Tag: android

[code language=”java”]
{
final InputFilter filter = new InputFilter() {
@Override
public CharSequence filter(CharSequence source,
int start, int end, Spanned dest, int dstart,
int dend)
{
for (int i = start; i < end; i++)
{
if (Character.isDigit(source.charAt(i))||Character.isLetter(source.charAt(i)))
{
return "";
}
}
return null;
}
};
answerTXT.setFilters(new InputFilter[]{filter});
[/code]

ActivityThread casts Application.getBaseContext() to ContextImpl

[code language=”java”]
static ContextImpl getImpl(Context context) {
Context nextContext;
while ((context instanceof ContextWrapper) &&
(nextContext=((ContextWrapper)context).getBaseContext()) != null) {
context = nextContext;
}
return (ContextImpl)context;
}
[/code]

Potential crash when !(context instanceof Activity)

[code language=”java”]
public static Activity unwrap(Context context) {
while (!(context instanceof Activity)) {
ContextWrapper wrapper = (ContextWrapper) context;
context = wrapper.getBaseContext();
}
return context;
}
[/code]

Android L

• Dalvik is replaced with ART
• Material design (click, click)
• Battery Saver
• Notification
• Keyboard
• etc

Android Wear (click, click)

Android Auto

Android TV/Google Cast

Images is load from URL using AsyncTask and Picasso.

Images are in ListView

My code on GitHub

Displaying bitmaps in your UI in ViewPager and GridView (zip)

Image swipe (slide) gallery (zip)

Image slider with swipe and pinch zoom (zip)

Swipe views with Tabs (zip)

ViewPager for screen slides (zip)

ImageView in ListView