重写TextView解决HorizontalScrollView中TextView显示不全的问题

/**

* 适用于宽度相对确定的情况
* Created by xieyuhai on 2017/9/13.
*/

public class MyTextView extends AppCompatTextView {

private static final String TAG = "MyTextView";

public MyTextView(Context context) {
this(context, null);
}

public MyTextView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
}

@Override
protected void onFinishInflate() {
super.onFinishInflate();

Log.e(TAG, "onFinishInflate: w:" + getWidth() + "; height:" + getHeight());
}

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);

float textWidth = getPaint().measureText(getText().toString());

BigDecimal v1 = new BigDecimal(Double.toString(textWidth));
BigDecimal v2 = new BigDecimal(Double.toString(w));

//一行的高度*总行数+上下内边距= 控件的高度             避免死循环，保留两位小数，考虑到精度可能会丢失，在后面加1
BigDecimal lineCount = v1.divide(v2, 2, BigDecimal.ROUND_HALF_EVEN).add(new BigDecimal(1));

Paint.FontMetrics fm = getPaint().getFontMetrics();
double v = Math.ceil(fm.descent - fm.ascent);//

//一行的高度*总行数+上下内边距= 控件的高度