[ReservedMain.java] It is the MainActivity.java package victor8481.tystory.com; import android.app.Activity; import android.content.Context; import android.media.AudioManager; import android.os.Bundle; import android.util.Log; public class ReservedMain extends Activity { public static final String TAG = "CallStateListner"; public int mRingModeBackup = 0; public boolean mIsReservedMainActivity = ..