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-
-
- import android.content.ClipboardManager;
- import android.content.Context;
- import android.content.res.TypedArray;
- import android.graphics.Paint;
- import android.os.Build;
- import android.text.TextUtils;
- import android.util.AttributeSet;
- import android.util.Log;
- import android.widget.TextView;
-
- import java.lang.reflect.Method;
- import java.util.ArrayList;
- import java.util.List;
-
- /**
- * 对齐的TextView
- * <p>
- * 为了能够使TextView能够很好的进行排版,同时考虑到原生TextView中以word进行分割排版,
- * 那么我们可以将要换行的地方进行添加空格处理,这样就可以在合适的位置换行,同时也不会
- * 打乱原生的TextView的排版换行选择复制等问题。为了能够使右端尽可能的对齐,将右侧多出的空隙
- * 尽可能的分配到该行的标点后面。达到两段对齐的效果。
- * </p>
- * <p>
- * 重新设置文本前,请调用reset()进行状态重置。
- * </p>
- * Created by Rivers on 6/28/18.
- */
- public class AlignTextView extends TextView {
- private final static String TAG = AlignTextView.class.getSimpleName();
- private final static char SPACE = ' '; //空格;
- private List<Integer> addCharPosition = new ArrayList<Integer>(); //增加空格的位置
- private static List<Character> punctuation = new ArrayList<Character>(); //标点符号
- private CharSequence oldText = ""; //旧文本,本来应该显示的文本
- private CharSequence newText = ""; //新文本,真正显示的文本
- private boolean inProcess = false; //旧文本是否已经处理为新文本
- private boolean isAddPadding = false; //是否添加过边距
- private boolean isConvert = false; //是否转换标点符号
-
- //标点符号用于在textview右侧多出空间时,将空间加到标点符号的后面,以便于右端对齐
- static {
- punctuation.clear();
- punctuation.add(',');
- punctuation.add('.');
- punctuation.add('?');
- punctuation.add('!');
- punctuation.add(';');
- punctuation.add(',');
- punctuation.add('。');
- punctuation.add('?');
- punctuation.add('!');
- punctuation.add(';');
- punctuation.add(')');
- punctuation.add('】');
- punctuation.add(')');
- punctuation.add(']');
- punctuation.add('}');
- }
-
- public AlignTextView(Context context) {
- super(context);
- }
-
- public AlignTextView(Context context, AttributeSet attrs) {
- super(context, attrs);
- TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.AlignTextView);
- isConvert = ta.getBoolean(R.styleable.AlignTextView_punctuationConvert, false);
- ta.recycle();
-
- //判断使用xml中是用android:text
- TypedArray tsa = context.obtainStyledAttributes(attrs, new int[]{
- android.R.attr.text
- });
- String text = tsa.getString(0);
- tsa.recycle();
- if (!TextUtils.isEmpty(text)) {
- setText(text);
- }
- }
-
- /**
- * 监听文本复制,对于复制的文本进行空格剔除
- *
- * @param id 操作id(复制,全部选择等)
- * @return 是否操作成功
- */
- @Override
- public boolean onTextContextMenuItem(int id) {
- if (id == android.R.id.copy) {
-
- if (isFocused()) {
- final int selStart = getSelectionStart();
- final int selEnd = getSelectionEnd();
-
- int min = Math.max(0, Math.min(selStart, selEnd));
- int max = Math.max(0, Math.max(selStart, selEnd));
-
- //利用反射获取选择的文本信息,同时关闭操作框
- try {
- Class cls = getClass().getSuperclass();
- Method getSelectTextMethod = cls.getDeclaredMethod("getTransformedText", new
- Class[]{int.class, int.class});
- getSelectTextMethod.setAccessible(true);
- CharSequence selectedText = (CharSequence) getSelectTextMethod.invoke(this,
- min, max);
- copy(selectedText.toString());
-
- Method closeMenuMethod;
- if (Build.VERSION.SDK_INT < 23) {
- closeMenuMethod = cls.getDeclaredMethod("stopSelectionActionMode");
- } else {
- closeMenuMethod = cls.getDeclaredMethod("stopTextActionMode");
- }
- closeMenuMethod.setAccessible(true);
- closeMenuMethod.invoke(this);
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- return true;
- } else {
- return super.onTextContextMenuItem(id);
- }
- }
-
-
- /**
- * 复制文本到剪切板,去除添加字符
- *
- * @param text 文本
- */
- private void copy(String text) {
- ClipboardManager clipboard = (ClipboardManager) getContext().getSystemService(Context
- .CLIPBOARD_SERVICE);
- int start = newText.toString().indexOf(text);
- int end = start + text.length();
- StringBuilder sb = new StringBuilder(text);
- for (int i = addCharPosition.size() - 1; i >= 0; i--) {
- int position = addCharPosition.get(i);
- if (position < end && position >= start) {
- sb.deleteCharAt(position - start);
- }
- }
- try {
- android.content.ClipData clip = android.content.ClipData.newPlainText(null, sb.toString());
- clipboard.setPrimaryClip(clip);
- }catch (Exception e){
- Log.e(TAG, e.getMessage());
- }
- }
-
- /**
- * 重置状态
- */
- public void reset(){
- inProcess = false;
- addCharPosition.clear();
- newText = "";
- newText = "";
- }
-
- /**
- * 处理多行文本
- *
- * @param paint 画笔
- * @param text 文本
- * @param width 最大可用宽度
- * @return 处理后的文本
- */
- private String processText(Paint paint, String text, int width) {
- if (text == null || text.length() == 0) {
- return "";
- }
- String[] lines = text.split("\\n");
- StringBuilder newText = new StringBuilder();
- for (String line : lines) {
- newText.append('\n');
- newText.append(processLine(paint, line, width, newText.length() - 1));
- }
- if (newText.length() > 0) {
- newText.deleteCharAt(0);
- }
- return newText.toString();
- }
-
-
- /**
- * 处理单行文本
- *
- * @param paint 画笔
- * @param text 文本
- * @param width 最大可用宽度
- * @param addCharacterStartPosition 添加文本的起始位置
- * @return 处理后的文本
- */
- private String processLine(Paint paint, String text, int width, int addCharacterStartPosition) {
- if (text == null || text.length() == 0) {
- return "";
- }
-
- StringBuilder old = new StringBuilder(text);
- int startPosition = 0; // 起始位置
-
- float chineseWidth = paint.measureText("中");
- float spaceWidth = paint.measureText(SPACE + "");
-
- //最大可容纳的汉字,每一次从此位置向后推进计算
- int maxChineseCount = (int) (width / chineseWidth);
-
- //减少一个汉字宽度,保证每一行前后都有一个空格
- maxChineseCount--;
-
- //如果不能容纳汉字,直接返回空串
- if (maxChineseCount <= 0) {
- return "";
- }
-
- for (int i = maxChineseCount; i < old.length(); i++) {
- if (paint.measureText(old.substring(startPosition, i + 1)) > (width - spaceWidth)) {
-
- //右侧多余空隙宽度
- float gap = (width - spaceWidth - paint.measureText(old.substring(startPosition,
- i)));
-
- List<Integer> positions = new ArrayList<Integer>();
- for (int j = startPosition; j < i; j++) {
- char ch = old.charAt(j);
- if (punctuation.contains(ch)) {
- positions.add(j + 1);
- }
- }
-
- //空隙最多可以使用几个空格替换
- int number = (int) (gap / spaceWidth);
-
- //多增加的空格数量
- int use = 0;
-
- if (positions.size() > 0) {
- for (int k = 0; k < positions.size() && number > 0; k++) {
- int times = number / (positions.size() - k);
- int position = positions.get(k / positions.size());
- for (int m = 0; m < times; m++) {
- old.insert(position + m, SPACE);
- addCharPosition.add(position + m + addCharacterStartPosition);
- use++;
- number--;
- }
- }
- }
-
- //指针移动,将段尾添加空格进行分行处理
- i = i + use;
- old.insert(i, SPACE);
- addCharPosition.add(i + addCharacterStartPosition);
-
- startPosition = i + 1;
- i = i + maxChineseCount;
- }
- }
-
- return old.toString();
- }
-
- @Override
- public void setText(CharSequence text, BufferType type) {
- //父类初始化的时候子类暂时没有初始化, 覆盖方法会被执行,屏蔽掉
- if (addCharPosition == null) {
- super.setText(text, type);
- return;
- }
- if (!inProcess && (text != null && !text.equals(newText))) {
- oldText = text;
- process(false);
- super.setText(newText, type);
- } else {
- //恢复初始状态
- inProcess = false;
- super.setText(text, type);
- }
- }
-
- /**
- * 获取真正的text
- *
- * @return 返回text
- */
- public CharSequence getRealText() {
- return oldText;
- }
-
- /**
- * 文本转化
- *
- * @param setText 是否设置textView的文本
- */
- private void process(boolean setText) {
- if (oldText == null) {
- oldText = "";
- }
- if (!inProcess && getVisibility() == VISIBLE) {
- addCharPosition.clear();
-
- //转化字符,5.0系统对字体处理有所变动
- if (isConvert) {
- oldText = AlignTextViewUtil.replacePunctuation(oldText.toString());
- }
-
- if (getWidth() == 0) {
- //没有测量完毕,等待测量完毕后处理
- post(new Runnable() {
- @Override
- public void run() {
- process(true);
- }
- });
- return;
- }
-
- //添加过边距之后不再次添加
- if (!isAddPadding) {
- int spaceWidth = (int) (getPaint().measureText(SPACE + ""));
- newText = processText(getPaint(), oldText.toString(), getWidth() - getPaddingLeft
- () -
- getPaddingRight() - spaceWidth);
- setPadding(getPaddingLeft() + spaceWidth, getPaddingTop(), getPaddingRight(),
- getPaddingBottom());
- isAddPadding = true;
- } else {
- newText = processText(getPaint(), oldText.toString(), getWidth() - getPaddingLeft
- () -
- getPaddingRight());
- }
- inProcess = true;
- if (setText) {
- setText(newText);
- }
- }
- }
-
- /**
- * 是否转化标点符号,将中文标点转化为英文标点
- *
- * @param convert 是否转化
- */
- public void setPunctuationConvert(boolean convert) {
- isConvert = convert;
- }
- }

- /**
- * 文本工具
- */
- public class AlignTextViewUtil {
-
- /**
- * 将中文标点替换为英文标点
- *
- * @param text 要替换的文本
- * @return 替换后的文本
- */
- public static String replacePunctuation(String text) {
- text = text.replace(',', ',').replace('。', '.').replace('【', '[').replace('】', ']')
- .replace('?', '?').replace('!', '!').replace('(', '(').replace(')', ')').replace
- ('“', '"').replace('”', '"');
- return text;
- }
- }

res/values/aligntextview_attr.xml
- <?xml version="1.0" encoding="utf-8"?>
- <resources>
-
- <!-- 末行对齐方式 -->
- <declare-styleable name="AlignTextView">
- <attr name="align" format="enum">
- <enum name="left" value="0"/>
- <enum name="center" value="1"/>
- <enum name="right" value="2"/>
- </attr>
- </declare-styleable>
-
- <!-- 标点转换 -->
- <declare-styleable name="CBAlignTextView">
- <attr name="punctuationConvert" format="boolean"/>
- </declare-styleable>
-
-
- </resources>

如果需要支持android默认的选择复制,请在xml中加入以下代码:
android:textIsSelectable="true"
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