背景

原生textview換行會出現(xiàn)換行踢俄，右側(cè)文字參差不齊缩功，最近公司產(chǎn)品經(jīng)理看不下去了，要求盡可能要對齊都办，保持美觀嫡锌。通過我花了一些時間來研究， 發(fā)現(xiàn)大部分原因是因為句子中含有中英文標(biāo)點符號脆丁，可以通過替換中文標(biāo)點符號解決世舰，文字半角轉(zhuǎn)換為全角，對于一些頑固的情況槽卫， 通過繪制寬度來解決跟压，最終達(dá)成自己要想的效果。

效果

原生換行：

yuansheng.png

自定義textview換行：

zidingyi.png

替換中文符號：

public String stringFilter(String str) {
        str = str.replaceAll("【", "[").replaceAll("】", "]").replaceAll("歼培！", "!").replaceAll("：", ":");// 替換中文標(biāo)號
        String regEx = "[『』]"; // 清除掉特殊字符
        Pattern p = Pattern.compile(regEx);
        Matcher m = p.matcher(str);
        return m.replaceAll("").trim();
    }

半角轉(zhuǎn)換為全角：

public String ToDBC(String input) {
        char[] c = input.toCharArray();
        for (int i = 0; i < c.length; i++) {
            if (c[i] == 12288) {// 全角空格為12288震蒋，半角空格為32
                c[i] = (char) 32;
                continue;
            }
            if (c[i] > 65280 && c[i] < 65375)// 其他字符半角(33-126)與全角(65281-65374)的對應(yīng)關(guān)系是：均相差65248
                c[i] = (char) (c[i] - 65248);
        }
        return new String(c);
    }

測試代碼

1.布局文件:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.lenovo.mytest1708.SecondActivity">

    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:maxWidth="200dp"
        android:text="原生textview"
        android:visibility="gone"
        android:layout_centerInParent="true"
        android:layout_height="wrap_content"/>

    <LinearLayout
        android:layout_width="wrap_content"
        android:orientation="vertical"
        android:visibility="visible"
        android:layout_centerInParent="true"
        android:layout_height="wrap_content">

        <View
            android:layout_width="match_parent"
            android:background="#beecd3"
            android:layout_height="20dp"/>

        <com.example.lenovo.mytest1708.view.CustomAlignTextView
            android:id="@+id/text001"
            android:maxWidth="200dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="自定義textview"
            android:background="#beecd3"
            android:visibility="visible"/>

        <View
            android:layout_width="match_parent"
            android:background="#beecd3"
            android:layout_height="20dp"/>

    </LinearLayout>

</RelativeLayout>

2.自定義textview:

package com.example.lenovo.mytest1708.view;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.support.v7.widget.AppCompatTextView;
import android.util.AttributeSet;
import android.view.View;

import org.json.JSONArray;
import org.json.JSONException;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Created by blueocean on 2017/8/23.
 * desc: 自定義換行對齊textview
 */

public class CustomAlignTextView extends AppCompatTextView {

    private final String namespace = "rong.android.TextView";
    private String text;
    private float textSize;
    private int paddingLeft;
    private int paddingRight;
    private int paddingTop;
    private int paddingBottom;
    private float marginLeft;
    private float marginTop;
    private float marginRight;
    private float marginBottom;
    private int textColor;
    private JSONArray colorIndex;
    private Paint paint1 = new Paint();
    private Paint paintColor = new Paint();
    private float textShowWidth;
    private float Spacing = 0;
    private float LineSpacing = 1.3f;//行與行的間距

    public CustomAlignTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        text = attrs.getAttributeValue("http://schemas.android.com/apk/res/android", "text");
        textSize = attrs.getAttributeIntValue(namespace, "textSize", 25);//字體大小
        textColor = attrs.getAttributeIntValue(namespace, "textColor", Color.BLACK);//字體顏色
        paddingLeft = attrs.getAttributeIntValue(namespace, "paddingLeft", 0);
        paddingRight = attrs.getAttributeIntValue(namespace, "paddingRight", 0);
        paddingTop = attrs.getAttributeIntValue(namespace, "paddingTop", 0);
        paddingBottom = attrs.getAttributeIntValue(namespace, "paddingBottom", 0);
        marginLeft = attrs.getAttributeIntValue(namespace, "marginLeft", 0);
        marginRight = attrs.getAttributeIntValue(namespace, "marginRight", 0);
        marginTop = attrs.getAttributeIntValue(namespace, "marginTop", 0);
        marginBottom = attrs.getAttributeIntValue(namespace, "marginBottom", 0);
        paint1.setTextSize(textSize);
        paint1.setColor(textColor);
        paint1.setAntiAlias(true);
        paintColor.setAntiAlias(true);
        paintColor.setTextSize(textSize);
        paintColor.setColor(Color.BLACK);
    }

    public CustomAlignTextView(Context context, float textSize, int textColor, int paddingLeft, int paddingRight, float marginLeft, float marginRight) {
        super(context);
        this.textSize = textSize;
        this.textColor = textColor;
        this.paddingLeft = paddingLeft;
        this.paddingRight = paddingRight;
        this.marginLeft = marginLeft;
        this.marginRight = marginRight;
        paint1.setTextSize(textSize);
        paint1.setColor(textColor);
        paint1.setAntiAlias(true);
        paintColor.setAntiAlias(true);
        paintColor.setTextSize(textSize);
        paintColor.setColor(Color.BLACK);
    }


    public JSONArray getColorIndex() {
        return colorIndex;
    }

    public void setColorIndex(JSONArray colorIndex) {
        this.colorIndex = colorIndex;
    }

    /**
     * 傳入一個索引，判斷當(dāng)前字是否被高亮
     *
     * @param index
     * @return
     * @throws JSONException
     */
    public boolean isColor(int index) throws JSONException {
        if (colorIndex == null) {
            return false;
        }
        for (int i = 0; i < colorIndex.length(); i++) {
            JSONArray array = colorIndex.getJSONArray(i);
            int start = array.getInt(0);
            int end = array.getInt(1) - 1;
            if (index >= start && index <= end) {
                return true;
            }
        }
        return false;
    }


    @Override
    protected void onDraw(Canvas canvas) {
        //      super.onDraw(canvas);
        View view = (View) this.getParent();
        textShowWidth = view.getMeasuredWidth() - paddingLeft - paddingRight - marginLeft - marginRight;
        int lineCount = 0;

        text = this.getText().toString();//.replaceAll("\n", "\r\n");
        char[] textCharArray = text.toCharArray();
        // 已繪的寬度
        float drawedWidth = 0;
        float charWidth;
        for (int i = 0; i < textCharArray.length; i++) {
            charWidth = paint1.measureText(textCharArray, i, 1);

            if (textCharArray[i] == '\n') {
                lineCount++;
                drawedWidth = 0;
                continue;
            }
            if (textShowWidth - drawedWidth < charWidth) {
                lineCount++;
                drawedWidth = 0;
            }
            boolean color = false;
            try {
                color = isColor(i);
            } catch (JSONException e1) {
                e1.printStackTrace();
            }

            if (color) {

                canvas.drawText(textCharArray, i, 1, paddingLeft + drawedWidth, (lineCount + 1) * textSize * LineSpacing, paintColor);
            } else {

                canvas.drawText(textCharArray, i, 1, paddingLeft + drawedWidth, (lineCount + 1) * textSize * LineSpacing, paint1);
            }

            if (textCharArray[i] > 127 && textCharArray[i] != '躲庄、' && textCharArray[i] != '查剖，' && textCharArray[i] != '。' && textCharArray[i] != '：' && textCharArray[i] != '噪窘！') {

                drawedWidth += charWidth + Spacing;

            } else {
                drawedWidth += charWidth;

            }
        }
        setHeight((int) ((lineCount + 1) * (int) textSize * LineSpacing + 10));
    }

    public void setAlignTextColor(int colorVal) {
        textColor = colorVal;
        paint1.setColor(textColor);
        paintColor.setColor(textColor);

        super.setTextColor(textColor);
    }

    public void setAlignPadding(int left, int right, int top, int bottom) {

        paddingLeft = left;
        paddingRight = right;
        paddingTop = top;
        paddingBottom = bottom;

        super.setPadding(paddingLeft, paddingTop, paddingRight, paddingBottom);
    }

    public void setAlignMargin(float left, float right, float top, float bottom) {

        marginLeft = left;
        marginRight = right;
        marginTop = top;
        marginBottom = bottom;

    }

    public void setAlignSpacing(float spacing) {
        Spacing = spacing;
    }

    public void setAlignLineSpacing(float lineSpacing) {
        LineSpacing = lineSpacing;
    }

    public void setAlignTextSize(float textSize) {
        this.textSize = textSize;
        paint1.setTextSize(textSize);
        paintColor.setTextSize(textSize);
        super.setTextSize(textSize);
    }

    public void setText(String text) {
        this.text = stringFilter(ToDBC(text));
        super.setText(this.text);
    }

    /**
     * 半角轉(zhuǎn)換為全角
     *
     * @param input
     * @return
     */
    public String ToDBC(String input) {
        char[] c = input.toCharArray();
        for (int i = 0; i < c.length; i++) {
            if (c[i] == 12288) {// 全角空格為12288笋庄，半角空格為32
                c[i] = (char) 32;
                continue;
            }
            if (c[i] > 65280 && c[i] < 65375)// 其他字符半角(33-126)與全角(65281-65374)的對應(yīng)關(guān)系是：均相差65248
                c[i] = (char) (c[i] - 65248);
        }
        return new String(c);
    }

    /**
     * 去除特殊字符或?qū)⑺兄形臉?biāo)號替換為英文標(biāo)號
     *
     * @param str
     * @return
     */
    public String stringFilter(String str) {
        str = str.replaceAll("【", "[").replaceAll("】", "]").replaceAll("！", "!").replaceAll("：", ":");// 替換中文標(biāo)號
        String regEx = "[『』]"; // 清除掉特殊字符
        Pattern p = Pattern.compile(regEx);
        Matcher m = p.matcher(str);
        return m.replaceAll("").trim();
    }
}

3.主activity:

package com.example.lenovo.mytest1708;

import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;

import com.example.lenovo.mytest1708.view.CustomAlignTextView;

public class SecondActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);

        TextView tv = (TextView) findViewById(R.id.text);
        CustomAlignTextView text = (CustomAlignTextView) findViewById(R.id.text001);

        String str = "恭喜您成功邀請到測試一森(4544587979182)加入海洋大家庭，快帶小伙伴開啟創(chuàng)業(yè)之旅吧直砂！恭喜您成功邀請到測試一森(4544587979182)加入海洋大家庭菌仁，快帶小伙伴開啟創(chuàng)業(yè)之旅吧！恭喜您成功邀請到測試一森(4544587979182)加入海洋大家庭静暂，快帶小伙伴開啟創(chuàng)業(yè)之旅吧济丘！";

        text.setAlignTextColor(getResources().getColor(R.color.colorAccent));
        text.setAlignTextSize(sp2px(this, 15));
        //top,buttom暫時無效, 可通過view或space來設(shè)置,歡迎高手來指導(dǎo)
        text.setAlignPadding(dip2px(this, 20), dip2px(this, 20), 0, 0);

        tv.setText(str);
        text.setText(str);

    }

    /**
     * 將sp值轉(zhuǎn)換為px值，保證文字大小不變
     *
     * @param spValue
     * @return
     */
    public static int sp2px(Context context, float spValue) {
        final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
        return (int) (spValue * fontScale + 0.5f);
    }

    /**
     * 將px值轉(zhuǎn)換為sp值洽蛀，保證文字大小不變
     *
     * @param pxValue
     * @return
     */

    public int px2sp(Context context, float pxValue) {
        final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
        return (int) (pxValue / fontScale + 0.5f);
    }

    /**
     * 根據(jù)手機的分辨率從 dp 的單位 轉(zhuǎn)成為 px(像素)
     */
    public int dip2px(Context context, float dpValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }

    /**
     * 根據(jù)手機的分辨率從 px(像素) 的單位 轉(zhuǎn)成為 dp
     */
    public int px2dip(Context context, float pxValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (pxValue / scale + 0.5f);
    }
}

可能達(dá)不到某些場景的理想效果, 但是有借鑒的地方, 還請各位大神多多賜教...