从广播接收器android调用活动方法? [英] Call activity method from broadcast receiver android?

问题描述

在我的应用程序中，我正在向手机发送端口SMS. 收到消息后，我需要在活动中执行一些任务并更新UI.

In my application I am sending a port SMS to the mobile. And when the message is recieved I need to perform some task in my activity and update the UI.

收件人的舱单声明

 <receiver android:name="com.vfi.BinarySMSReceiver" >
        <intent-filter android:priority="10" >
            <action android:name="android.intent.action.DATA_SMS_RECEIVED" />

            <data
                android:host="*"
                android:port="9512"
                android:scheme="sms" />
        </intent-filter>
    </receiver>

接收器类

public class BinarySMSReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    Bundle bundle = intent.getExtras();
    SmsMessage[] msgs = null;

    if (null != bundle) {
        String info = "SMS from ";
        String sender = "";
        String msg = "";

        Object[] pdus = (Object[]) bundle.get("pdus");

        msgs = new SmsMessage[pdus.length];
        byte[] data = null;

        for (int i = 0; i < msgs.length; i++) {
            msgs[i] = SmsMessage.createFromPdu((byte[]) pdus[i]);
            sender += msgs[i].getOriginatingAddress();
            info += msgs[i].getOriginatingAddress() + "\n";

            data = msgs[i].getUserData();

            for (int index = 0; index < data.length; ++index) {
                info += Character.toString((char) data[index]);
                msg += Character.toString((char) data[index]);
            }
        }
        Log.e("SakjsdMS", "akjsdhkas" + msg);
        Log.e("sender", "asdasdasdasdasdasd" + info);

        ((VerifyActivity)context).msgReceived(msg);
    }
}
}

活动中的方法

public  void msgReceived(String msgContent)
{
    if(msgContent.equalsIgnoreCase(etMobile.getText().toString().trim())){
        showToast("Number Verified");
    }else{
        showToast("Sorry wrong number. Input your number again.");
    }

}

我得到的异常

java.lang.RuntimeException: Unable to start receiver com.vfi.BinarySMSReceiver: java.lang.ClassCastException: android.app.ReceiverRestrictedContext cannot be cast to com.vfi.VerifyActivity
        at android.app.ActivityThread.handleReceiver(ActivityThread.java:2467)
        at android.app.ActivityThread.access$1700(ActivityThread.java:145)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1319)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:136)
        at android.app.ActivityThread.main(ActivityThread.java:5127)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:641)
        at dalvik.system.NativeStart.main(Native Method)
 Caused by: java.lang.ClassCastException: android.app.ReceiverRestrictedContext cannot be cast to com.vfi.VerifyActivity
        at com.vfi.BinarySMSReceiver.onReceive(BinarySMSReceiver.java:46)
        at android.app.ActivityThread.handleReceiver(ActivityThread.java:2460)

在android.app.ActivityThread.access $ 1700(ActivityThread.java:145)

            at android.app.ActivityThread.access$1700(ActivityThread.java:145)

如何在接收者中获取活动上下文来调用我的方法?

How can I get activity context in reciever to call my method??

推荐答案

我能够通过以编程方式声明接收方来解决此问题:

I was able to solve it by declaring receiver programmatically:

在发送消息之前的活动中

In the activity befor sending the message

private void sendSMS() {
    BinarySMSReceiver smsReceiver = null;
    smsReceiver = new BinarySMSReceiver();
    smsReceiver.setActivityHandler(this);
    IntentFilter portIntentFilter = new IntentFilter("android.intent.action.DATA_SMS_RECEIVED");
    portIntentFilter.addDataAuthority("*", "9512");
    portIntentFilter.addDataScheme("sms");
    registerReceiver(smsReceiver, portIntentFilter);



        String messageText = etMobile.getText().toString().trim();
        short SMS_PORT = 9512;
        SmsManager smsManager = SmsManager.getDefault();
        smsManager.sendDataMessage(etMobile.getText().toString().trim(), null, SMS_PORT, messageText.getBytes(), null, null);
}

在接收器类中

 public class BinarySMSReceiver extends BroadcastReceiver {
    VerifyActivity vAct = null;

    void setActivityHandler(VerifyActivity main) {
        vAct = main;
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        Bundle bundle = intent.getExtras();
        SmsMessage[] msgs = null;

        if (null != bundle) {
            String info = "SMS from ";
            String sender = "";
            String msg = "";

            Object[] pdus = (Object[]) bundle.get("pdus");

            msgs = new SmsMessage[pdus.length];
            byte[] data = null;

            for (int i = 0; i < msgs.length; i++) {
                msgs[i] = SmsMessage.createFromPdu((byte[]) pdus[i]);
                sender += msgs[i].getOriginatingAddress();
                info += msgs[i].getOriginatingAddress() + "\n";

                data = msgs[i].getUserData();

                for (int index = 0; index < data.length; ++index) {
                    info += Character.toString((char) data[index]);
                    msg += Character.toString((char) data[index]);
                }
            }

            Log.e("message", "receiver " + msg);
            Log.e("sender", "from " + info);
            vAct.msgReceived(msg);  //activity method
        }
    }
}

取消注册接收者

 @Override
protected void onPause() {
    super.onPause();
    unregisterReceiver(smsReceiver);
}

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