {
super.onResume();
LocalBroadcastManager.getInstance(this).registerReceiver(mBroadcastReceiver,
new IntentFilter("NameYourIntentHere"));
}