问题描述
限时送ChatGPT账号..我需要获取文本视图的文本大小,以便在用户按下按钮时增加文本大小,这表明它有助于增加文本视图中的文本大小.让我清楚我到目前为止所做的
I need to get the text size of the text view so that I would increment in text size while user pressing the button which indicates that it helps in increasing the text size in the text view. Let me clear what I have done so far
我有一个文本视图并通过 dimen 文件夹设置其文本大小
i have a text view and setting its text size through dimen folder
<TextView
android:id="@+id/tv_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="2dp"
android:text="@string/flash"
android:textSize="@dimen/tv_text_fontsize"
android:gravity="fill_horizontal"
/>
为了相应地支持我的文本视图文本大小到所有屏幕大小,我制作了不同的维度文件夹并按如下方式设置文本大小
to support my text view text size to all screen sizes accordingly I have made diferent dimen folder and setting the text size as follows
所以对于平板电脑等大型设备是 32sp.
So it is 32sp for large devices such as tablets.
但是当我通过 java 获取文本视图的大小时,它返回错误的文本大小.在这里见波纹管我得到了文本大小
But When I get the size of text view through java it returns me wrong text size. here see bellow Ho I am getting the text size
float textSize = tvContentString.getTextSize();
但这让我返回了错误的 textview 文本大小.
but this is returning me wrong text size of the textview .
请给我建议,我怎样才能获得文本视图中显示的确切文本大小.因为我想在按下按钮时增加文本大小,所以为此我需要检索文本的实际大小,即如果文本大小为 32,我想将其增加 32+1 = 3sp
Please suggest me , how can I get the exact text size being displayed in the text view. As because I want to increment in text size on button press so for this I need to retrieve the actual size of text i.e if the text size is 32 I want to increment it 32+1 = 3sp
但是当我检索文本大小时,它是其他一些东西,例如对于平板电脑,我已将其设置为 32sp,但它正在检索我 42,因此在 42+1 中进行增量使其为 43,当我将其设置为按钮时,按下它的外观尴尬的.
But when I retrieve the text size it is some thing else such as for tablets I have set it 32sp but it is retrieving me 42 so making increment in 42+1 making its 43 and when I set it on button press its look awkward.
请帮忙!!!我怎样才能得到真正的文字大小.??
Please help !!! How can I get real text size. ??
推荐答案
问题在于 getTextSize()
返回以像素为单位的大小,而不是以 sp 为单位的.所以你可以先将像素转换为 sp 然后 -
The problem is that getTextSize()
return the size in pixels, not in sp. So you can convert pixels to sp first then -
tvContentString.setTextSize(TypedValue.COMPLEX_UNIT_SP, new_size);
要将像素转换为 sp 使用此 -
To convert from pixels to sp use this -
public static float pixelsToSp(Context context, float px) {
float scaledDensity = context.getResources().getDisplayMetrics().scaledDensity;
return px/scaledDensity;
}
代码取自此处.
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