Beppe Beppe - 5 months ago 7
Android Question

How to create exactly square buttons that fill in width of screen

I've an activity that fill with some buttons dynamically base on TableLayout and TableRow like this:

private TableLayout buttonTableLayout;
//-----
for (int row = 0; row < buttonTableLayout.getChildCount(); ++row)
((TableRow) buttonTableLayout.getChildAt(row)).removeAllViews();

LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);

for (int row = 0; row < 5; row++) {
TableRow currentTableRow = getTableRow(row);

for (int column = 0; column < 5; column++) {
Button newGuessButton = (Button) inflater.inflate(R.layout.my_button, currentTableRow, false);
newGuessButton.setText(String.valueOf((row * 5) + column + 1));
currentTableRow.addView(newGuessButton);
}

}
}
//----
private TableRow getTableRow(int row) {
return (TableRow) buttonTableLayout.getChildAt(row);
}


I want to make a 5*5 list of buttons that 1:All of them has the same width and height and 2: make them fill of screen.
In my code I have a layout that named my_button, like :

<Button xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/newButton"
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@drawable/button_style"></Button>


or

<Button xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/newButton"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="@drawable/button_style"></Button>


and results is:
enter image description here
enter image description here

I have change the gravity but it doesn't works.Is there any way to make them exactly square and fill the width of screen.

Answer

You should sub-class Button view and override below function:

public class SquareButton extends Button {
public SquareButton(Context context) {
    super(context);
}

public SquareButton(Context context, AttributeSet attrs) {
    super(context, attrs);
}

public SquareButton(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
}

public SquareButton(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
    super(context, attrs, defStyleAttr, defStyleRes);
}

@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, widthMeasureSpec);
    int width = MeasureSpec.getSize(widthMeasureSpec);
    int height = MeasureSpec.getSize(heightMeasureSpec);
    int size = width > height ? height : width;
    setMeasuredDimension(size, size); // make it square

}
}

Edit: Ok, you need to customize your button as above. Then, instead of using the default button, you can use the above SquareButton.

 <com.kingfisher.utils.SquareButton
            android:id="@+id/btnSearch"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="100"
            android:text="Downloaded"/>