自定义textview两端分散对齐

比眉伴天荒 2023-10-04 10:21 60阅读 0赞

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW9lcmJ1eXUxMjMz_size_16_color_FFFFFF_t_70][]

[https://blog.csdn.net/qq\_35698774/article/details/82344830][https_blog.csdn.net_qq_35698774_article_details_82344830] 侵删

import android.annotation.SuppressLint;
    import android.content.Context;
    import android.content.res.TypedArray;
    import android.graphics.Canvas;
    import android.graphics.Paint;
    import android.graphics.Rect;
    import android.os.Build;
    import android.text.TextUtils;
    import android.util.AttributeSet;
    import android.widget.TextView;
    
    import com.hebky.xtdz.R;
    
    /**
     * Created by wjs on 2018/9/3.
     */
    
    @SuppressLint("AppCompatCustomView")
    public class AlignTextView extends TextView {
    
        private Align mAlign = Align.HORTAL;
        private int canvasLength;
        private double lineSpacing;
    
        public AlignTextView(Context context) {
            super(context);
        }
    
        public AlignTextView(Context context, AttributeSet attrs) {
            super(context, attrs);
            if (!this.isInEditMode())
                initTypedArray(context, attrs, -1, R.style.AlignTextView_Default);
        }
    
        public AlignTextView(Context context, AttributeSet attrs, int defStyle) {
            super(context, attrs, defStyle);
            if (!this.isInEditMode())
                initTypedArray(context, attrs, defStyle, R.style.AlignTextView_Default);
        }
    
        @SuppressLint("NewApi")
        public AlignTextView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
            super(context, attrs, defStyleAttr, defStyleRes);
            if (!this.isInEditMode())
                initTypedArray(context, attrs, defStyleAttr, defStyleRes);
        }
    
        private void initTypedArray(Context context, AttributeSet attrs,
                                    int defStyleAttr, int defStyleRes) {
            TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.AlignTextView, defStyleAttr, defStyleRes);
            int alignStyle = a.getInt(R.styleable.AlignTextView_align, 0);
            a.recycle();
            switch (alignStyle) {
                case 1:
                    mAlign = Align.HORTAL;
                    break;
                case 2:
                    mAlign = Align.VERCAL;
                    break;
                default:
                    mAlign = Align.HORTAL;
                    break;
            }
        }
    
        public enum Align {
            HORTAL,
            VERCAL,
        }
    
        @Override
        protected void onDraw(Canvas canvas) {
            String text = getText().toString();
            Paint paint = new Paint();
            paint.setTextSize(getTextSize());
            paint.setColor(getCurrentTextColor());
            paint.setAntiAlias(true);
            int textLengthHeight = 0;
            Rect r = new Rect();
            int[] Arr = new int[(text.length())];
            float xOffset = 0;
            int yOffset = (int) ((canvas.getHeight() / 2) - ((paint.descent() + paint.ascent()) / 2));
            switch (mAlign) {
    
                case VERCAL:
                    canvasLength = getMeasuredHeight();
                    lineSpacing = 0.0;
                    if (!TextUtils.isEmpty(getText()) && getText().length() > 1) {
    
                        for (int i = 0; i < text.length(); i++) {
                            paint.getTextBounds(text.substring(i, i + 1), 0, 1, r);
                            textLengthHeight = textLengthHeight + (r.bottom - r.top);
                            Arr[i] = r.bottom - r.top;
                            if (i == 0) {
                                Arr[i] = r.bottom - r.top + 12;
                            }
                        }
                        lineSpacing = (double) (canvasLength - textLengthHeight - 16) / (text.length() - 1);
                    }
    
                    float arrlength = 0;
                    for (int i = 0; i < text.length(); i++) {
                        arrlength = arrlength + Arr[i];
                        canvas.drawText(text.substring(i, i + 1), xOffset, (float) (i * lineSpacing + arrlength), paint);
                    }
    
                    break;
                case HORTAL:
                default:
                    canvasLength = getMeasuredWidth();
                    float textLength = paint.measureText(text);
                    lineSpacing = 0;
                    if (!TextUtils.isEmpty(getText()) && getText().length() > 1) {
                        lineSpacing = (canvasLength - textLength) / (text.length() - 1) / paint.getTextSize();
                    }
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                        canvas.translate((float) (-lineSpacing * getTextSize() / 2), 0);
                        paint.setLetterSpacing((float) lineSpacing);
                        canvas.drawText(text, xOffset, yOffset, paint);
                    } else {
                        float spacePercentage = (float) lineSpacing;
                        for (int i = 0; i < text.length(); i++) {
                            if (canvas != null) {
                                String s = String.valueOf(text.charAt(i));
                                canvas.drawText(s, xOffset, yOffset, paint);
                                canvas.translate(paint.measureText(s), 0);
                                canvas.translate(getTextSize() * spacePercentage, 0);
                            }
                        }
                    }
                    break;
            }
    
    
        }
    
    }

<declare-styleable name="AlignTextView">
            <attr name="align">
                <enum name="hortal" value="1" />
                <enum name="vercal" value="2" />
            </attr>
        </declare-styleable>

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW9lcmJ1eXUxMjMz_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20210410101515687.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW9lcmJ1eXUxMjMz,size_16,color_FFFFFF,t_70
[https_blog.csdn.net_qq_35698774_article_details_82344830]: https://blog.csdn.net/qq_35698774/article/details/82344830