Android 折叠工具栏布局字体不以编程方式更改

在出现意外错误后，设置自定义字体会出现问题。为什么在我将字体添加到正确位置时会出现此错误

font/my_font.otf

尝试对空对象引用调用虚拟方法“boolean android.content.Context.isRestricted（）”

---

如果您将字体放在assets/font/my\u font.otf:

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        //This should solve your crashing problem
        val typeface = Typeface.createFromAsset(assets, "font/my_font.otf")
        collapsingToolbarLayout.title = getString(R.string.main_activity)
        collapsingToolbarLayout.setCollapsedTitleTypeface(mTypeface)
        collapsingToolbarLayout.setExpandedTitleTypeface(mTypeface)
    }
}

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        //This should solve your crashing problem
        val typeface = ResourcesCompat.getFont(this, R.font.my_font)
        collapsingToolbarLayout.title = getString(R.string.main_activity)
        collapsingToolbarLayout.setCollapsedTitleTypeface(mTypeface)
        collapsingToolbarLayout.setExpandedTitleTypeface(mTypeface)
    }
}

---

如果将字体置于res/font/my\u font.otf（推荐）：

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        //This should solve your crashing problem
        val typeface = Typeface.createFromAsset(assets, "font/my_font.otf")
        collapsingToolbarLayout.title = getString(R.string.main_activity)
        collapsingToolbarLayout.setCollapsedTitleTypeface(mTypeface)
        collapsingToolbarLayout.setExpandedTitleTypeface(mTypeface)
    }
}

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        //This should solve your crashing problem
        val typeface = ResourcesCompat.getFont(this, R.font.my_font)
        collapsingToolbarLayout.title = getString(R.string.main_activity)
        collapsingToolbarLayout.setCollapsedTitleTypeface(mTypeface)
        collapsingToolbarLayout.setExpandedTitleTypeface(mTypeface)
    }
}

---

@MacaronLover您是否从类中删除了

private val mTypeface=Typeface.createFromAsset（assets，“my_font.otf”）

？我用您的代码替换了我的代码，但出现此错误

font-asset-not-found-font/my_font.otf

。这是否应该放在

assets

文件夹中？@MacaronLover我更新了我的答案，您的问题来自错误的字体位置引用。