July 19,2016
Today i come to know about the user-interface layouts and there working.From these layouts today, i have cover the working with button, use of toast and custom toast.
Android Button
Android Button represents a push-button. The android.widget.Button is subclass of TextView class and CompoundButton is the subclass of Button class.
There are different types of buttons in android such as RadioButton, ToggleButton, CompoundButton etc.
We have register button like:-
Button button= (Button)findViewById(R.id.button);
Android Toast
Andorid Toast can be used to display information for the short period of time. A toast contains message to be displayed quickly and disappears after sometime.
The android.widget.Toast class is the subclass of java.lang.Object class.
You can also create custom toast as well for example toast displaying image. You can visit next page to see the code for custom toast.
Toast class
Toast class is used to show notification for a particular interval of time. After sometime it disappears. It doesn’t block the user interaction.
Constants of Toast class
There are only 2 constants of Toast class which are given below.
| Constant | Description |
|---|---|
| public static final int LENGTH_LONG | displays view for the long duration of time. |
| public static final int LENGTH_SHORT | displays view for the short duration of time. |
Methods of Toast class
The widely used methods of Toast class are given below.
| Method | Description |
|---|---|
| public static Toast makeText(Context context, CharSequence text, int duration) | makes the toast containing text and duration. |
| public void show() | displays toast. |
| public void setMargin (float horizontalMargin, float verticalMargin) | changes the horizontal and vertical margin difference. |
Android Toast Example
- Toast.makeText(getApplicationContext(),“Hello Javatpoint”,Toast.LENGTH_SHORT).show();
Another code:
- Toast toast=Toast.makeText(getApplicationContext(),“Hello Javatpoint”,Toast.LENGTH_SHORT);
- toast.setMargin(50,50);
- toast.show();
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