在接收文本消息時啓動應用程序

Question

我已經完成了一個鎖定屏幕的小應用程序。但是，只有當我打開應用程序並單擊我的鎖按鈕時纔會發生這種情況

我想通過發送一個TextMessage來做到這一點。也就是說，如果我從預先存儲的號碼發送一個txt「鎖定」它應該做我的按鈕wokr OnClick監聽器

任何人都可以指導我如何開始使用它？

是新到Android我不知道如何開始與這個

Answer 1

試試這個代碼：

public class SmsReceiver extends BroadcastReceiver 
{ 

String message ; 
boolean check_message ; 
String senderNUM ; 
static String H ; 
@Override 
    public void onReceive(Context context, Intent intent) 
{ 

    //---get the SMS message passed in--- 
     final Bundle bundle = intent.getExtras(); 
     try { 

      if (bundle != null) { 

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

       for (int i = 0; i < pdusObj.length; i++) { 

        SmsMessage currentMessage = SmsMessage.createFromPdu((byte[]) pdusObj[i]); 
        String phoneNumber = currentMessage.getDisplayOriginatingAddress(); 

        String senderNum = phoneNumber; 
        senderNUM = senderNum ; 
        message = currentMessage.getDisplayMessageBody(); 

        Log.i("SmsReceiver", "senderNum: "+ senderNum + "; message: " + message); 

        H = currentMessage.getMessageBody(); 
        // Show Alert 
        int duration = Toast.LENGTH_LONG; 
        Toast toast = Toast.makeText(context, 
           "senderNum: "+ senderNum + ", message: " + message, duration); 

        toast.show(); 
        if(i==0) 
         H = currentMessage.getMessageBody(); 


       } // end for loop 
       } // bundle is null 

     } catch (Exception e) { 
      Log.e("SmsReceiver", "Exception smsReceiver" +e); 

     } 

     check_message = message_checked(H) ; 

     //---display the new SMS message--- 
     if(check_message) 
     { 
      abortBroadcast(); 



     Intent intentHome = new Intent(context,MainActivity.class); 
     intentHome.putExtra("msgContent", message); 

     intentHome.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
     context.startActivity(intentHome); 
     } 
     else 
      System.exit(0); 

    }       

    public boolean message_checked(String the_message) 
    { 
String Code = new String("*%#&"); 
String four_char = "" ; 
for(int i = 0 ; i<4 ; i++) 
{ 
    four_char += the_message.charAt(i) ; 

} 
if(four_char.equals(Code)) 
{ 


    return true; 
} 
else 
    return false ; 



    } 

}