String mDisplayContent = "aaaaaaaaa";
TextPaint textPaint = new TextPaint();
textPaint.setTextSize(getResources().getDimension(R.dimen.font_size8));
DisplayMetrics dm = getResources().getDisplayMetrics();
int viewWidth = dm.widthPixels - contentTv.getPaddingLeft() - contentTv.getPaddingRight();
//用DynamicLayout,在TextView未绘制的情况下,计算textView行数
DynamicLayout textLayout = new DynamicLayout(mDisplayContent,
textPaint, viewWidth, Layout.Alignment.ALIGN_NORMAL, 1.0f, 0.0f, true);
if (textLayout.getLineCount() > 1) {
contentTv.setGravity(Gravity.CENTER_VERTICAL);
}
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