Toggle Button and Alert Dialog

Actually I tried them before and now I dont need them in my project. But write down them just for reference.

Both of them are ways to switch among given states; toggle button has 2 states, "on" and "off", while Alert Dialog could support unlimited ones, technically. I tried them for yes/no switch because I want to let user choose whether they want only GPS (fine location tracker) or currently best one to track the location in my project.

Toggle Button is really just switching the text on the button actually. At the same time, you could extract its text at other places, like another button. User could switch to "only GPS" or "all providers" before they hit the tracking button. In the tracking button, I will first extract the text of the toggle button, and then put different info in intent to start the tracking service.

To detect which state user chooses, I create two strings in the string.xml to hold the text for two states, and then compare the current text with them. Nothing fancy here; easy to go.

Alert Dialog is another class to let user choose options. When enabled, the app will pop up a window containing options. In current version of Android, we could use AlertDialog.Builder class to build the alert dialog with the title, content, on click methods we need, and then create it.

The doPositiveClick and doNegativeClick are two methods corresponding to two choices. What they do in my version is just passing different int to the service class in the intent; the service will initiate different location listener based on the int.