android 代码里设置控件属性

设置字体大小:

setTextSize(TypedValue.COMPLEX_UNIT_PX,22); //22像素 
setTextSize(TypedValue.COMPLEX_UNIT_SP,22); //22SP 
setTextSize(TypedValue.COMPLEX_UNIT_DIP,22);//22DIP

设置layout_weight:

setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT, 1.0f));

最后的1.0f即是，需要是浮点型的才行

LayoutParams中使用dip作为单位：

final int iv_width = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 22, getResources().getDisplayMetrics());
final int iv_height = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 22, getResources().getDisplayMetrics());
ImageView iv = new ImageView(this);
iv.setLayoutParams(new LinearLayout.LayoutParams(iv_width, iv_height));
iv.setImageResource(R.drawable.check);
iv.setTag(phone_number);
line_pn.addView(iv);

判断ImageView是否是visible的：

if (myImageView.getVisibility() == View.VISIBLE) {
    // Its visible
} else {
    // Either gone or invisible
}