青岛做网站网站建设方案选择实现方式

点击文章中的一个单词，获取它。

通过点击的坐标y来获取行数，通过x坐标获取字符偏移量，向前遍历匹配，向后遍历匹配，匹配不成功则跳出循环。截取开始位置和最后位置的字符串。

主要代码

public String getSelectText(int currOff) {int leftOff = currOff, rigthOff = currOff;int length = getText().toString().length();while (true) { //左移currOffif (leftOff <= 0) {break;}if (leftOff != 0) {leftOff = leftOff - 1;if (leftOff < 0) {leftOff = 0;}}String selectText = getText().subSequence(leftOff, currOff).toString();if (!selectText.matches("^[()._0-9a-zA-Z'-]*")) {leftOff += 1;break;}}while (true) { //右移currOffif (rigthOff >= length) {break;}if (rigthOff != 0) {rigthOff = rigthOff + 1;if (rigthOff > length) {rigthOff = length;}}String selectText = getText().subSequence(currOff, rigthOff).toString();if (!selectText.matches("^[()_0-9a-zA-Z'-]*")) {rigthOff -= 1;break;}}String endString = "";try {endString = getText().subSequence(leftOff, rigthOff).toString();if (!endString.trim().isEmpty()) {Selection.setSelection((Spannable) getText(), leftOff, rigthOff);//选中Log.d("WordTextView", "setSelection");} else {Log.d("WordTextView", endString);}} catch (Exception e) {e.printStackTrace();}return endString.trim();}

全部代码

主要控件

public class WordTextView extends androidx.appcompat.widget.AppCompatTextView {private Callback callback;public WordTextView(Context context) {super(context);}public WordTextView(Context context, @Nullable AttributeSet attrs) {super(context, attrs);}public WordTextView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);}public Callback getCallback() {return callback;}public void setCallback(Callback callback) {this.callback = callback;}@SuppressLint("ClickableViewAccessibility")@Overridepublic boolean onTouchEvent(MotionEvent event) {super.onTouchEvent(event);Layout layout = getLayout();switch (event.getAction()) {case MotionEvent.ACTION_DOWN://                Selection.removeSelection(getEditableText());break;case MotionEvent.ACTION_HOVER_MOVE:break;case MotionEvent.ACTION_UP:int line = layout.getLineForVertical((int) event.getY());int off = layout.getOffsetForHorizontal(line, (int) event.getX());String selectText = getSelectText(off);if (selectText != null && callback != null) {callback.getWord(selectText);}Log.d("WordTextView1", off + "," + selectText);break;}return true;}public String getSelectText(int currOff) {int leftOff = currOff, rigthOff = currOff;int length = getText().toString().length();while (true) { //左移currOffif (leftOff <= 0) {break;}if (leftOff != 0) {leftOff = leftOff - 1;if (leftOff < 0) {leftOff = 0;}}String selectText = getText().subSequence(leftOff, currOff).toString();if (!selectText.matches("^[()._0-9a-zA-Z'-]*")) {leftOff += 1;break;}}while (true) { //右移currOffif (rigthOff >= length) {break;}if (rigthOff != 0) {rigthOff = rigthOff + 1;if (rigthOff > length) {rigthOff = length;}}String selectText = getText().subSequence(currOff, rigthOff).toString();if (!selectText.matches("^[()_0-9a-zA-Z'-]*")) {rigthOff -= 1;break;}}String endString = "";try {endString = getText().subSequence(leftOff, rigthOff).toString();if (!endString.trim().isEmpty()) {Selection.setSelection((Spannable) getText(), leftOff, rigthOff);//选中Log.d("WordTextView", "setSelection");} else {Log.d("WordTextView", endString);}} catch (Exception e) {e.printStackTrace();}return endString.trim();}public interface Callback {void getWord(String word);}
}

使用

 WordTextView main_wtv = findViewById(R.id.main_wtv);main_wtv.setText(content);TextView textView = findViewById(R.id.main_tv_word);main_wtv.setCallback(new WordTextView.Callback() {@Overridepublic void getWord(String word) {textView.setText(String.format("单词:%s", word));}});

布局

不要设置inputType，否则点击选词失效

 <com.jn.yyz.testone.WordTextViewandroid:id="@+id/main_wtv"android:layout_width="wrap_content"android:layout_height="wrap_content"android:lineSpacingMultiplier="1.5"android:paddingStart="10dp"android:paddingEnd="10dp"android:text="Hello World!"android:textIsSelectable="true"android:textSize="18sp"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toBottomOf="@id/main_tv_word" />