Auto Scale Text Size

I'm looking for a way to when I change a screen size it will proportionally resize the text. Currently I tried Auto Scale TextView Text to Fit within Bounds but it doesn't seems t

Solution 1:

You don't need to call AutoResizeTextView test, you can say TextView since the class extends TextView. I don't see why you'd need to call resizeText() either.

Either way, here's a custom class I like to use to auto re-size text.

publicclassAutoFitTextViewextendsTextView {

publicAutoFitTextView(Context context) {
    super(context);
    init();
}

publicAutoFitTextView(Context context, AttributeSet attrs) {
    super(context, attrs);
    init();
}

privatevoidinit() {

    maxTextSize = this.getTextSize();
    if (maxTextSize < 35) {
        maxTextSize = 30;
    }
    minTextSize = 20;
}

privatevoidrefitText(String text, int textWidth) {
    if (textWidth > 0) {
        intavailableWidth= textWidth - this.getPaddingLeft()
                - this.getPaddingRight();
        floattrySize= maxTextSize;

        this.setTextSize(TypedValue.COMPLEX_UNIT_PX, trySize);
        while ((trySize > minTextSize)
                && (this.getPaint().measureText(text) > availableWidth)) {
            trySize -= 1;
            if (trySize <= minTextSize) {
                trySize = minTextSize;
                break;
            }
            this.setTextSize(TypedValue.COMPLEX_UNIT_PX, trySize);
        }
        this.setTextSize(TypedValue.COMPLEX_UNIT_PX, trySize);
    }
}

@OverrideprotectedvoidonTextChanged(final CharSequence text, finalint start,
        finalint before, finalint after) {
    refitText(text.toString(), this.getWidth());
}

@OverrideprotectedvoidonSizeChanged(int w, int h, int oldw, int oldh) {
    if (w != oldw) {
        refitText(this.getText().toString(), w);
    }
}

@OverrideprotectedvoidonMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    intparentWidth= MeasureSpec.getSize(widthMeasureSpec);
    refitText(this.getText().toString(), parentWidth);
}

publicfloatgetMinTextSize() {
    return minTextSize;
}

publicvoidsetMinTextSize(int minTextSize) {
    this.minTextSize = minTextSize;
}

publicfloatgetMaxTextSize() {
    return maxTextSize;
}

publicvoidsetMaxTextSize(int minTextSize) {
    this.maxTextSize = minTextSize;
}

privatefloat minTextSize;
privatefloat maxTextSize;

}

Solution 2:

Good news! Google introduced Autosizing TextView support in Android O. It will be also included in support librararies.

https://developer.android.com/preview/features/autosizing-textview.html

Solution 3:

I use this, proportionally at the width of the screen.

DisplayMetricsdisplaymetrics=newDisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
        width_screen=displaymetrics.widthPixels;
Mytext.setTextSize(TypedValue.COMPLEX_UNIT_PX, (width_screen/CONST));

the CONST is a number I use for to scale the font, in the dimension I want. It works for my needs.