android:gravity
sets the gravity of the content of the View it used on
android:layout_gravity
sets the gravity of the View or Layout in its parent
ISO 639 : standardized nomenclature used to classify all known languages
chinese: zh
support other languages: make a folder named values-zh under res/ make a strings.xml and set in all variables with suppoting languages
Toast
- a Toast provides simple feedback about operation...
Toast.makeText(context, text, duration).show();
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marging
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border
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padding
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| content |
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