Question

My question is very simple and I know the function can be preformed. I want to start activity via text message like “WHERE IS MY DROID” how can this be done? Please provide any information. I think SMSReceiver BroadcastReceiver is in the correct direction but I am not sure.

Answer 1

You need to register an Broadcast Receiver in AndroidManifest.xml for Receiving SMS_RECIVERD Broadcast as:

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

Add permission in AndroidManifest:

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

in your Broadcast Receiver code start your Application as:

public class SMSReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED")){      
   //context.startService(new Intent(context, YourService.class));

   //Start activity as:
    Intent intent24 = new Intent(Intent.ACTION_MAIN).addCategory(
    Intent.CATEGORY_LAUNCHER).setClassName("YOUR_PACKAGE_NAME",
    "com.YOUR_PACKAGE_NAME..YOURACTIVITY_NAME").addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
    .addFlags(Intent.FLAG_FROM_BACKGROUND).setComponent(new ComponentName("YOUR_PACKAGE_NAME",
    "com.YOUR_PACKAGE_NAME..YOURACTIVITY_NAME"));
    context.startActivity(intent24);
   }
 }
}

NOTE : For starting your Activity from background you need to set Intent.FLAG_ACTIVITY_NEW_TASK and Intent.FLAG_FROM_BACKGROUND flags in intent for starting activity from background.