作为父级的 CustomTextView 和作为父级的 Textview 之间的区别

Question

我创建了 CustomTextview 如下

public class CustomTextView extends AppCompatTextView {
        public CustomTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
       // im changing font family here .ttf files
    }
}

.

<com.android.app.CustomTextView
android:id="@+id/view”
/>

有什么区别

这个

CustomTextView textView = findViewbyId(R.id.view);

还有这个

TextView textView = findViewbyId(R.id.view);

当我把这个 TextView textView = findViewbyId(R.id.view); IDE 运行时没有抛出错误。为什么？谢谢！

Answer 1

现实生活比较：

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来源(+)

作为父级的 CustomTextView 和作为父级的 Textview 之间的区别

Difference between CustomTextView as Parent and Textview as Parent

java

oop

inheritance

android

android-custom-view