When I came back from my last travel my 3G connection stopped working and seems that a lot of people already had the same problem. It was after I reactivated my plan when I came back to the US. Apparently they forgot to activate my data plan I’m paying for.
How to solve
I tried different things but finally I tried to simply activate the phone again using the Activate application (probably the first application on the list). After a few tries It worked and I got my 3G connection back.
Improve your battery life
One interesting thing is that during my days without 3G my battery life was quite better. So when you want to save battery, in travels for example, you can manually activate/deactivate your data plan on the Setting -> Wireless & networks settings -> Mobile Networks -> Data Enabled option.
Context ctx = getContext();
Display display = ((WindowManager)ctx.getSystemService(ctx.WINDOW_SERVICE)).getDefaultDisplay();
int width = display.getWidth();
int height = display.getHeight();
Yes, there are easier ways to retrieve the screen width on Android but there are cases that this long code is the only solution. You may already have the Context. WindowManager or the Display and so it would be smaller, but this code is more general.
Variations: 1. Same behavior in a EditText with default TransformationMethod. 2. DatePicker and TimePicker have strange behaviors too. They lose what I was writing on them but they don’t copy content. 3. The behavior was first noticed on the internal component NumberPicker and after that tested on EditText.
Malicious usage scenario:
Someone is filling user/password form in a application, go to the bathroom and forget the phone over a table. Other one gets it, use the flaw and read the user secret password.
Possible cause:
When locale is changed and you enter again in a application, it has to be destroyed and created but somehow old values are filled again. Probably the routine that cares about writing i18n details such orientation (left-to-right/right-to-left) has a bug.
Affected versions:
Android 1.6, tested on 2 devices and emulator.
Android 2.0, tested on device.
Certainly all versions between them and I guess 2.1 also.
Thanks to Diego Almeida who first noticed that behavior on NumberPicker. :]
Update: I filled a issue on Android project. Seems that they know about that behavior and the workaround is to put android:id properties on elements. The problem persists on NumberPicker even when using android:id on them! In fact, is my real problem.
a new android I just drew. source-code: android_look.svg. CC-BY-SA as usual.
You can acess internal Android resources such strings, drawables, layouts and others. For example, if you need to create a button with the text “Cancel” you can do:
Using this you are using the internal resource for “Cancel” in that Android and all its i18n. Using the same logic you can access drawables, layouts, etc.
How to add a shadow in a text view? How to improve the text readability on widgets?
There’s four properties on TextView related to shadows.
First a a normal TextView XML declaration.
<TextViewandroid:text="I thought what I'd do was, I'd pretend I was one of those deaf-mutes."android:gravity="center_horizontal"android:textColor="#000000"android:layout_width="200px"android:layout_height="fill_parent"></TextView>
<TextView
android:text="I thought what I'd do was, I'd pretend I was one of those deaf-mutes."
android:gravity="center_horizontal"
android:textColor="#000000"
android:layout_width="200px"
android:layout_height="fill_parent">
</TextView>
Now the same TextView with the four shadow properties, the color, the x,y offset and the blur radius.
<TextViewandroid:text="I thought what I'd do was, I'd pretend I was one of those deaf-mutes."android:gravity="center_horizontal"android:textColor="#000000"android:layout_width="200px"android:layout_height="fill_parent"android:shadowColor="#555555"android:shadowDx="5.0"android:shadowDy="5.0"android:shadowRadius="3.0"></TextView>
<TextView
android:text="I thought what I'd do was, I'd pretend I was one of those deaf-mutes."
android:gravity="center_horizontal"
android:textColor="#000000"
android:layout_width="200px"
android:layout_height="fill_parent"
android:shadowColor="#555555"
android:shadowDx="5.0"
android:shadowDy="5.0"
android:shadowRadius="3.0">
</TextView>