Auto Scale Text Size
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.
public class AutoFitTextView extends TextView {
public AutoFitTextView(Context context) {
super(context);
init();
}
public AutoFitTextView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
maxTextSize = this.getTextSize();
if (maxTextSize < 35) {
maxTextSize = 30;
}
minTextSize = 20;
}
private void refitText(String text, int textWidth) {
if (textWidth > 0) {
int availableWidth = textWidth - this.getPaddingLeft()
- this.getPaddingRight();
float trySize = 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);
}
}
@Override
protected void onTextChanged(final CharSequence text, final int start,
final int before, final int after) {
refitText(text.toString(), this.getWidth());
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
if (w != oldw) {
refitText(this.getText().toString(), w);
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
refitText(this.getText().toString(), parentWidth);
}
public float getMinTextSize() {
return minTextSize;
}
public void setMinTextSize(int minTextSize) {
this.minTextSize = minTextSize;
}
public float getMaxTextSize() {
return maxTextSize;
}
public void setMaxTextSize(int minTextSize) {
this.maxTextSize = minTextSize;
}
private float minTextSize;
private float 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.
DisplayMetrics displaymetrics = new DisplayMetrics();
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.
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I Yeu C
Updated on October 22, 2022Comments
-
I Yeu C less than a minute
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 to be working. but I'm not sure I do it the right way or not. I'm now currently calling by
AutoResizeTextView test = new AutoResizeTextView(this); test=(AutoResizeTextView)findViewById(R.id.test456); test.resizeText(); // I call this to resize.. am I right?
XML
<com.mypackage.AutoResizeTextView android:id="@+id/test456" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1" />