如何在运行时更改 TextView 的样式 [英] How to change a TextView's style at runtime

问题描述

我有一个 android 应用，当用户点击 TextView 时，我想应用一个定义的样式.

I have an android app on which, when the user taps a TextView, I would like to apply a defined style.

我想找到一个 textview.setStyle() 但它不存在.我试过

I thought to find a textview.setStyle() but it doesn't exists. I tried

textview.setTextAppearance();

但它不起作用.

推荐答案

我通过创建一个新的 XML 文件 res/values/style.xml 来做到这一点，如下所示:

I did this by creating a new XML file res/values/style.xml as follows:

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <style name="boldText">
        <item name="android:textStyle">bold|italic</item>
        <item name="android:textColor">#FFFFFF</item>
    </style>

    <style name="normalText">
        <item name="android:textStyle">normal</item>
        <item name="android:textColor">#C0C0C0</item>
    </style>

</resources>

我的strings.xml"文件中也有这样的条目:

I also have an entries in my "strings.xml" file like this:

<color name="highlightedTextViewColor">#000088</color>
<color name="normalTextViewColor">#000044</color>

然后，在我的代码中，我创建了一个 ClickListener 来捕获该 TextView 上的点击事件:从 API 23 开始，不推荐使用setTextAppearance"

Then, in my code I created a ClickListener to trap the tap event on that TextView: As from API 23 'setTextAppearance' is deprecated

    myTextView.setOnClickListener(new View.OnClickListener() {
                public void onClick(View view){
                    //highlight the TextView
                    //myTextView.setTextAppearance(getApplicationContext(), R.style.boldText);
    if (Build.VERSION.SDK_INT < 23) {
       myTextView.setTextAppearance(getApplicationContext(), R.style.boldText);
    } else {
       myTextView.setTextAppearance(R.style.boldText);
    }
     myTextView.setBackgroundResource(R.color.highlightedTextViewColor);
                }
            });

要将其改回来，您可以使用:

To change it back, you would use this:

if (Build.VERSION.SDK_INT < 23) {
    myTextView.setTextAppearance(getApplicationContext(), R.style.normalText);
} else{
   myTextView.setTextAppearance(R.style.normalText);
}
myTextView.setBackgroundResource(R.color.normalTextViewColor);

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