-
在activity生命周期方法:onCreate(),onStart(),onResume()中调用View.getWidth()和View.getHeight()方法获取View的高度是不可行的，因为此时布局没有加载是不可见状态。
还有当view的可见状态为：GONE，时获取的宽高也是0；
2. 解决办法：
（1）直接测量：
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private
void
first() {
int
width = View.MeasureSpec.makeMeasureSpec(
0
,
View.MeasureSpec.UNSPECIFIED);
int
height = View.MeasureSpec.makeMeasureSpec(
0
,
View.MeasureSpec.UNSPECIFIED);
textView.measure(width, height);
int
height1 = textView.getMeasuredHeight();
int
width2 = textView.getMeasuredWidth();
System.out.println(
"first: 宽： "
+ width2 +
" 高： "
+ height1);
}
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（2）添加绘制view之前的监听
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private
void
second() {
ViewTreeObserver vto = textView.getViewTreeObserver();
vto.addOnPreDrawListener(
new
ViewTreeObserver.OnPreDrawListener() {
public
boolean
onPreDraw() {
int
height = textView.getMeasuredHeight();
int
width = textView.getMeasuredWidth();
System.out.println(
"second: 宽："
+ width +
" 高： "
+ height);
return
true
;
}
});
}
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（3）添加整体布局监听
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private
void
third() {
ViewTreeObserver vto = textView.getViewTreeObserver();
vto.addOnGlobalLayoutListener(
new
OnGlobalLayoutListener() {
public
void
onGlobalLayout() {
textView.getViewTreeObserver().removeGlobalOnLayoutListener(
this
);
int
height = textView.getMeasuredHeight();
int
width = textView.getMeasuredWidth();
System.out.println(
"third: 宽："
+ width +
" 高： "
+ height);
}
});
}
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本文转自wauoen51CTO博客，原文链接：http://blog.51cto.com/7183397/1606535
，如需转载请自行联系原作者
