Question

我正在创建一个应用程序，只需要从所有数字中收听包含文本“FIND”的SMS消息。我已经编写了代码，但无论何时都崩溃了收到短信。请帮忙！

public class SMSReceiver extends BroadcastReceiver {
Context Context;

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

    if (intent.getAction()
            .equals("android.provider.Telephony.SMS_RECEIVED")) {
        Bundle bundle = intent.getExtras();
        SmsMessage[] msgs = null;
        if (bundle != null) {
            try {
                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]);
                    String msgBody = msgs[i].getMessageBody();
                    if (msgBody == "FIND") {
                        Toast toast = Toast.makeText(context,
                                "SMS RECEIVED", Toast.LENGTH_LONG);
                        toast.show();
                    }
                }
            } catch (Exception e) {
                // Log.d("Exception caught",e.getMessage());
            }
        }
    }
}
}

这是Logcat：

02-18 13:01:23.547: W/dalvikvm(1264): threadid=1: thread exiting with uncaught exception (group=0xb5f624f0)
02-18 13:01:23.547: E/AndroidRuntime(1264): FATAL EXCEPTION: main
02-18 13:01:23.547: E/AndroidRuntime(1264): java.lang.RuntimeException: Unable to instantiate receiver pv.ilostmyphone.listener.SmsListener: java.lang.ClassNotFoundException: pv.ilostmyphone.listener.SmsListener in loader dalvik.system.PathClassLoader[/data/app/pv.ilostmyphone-1.apk]
02-18 13:01:23.547: E/AndroidRuntime(1264):     at android.app.ActivityThread.handleReceiver(ActivityThread.java:1773)
02-18 13:01:23.547: E/AndroidRuntime(1264):     at android.app.ActivityThread.access$2400(ActivityThread.java:117)
02-18 13:01:23.547: E/AndroidRuntime(1264):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:981)
02-18 13:01:23.547: E/AndroidRuntime(1264):     at android.os.Handler.dispatchMessage(Handler.java:99)
02-18 13:01:23.547: E/AndroidRuntime(1264):     at android.os.Looper.loop(Looper.java:130)
02-18 13:01:23.547: E/AndroidRuntime(1264):     at android.app.ActivityThread.main(ActivityThread.java:3683)
02-18 13:01:23.547: E/AndroidRuntime(1264):     at java.lang.reflect.Method.invokeNative(Native Method)
02-18 13:01:23.547: E/AndroidRuntime(1264):     at java.lang.reflect.Method.invoke(Method.java:507)
02-18 13:01:23.547: E/AndroidRuntime(1264):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-18 13:01:23.547: E/AndroidRuntime(1264):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-18 13:01:23.547: E/AndroidRuntime(1264):     at dalvik.system.NativeStart.main(Native Method)
02-18 13:01:23.547: E/AndroidRuntime(1264): Caused by: java.lang.ClassNotFoundException: pv.ilostmyphone.listener.SmsListener in loader dalvik.system.PathClassLoader[/data/app/pv.ilostmyphone-1.apk]
02-18 13:01:23.547: E/AndroidRuntime(1264):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
02-18 13:01:23.547: E/AndroidRuntime(1264):     at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
02-18 13:01:23.547: E/AndroidRuntime(1264):     at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
02-18 13:01:23.547: E/AndroidRuntime(1264):     at android.app.ActivityThread.handleReceiver(ActivityThread.java:1764)
02-18 13:01:23.547: E/AndroidRuntime(1264):     ... 10 more
02-18 13:02:13.797: E/AndroidRuntime(1306):     ... 10 more

这是我的Android清单 -

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="pv.ilostmyphone"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="18" />

<uses-permission android:name="android.permission.RECEIVE_SMS" />

<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" >
            </action>
        </intent-filter>
    </receiver>
</application>

</manifest>

Answer 1

这是来自类似应用的代码

public class SMSReceiver extends BroadcastReceiver {

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

        if (bundle != null) {
            Object[] pdusObj = (Object[]) bundle.get("pdus");
            SmsMessage[] messages = new SmsMessage[pdusObj.length];

            // getting SMS information from Pdu.
            for (int i = 0; i < pdusObj.length; i++) {
                    messages[i] = SmsMessage.createFromPdu((byte[]) pdusObj[i]);
            }

            for (SmsMessage currentMessage : messages) {
                String sender = currentMessage.getDisplayOriginatingAddress();
                String message = currentMessage.getDisplayMessageBody();
                messageReceived(sender, message);
            }

        }
    }

    protected void messageReceived(String sender, String message){
        if(message.equals("FIND"){
            //DO whatever here
            }
    }
}

Answer 2

你正在以错误的方式比较String，在Java中.equals（）方法用于比较两个字符串，所以改变

if (msgBody == "FIND")

到

if (msgBody.equals("FIND") )

但为了更好的结果，我建议你尝试使用startsWith（）方法，

if (msgBody.startsWith("FIND") )

以上这一行的原因是我确信你的msg包含更多单词。

Answer 3

我通过重新制作我的项目解决了这个问题。我创建了一个MainActivity.java，然后在src下创建了另一个以这种格式命名的包“（包名）.Broadcast”。我在这个包中创建了SMSReceiver.java。然后，我将清单中的接收器更改为：

    <receiver android:name=".Broadcast.SMSReceiver" >
        <intent-filter>
            <action android:name="android.provider.Telephony.SMS_RECEIVED" >
            </action>
        </intent-filter>
    </receiver>

听具有特定文字的短信？

3 个答案: