Android-更改字体（LED液晶数字字体）

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public class DigitalTextView extends androidx.appcompat.widget.AppCompatTextView {
    public DigitalTextView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }
    private void init(Context context){
        String file = "digital.ttf";
        AssetManager assets = context.getAssets();
        Typeface font = Typeface.createFromAsset(assets, file);
        setTypeface(font);
    }
}

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   <com.xx.xxxxx.view.DigitalTextView
       android:id="@+id/digital"
       android:layout_marginTop="6dp"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:textColor="#ffffffff"
       android:textSize="24sp"
       />

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private DigitalTextView digital;
digital= (DigitalTextView) findViewById(R.id.digital);