How to change position of Toast in Android?

2019-01-01 00:09发布

When I use Toast to display some popup text on the screen, it displays the text a little bit above the bottom of the screen, which is the default position.

Now I want to display it in the middle of screen or somewhere according to my choice.

Can anyone guide me how to achieve this?

标签: android toast
8条回答
萌妹纸的霸气范
2楼-- · 2019-01-01 00:51

You can customize the location of your Toast by using:

setGravity(int gravity, int xOffset, int yOffset)

docs

This allows you to be very specific about where you want the location of your Toast to be.

One of the most useful things about the xOffset and yOffset parameters is that you can use them to place the Toast relative to a certain View.

For example, if you want to make a custom Toast that appears on top of a Button, you could create a function like this:

// v is the Button view that you want the Toast to appear above 
// and messageId is the id of your string resource for the message

private void displayToastAboveButton(View v, int messageId)
{
    int xOffset = 0;
    int yOffset = 0;
    Rect gvr = new Rect();

    View parent = (View) v.getParent(); 
    int parentHeight = parent.getHeight();

    if (v.getGlobalVisibleRect(gvr)) 
    {       
        View root = v.getRootView();

        int halfWidth = root.getRight() / 2;
        int halfHeight = root.getBottom() / 2;

        int parentCenterX = ((gvr.right - gvr.left) / 2) + gvr.left;

        int parentCenterY = ((gvr.bottom - gvr.top) / 2) + gvr.top;

        if (parentCenterY <= halfHeight) 
        {
            yOffset = -(halfHeight - parentCenterY) - parentHeight;
        }
        else 
        {
            yOffset = (parentCenterY - halfHeight) - parentHeight;
        }

        if (parentCenterX < halfWidth) 
        {         
            xOffset = -(halfWidth - parentCenterX);     
        }   

        if (parentCenterX >= halfWidth) 
        {
            xOffset = parentCenterX - halfWidth;
        }  
    }

    Toast toast = Toast.makeText(getActivity(), messageId, Toast.LENGTH_SHORT);
    toast.setGravity(Gravity.CENTER, xOffset, yOffset);
    toast.show();       
}
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浅入江南
3楼-- · 2019-01-01 00:51
 Toast toast = Toast.makeText(test.this,"bbb", Toast.LENGTH_LONG);
 toast.setGravity(Gravity.CENTER, 0, 0);
 toast.show();
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