Center text in a toast in Android

问题

I was wondering if there was a way to display all text in a toast to be centered. For instance, I have a toast that has 2 lines of text in it. For purely aesthetic reasons, I would like the text to center-aligned instead of left-aligned. I've looked through the documentation and can't find anything about it. Is there a simple way to do this that I have missed?

Thanks Chris

回答1:

Use the Toast's setView(view) function to supply a View with Gravity.CENTER.

回答2:

Adapted from another answer:

Toast toast = Toast.makeText(this, "Centered\nmessage", Toast.LENGTH_SHORT);
TextView v = (TextView) toast.getView().findViewById(android.R.id.message);
if( v != null) v.setGravity(Gravity.CENTER);
toast.show();

回答3:

Toast is built on a TextView and the default gravity of it is left aligned. So, you need to create your own TextView like this for instance :

<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:gravity="center_vertical|center_horizontal"
    android:text="all the text you want"
/>

And you assign the TextView to the Toast like this :

Toast t = new Toast(yourContext);
t.setView(yourNewTextView);

回答4:

It is dirty hack, but

((TextView)((LinearLayout)toast.getView()).getChildAt(0))
    .setGravity(Gravity.CENTER_HORIZONTAL);

回答5:

Without the hacks:

String text = "Some text";
Spannable centeredText = new SpannableString(text);
centeredText.setSpan(new AlignmentSpan.Standard(Layout.Alignment.ALIGN_CENTER),
            0, text.length() - 1,
            Spannable.SPAN_INCLUSIVE_INCLUSIVE);

Toast.makeText(getActivity(), centeredText, Toast.LENGTH_LONG).show();

There are also another alignments besides center.

source

回答6:

Toast toast = Toast.makeText(this, "Message", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();

回答7:

Not saing that findViewById(android.R.id.message) is wrong, but just in case there are (future?) implementation differences I myself used a bit differen approach:

void centerText(View view) {
    if( view instanceof TextView){
        ((TextView) view).setGravity(Gravity.CENTER);
    }else if( view instanceof ViewGroup){
        ViewGroup group = (ViewGroup) view;
        int n = group.getChildCount();
        for( int i = 0; i<n; i++ ){
            centerText(group.getChildAt(i));
        }
    }
}

and then:

Toast t = Toast.makeText(context, msg,Toast.LENGTH_SHORT);
centerText(t.getView());
t.show();

回答8:

It is work for me:

Toast toast = Toast.makeText(context, message, Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER| Gravity.BOTTOM, 0, 20);
toast.show();

回答9:

In kotlin:

fun makeToast(context: Context, resId: Int) {
    val toast = Toast.makeText(context, resId, Toast.LENGTH_SHORT)
    val view = toast.view.findViewById<TextView>(android.R.id.message)
    view?.let {
        view.gravity = Gravity.CENTER
    }
    toast.show()
}

回答10:

This variation is with using LinearLayout. :)

Toast SampleToast = Toast.makeText(this, "This is the example of centered text.\nIt is multiline text.", Toast.LENGTH_SHORT);
LinearLayout OurLayout = (LinearLayout) SampleToast.getView();

if (OurLayout.getChildCount() > 0) 
{
TextView SampleView = (TextView) OurLayout.getChildAt(0);
SampleView.setGravity(Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL);
}

SampleToast.show();

回答11:

Toast t=Toast.makeText(getApplicationContext(),"Text",Toast.LENGTH_LONG);
t.setText("Password Does't match...");
t.setGravity(0, 0, 0);
t.show();

simple code for toast most be center

来源：https://stackoverflow.com/questions/3522023/center-text-in-a-toast-in-android

标签

android

text

alignment

center

toast