如何使 a 的文本TextView对齐（文本在左侧和右侧齐平）？
我在这里找到了一个可能的解决方案，但它不起作用（即使您将vertical-center 更改为center_vertical 等）。
user130076
问问题
532012 次
30 回答
277
我不相信 Android 支持充分的理由。
更新 2018-01-01：Android 8.0+ 支持使用TextView.
于 2009-08-18T12:33:37.200 回答
164
@CommonsWare 的答案是正确的。Android 8.0+ 确实支持“完全对齐”（或简称为“对齐”，因为它有时被含糊地提及）。
Android 还支持“刷新左/右文本对齐”。有关区别，请参阅有关正当理由的维基百科文章。许多人认为“对齐”的概念包括完全对齐以及左/右文本对齐，这是他们在想要进行左/右文本对齐时最终搜索的内容。这个答案解释了如何实现左/右文本对齐。
可以实现刷新左/右文本对齐（与问题所问的完全对齐相反）。为了演示，我将使用一个基本的 2 列表单（左列中的标签和右列中的文本字段）作为示例。在此示例中，左列标签中的文本将右对齐，因此它们与右列中的文本字段齐平。
在 XML 布局中，您可以通过在所有 TextView 中添加以下属性来使 TextView 元素本身（左列）与右侧对齐：
<TextView
...
android:layout_gravity="center_vertical|end">
...
</TextView>
但是，如果文本换行成多行，文本仍会在 TextView 内对齐左对齐。添加以下属性使实际文本在 TextView 内右对齐（左对齐）：
<TextView
...
android:gravity="end">
...
</TextView>
因此，重力属性指定了如何对齐 TextView 内的文本layout_gravity指定了如何对齐/布局 TextView 元素本身。
于 2010-05-24T17:58:36.100 回答
145
TextView在Android O中，它本身提供了充分的理由（新的排版对齐）。
你只需要这样做：
科特林
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
textView.justificationMode = JUSTIFICATION_MODE_INTER_WORD
}
爪哇
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
textView.setJustificationMode(JUSTIFICATION_MODE_INTER_WORD);
}
XML
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:justificationMode="inter_word" />
默认为JUSTIFICATION_MODE_NONE（none在 xml 中）。
于 2017-03-24T05:04:13.017 回答
139
为了证明 android 中的文本，我使用了 WebView
setContentView(R.layout.main);
WebView view = new WebView(this);
view.setVerticalScrollBarEnabled(false);
((LinearLayout)findViewById(R.id.inset_web_view)).addView(view);
view.loadData(getString(R.string.hello), "text/html; charset=utf-8", "utf-8");
和html。
<string name="hello">
<![CDATA[
<html>
<head></head>
<body style="text-align:justify;color:gray;background-color:black;">
Lorem ipsum dolor sit amet, consectetur
adipiscing elit. Nunc pellentesque, urna
nec hendrerit pellentesque, risus massa
</body>
</html>
]]>
</string>
我还不能上传图片来证明这一点，但“它对我有用”。
于 2010-11-30T14:23:53.760 回答
101
更新
我们为此创建了一个简单的类。目前有两种方法可以实现您正在寻找的东西。两者都不需要WEBVIEW和SUPPORTS SPANNABLES。
图书馆：https ://github.com/bluejamesbond/TextJustify-Android
支持：Android 2.0 到 5.X
设置
// Please visit Github for latest setup instructions.
截屏
于 2013-12-14T00:02:05.060 回答
44
您可以在 github 中为 Android 项目使用 JustifiedTextView 。这是一个自定义视图，可为您模拟对齐文本。它支持 Android 2.0+ 和从右到左的语言。
于 2015-02-03T13:51:03.023 回答
30
于 2014-07-27T23:46:29.133 回答
26
我找到了解决这个问题的方法，但这可能不是很优雅，但效果还不错。
它的原理是将每一行的空格替换为固定宽度的ImageSpan（颜色是透明的）。
public static void justify(final TextView textView) {
final AtomicBoolean isJustify = new AtomicBoolean(false);
final String textString = textView.getText().toString();
final TextPaint textPaint = textView.getPaint();
final SpannableStringBuilder builder = new SpannableStringBuilder();
textView.post(new Runnable() {
@Override
public void run() {
if (!isJustify.get()) {
final int lineCount = textView.getLineCount();
final int textViewWidth = textView.getWidth();
for (int i = 0; i < lineCount; i++) {
int lineStart = textView.getLayout().getLineStart(i);
int lineEnd = textView.getLayout().getLineEnd(i);
String lineString = textString.substring(lineStart, lineEnd);
if (i == lineCount - 1) {
builder.append(new SpannableString(lineString));
break;
}
String trimSpaceText = lineString.trim();
String removeSpaceText = lineString.replaceAll(" ", "");
float removeSpaceWidth = textPaint.measureText(removeSpaceText);
float spaceCount = trimSpaceText.length() - removeSpaceText.length();
float eachSpaceWidth = (textViewWidth - removeSpaceWidth) / spaceCount;
SpannableString spannableString = new SpannableString(lineString);
for (int j = 0; j < trimSpaceText.length(); j++) {
char c = trimSpaceText.charAt(j);
if (c == ' ') {
Drawable drawable = new ColorDrawable(0x00ffffff);
drawable.setBounds(0, 0, (int) eachSpaceWidth, 0);
ImageSpan span = new ImageSpan(drawable);
spannableString.setSpan(span, j, j + 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
builder.append(spannableString);
}
textView.setText(builder);
isJustify.set(true);
}
}
});
}
我把代码放在GitHub上： https ://github.com/twiceyuan/TextJustification
概述：
于 2017-05-06T09:43:08.327 回答
16
XML 布局：声明 WebView 而不是 TextView
<WebView
android:id="@+id/textContent"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
Java代码：将文本数据设置为WebView
WebView view = (WebView) findViewById(R.id.textContent);
String text;
text = "<html><body><p align=\"justify\">";
text+= "This is the text will be justified when displayed!!!";
text+= "</p></body></html>";
view.loadData(text, "text/html", "utf-8");
这可能会解决您的问题。它完全为我工作。
于 2014-04-29T16:01:10.187 回答
15
非常简单我们可以在 xml 文件中做到这一点
<TextView
android:justificationMode="inter_word"
/>
于 2018-11-21T05:55:01.940 回答
9
这就是我的做法，我认为这是我能做到的最优雅的方式。使用此解决方案，您需要在布局中做的唯一事情是：
- 添加附加
xmlns声明 - 将您
TextView的源文本命名空间从 android 更改为您的新命名空间 - 替换你
TextView的 sx.y.z.JustifiedTextView
这是代码。在我的手机上运行良好（Galaxy Nexus Android 4.0.2、Galaxy Teos Android 2.1）。当然，随意用你的替换我的包名。
/assets/justified_textview.css：
body {
font-size: 1.0em;
color: rgb(180,180,180);
text-align: justify;
}
@media screen and (-webkit-device-pixel-ratio: 1.5) {
/* CSS for high-density screens */
body {
font-size: 1.05em;
}
}
@media screen and (-webkit-device-pixel-ratio: 2.0) {
/* CSS for extra high-density screens */
body {
font-size: 1.1em;
}
}
/res/values/attrs.xml：
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="JustifiedTextView">
<attr name="text" format="reference" />
</declare-styleable>
</resources>
/res/layout/test.xml：
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:myapp="http://schemas.android.com/apk/res/net.bicou.myapp"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<net.bicou.myapp.widget.JustifiedTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
myapp:text="@string/surv1_1" />
</LinearLayout>
</ScrollView>
/src/net/bicou/myapp/widget/JustifiedTextView.java：
package net.bicou.myapp.widget;
import net.bicou.myapp.R;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Color;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;
import android.webkit.WebView;
public class JustifiedTextView extends WebView {
public JustifiedTextView(final Context context) {
this(context, null, 0);
}
public JustifiedTextView(final Context context, final AttributeSet attrs) {
this(context, attrs, 0);
}
public JustifiedTextView(final Context context, final AttributeSet attrs, final int defStyle) {
super(context, attrs, defStyle);
if (attrs != null) {
final TypedValue tv = new TypedValue();
final TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.JustifiedTextView, defStyle, 0);
if (ta != null) {
ta.getValue(R.styleable.JustifiedTextView_text, tv);
if (tv.resourceId > 0) {
final String text = context.getString(tv.resourceId).replace("\n", "<br />");
loadDataWithBaseURL("file:///android_asset/",
"<html><head>" +
"<link rel=\"stylesheet\" type=\"text/css\" href=\"justified_textview.css\" />" +
"</head><body>" + text + "</body></html>",
"text/html", "UTF8", null);
setTransparentBackground();
}
}
}
}
public void setTransparentBackground() {
try {
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
} catch (final NoSuchMethodError e) {
}
setBackgroundColor(Color.TRANSPARENT);
setBackgroundDrawable(null);
setBackgroundResource(0);
}
}
我们需要将渲染设置为软件，以便在 Android 3+ 上获得透明背景。因此，针对旧版本的 Android 的 try-catch。
希望这可以帮助！
PS：请不要将其添加到您在 Android 3+ 上的整个活动中以获得预期的行为可能会有用：
android:hardwareAccelerated="false"
于 2012-03-11T13:12:17.780 回答
9
虽然仍未完成对齐文本，但您现在可以使用android:breakStrategy="balanced"API 23 及更高版本来平衡行长
http://developer.android.com/reference/android/widget/TextView.html#attr_android:breakStrategy
于 2016-01-13T20:52:07.317 回答
9
用于 TextView XML 的 Android 文本对齐
只需在 XML 中使用 android text-justify。您可以简单地在 textview 小部件中实现。
<TextView
android:justificationMode="inter_word"
/>
默认为 android:justificationMode="none"
于 2020-01-21T07:03:43.907 回答
6
我编写了自己的类来解决这个问题，这里只是你必须调用带有两个参数的静态 justify 函数
- 文本视图对象
- 内容宽度（文本视图的总宽度）
//主要活动
package com.fawad.textjustification;
import android.app.Activity;
import android.database.Cursor;
import android.graphics.Point;
import android.graphics.Typeface;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.Gravity;
import android.view.Menu;
import android.widget.TextView;
public class MainActivity extends Activity {
static Point size;
static float density;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Display display = getWindowManager().getDefaultDisplay();
size=new Point();
DisplayMetrics dm=new DisplayMetrics();
display.getMetrics(dm);
density=dm.density;
display.getSize(size);
TextView tv=(TextView)findViewById(R.id.textView1);
Typeface typeface=Typeface.createFromAsset(this.getAssets(), "Roboto-Medium.ttf");
tv.setTypeface(typeface);
tv.setLineSpacing(0f, 1.2f);
tv.setTextSize(10*MainActivity.density);
//some random long text
String myText=getResources().getString(R.string.my_text);
tv.setText(myText);
TextJustification.justify(tv,size.x);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
//TextJustificationClass
package com.fawad.textjustification;
import java.util.ArrayList;
import android.graphics.Paint;
import android.text.TextUtils;
import android.widget.TextView;
public class TextJustification {
public static void justify(TextView textView,float contentWidth) {
String text=textView.getText().toString();
Paint paint=textView.getPaint();
ArrayList<String> lineList=lineBreak(text,paint,contentWidth);
textView.setText(TextUtils.join(" ", lineList).replaceFirst("\\s", ""));
}
private static ArrayList<String> lineBreak(String text,Paint paint,float contentWidth){
String [] wordArray=text.split("\\s");
ArrayList<String> lineList = new ArrayList<String>();
String myText="";
for(String word:wordArray){
if(paint.measureText(myText+" "+word)<=contentWidth)
myText=myText+" "+word;
else{
int totalSpacesToInsert=(int)((contentWidth-paint.measureText(myText))/paint.measureText(" "));
lineList.add(justifyLine(myText,totalSpacesToInsert));
myText=word;
}
}
lineList.add(myText);
return lineList;
}
private static String justifyLine(String text,int totalSpacesToInsert){
String[] wordArray=text.split("\\s");
String toAppend=" ";
while((totalSpacesToInsert)>=(wordArray.length-1)){
toAppend=toAppend+" ";
totalSpacesToInsert=totalSpacesToInsert-(wordArray.length-1);
}
int i=0;
String justifiedText="";
for(String word:wordArray){
if(i<totalSpacesToInsert)
justifiedText=justifiedText+word+" "+toAppend;
else
justifiedText=justifiedText+word+toAppend;
i++;
}
return justifiedText;
}
}
//XML
<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=".MainActivity"
>
<ScrollView
android:id="@+id/scrollView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
</LinearLayout>
</ScrollView>
</RelativeLayout>
于 2013-07-23T10:04:53.057 回答
5
FILL_HORIZONTAL相当于 CENTER_HORIZONTAL。你可以在 textview 的源代码中看到这个代码片段：
case Gravity.CENTER_HORIZONTAL:
case Gravity.FILL_HORIZONTAL:
return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
getCompoundPaddingLeft() - getCompoundPaddingRight())) /
getHorizontalFadingEdgeLength();
于 2012-08-06T02:17:24.507 回答
5
这个问题有一个CustomView，这个自定义文本视图是支持Justified Text View。
搜刮这个：JustifiedTextView
import java.util.ArrayList;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.text.TextPaint;
import android.view.View;
public class JustifiedTextView extends View {
String text;
ArrayList<Line> linesCollection = new ArrayList<Line>();
TextPaint textPaint;
Typeface font;
int textColor;
float textSize = 42f, lineHeight = 57f, wordSpacing = 15f, lineSpacing = 15f;
float onBirim, w, h;
float leftPadding, rightPadding;
public JustifiedTextView(Context context, String text) {
super(context);
this.text = text;
init();
}
private void init() {
textPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
textColor = Color.BLACK;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (font != null) {
font = Typeface.createFromAsset(getContext().getAssets(), "font/Trykker-Regular.ttf");
textPaint.setTypeface(font);
}
textPaint.setColor(textColor);
int minw = getPaddingLeft() + getPaddingRight() + getSuggestedMinimumWidth();
w = resolveSizeAndState(minw, widthMeasureSpec, 1);
h = MeasureSpec.getSize(widthMeasureSpec);
onBirim = 0.009259259f * w;
lineHeight = textSize + lineSpacing;
leftPadding = 3 * onBirim + getPaddingLeft();
rightPadding = 3 * onBirim + getPaddingRight();
textPaint.setTextSize(textSize);
wordSpacing = 15f;
Line lineBuffer = new Line();
this.linesCollection.clear();
String[] lines = text.split("\n");
for (String line : lines) {
String[] words = line.split(" ");
lineBuffer = new Line();
float lineWidth = leftPadding + rightPadding;
float totalWordWidth = 0;
for (String word : words) {
float ww = textPaint.measureText(word) + wordSpacing;
if (lineWidth + ww + (lineBuffer.getWords().size() * wordSpacing) > w) {// is
lineBuffer.addWord(word);
totalWordWidth += textPaint.measureText(word);
lineBuffer.setSpacing((w - totalWordWidth - leftPadding - rightPadding) / (lineBuffer.getWords().size() - 1));
this.linesCollection.add(lineBuffer);
lineBuffer = new Line();
totalWordWidth = 0;
lineWidth = leftPadding + rightPadding;
} else {
lineBuffer.setSpacing(wordSpacing);
lineBuffer.addWord(word);
totalWordWidth += textPaint.measureText(word);
lineWidth += ww;
}
}
this.linesCollection.add(lineBuffer);
}
setMeasuredDimension((int) w, (int) ((this.linesCollection.size() + 1) * lineHeight + (10 * onBirim)));
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawLine(0f, 10f, getMeasuredWidth(), 10f, textPaint);
float x, y = lineHeight + onBirim;
for (Line line : linesCollection) {
x = leftPadding;
for (String s : line.getWords()) {
canvas.drawText(s, x, y, textPaint);
x += textPaint.measureText(s) + line.spacing;
}
y += lineHeight;
}
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public Typeface getFont() {
return font;
}
public void setFont(Typeface font) {
this.font = font;
}
public float getLineHeight() {
return lineHeight;
}
public void setLineHeight(float lineHeight) {
this.lineHeight = lineHeight;
}
public float getLeftPadding() {
return leftPadding;
}
public void setLeftPadding(float leftPadding) {
this.leftPadding = leftPadding;
}
public float getRightPadding() {
return rightPadding;
}
public void setRightPadding(float rightPadding) {
this.rightPadding = rightPadding;
}
public void setWordSpacing(float wordSpacing) {
this.wordSpacing = wordSpacing;
}
public float getWordSpacing() {
return wordSpacing;
}
public float getLineSpacing() {
return lineSpacing;
}
public void setLineSpacing(float lineSpacing) {
this.lineSpacing = lineSpacing;
}
class Line {
ArrayList<String> words = new ArrayList<String>();
float spacing = 15f;
public Line() {
}
public Line(ArrayList<String> words, float spacing) {
this.words = words;
this.spacing = spacing;
}
public void setSpacing(float spacing) {
this.spacing = spacing;
}
public float getSpacing() {
return spacing;
}
public void addWord(String s) {
words.add(s);
}
public ArrayList<String> getWords() {
return words;
}
}
}
将上述类添加到您的 src 文件夹并使用此示例代码添加到您的布局中：
JustifiedTextView jtv= new JustifiedTextView(getApplicationContext(), "Lorem ipsum dolor sit amet... ");
LinearLayout place = (LinearLayout) findViewById(R.id.book_profile_content);
place.addView(jtv);
于 2013-12-06T23:31:04.800 回答
5
在 github 上看到这里
只需在您的项目中导入两个文件“TextJustifyUtils.java”和“TextViewEx.java”。
public class TextJustifyUtils {
// Please use run(...) instead
public static void justify(TextView textView) {
Paint paint = new Paint();
String[] blocks;
float spaceOffset = 0;
float textWrapWidth = 0;
int spacesToSpread;
float wrappedEdgeSpace;
String block;
String[] lineAsWords;
String wrappedLine;
String smb = "";
Object[] wrappedObj;
// Pull widget properties
paint.setColor(textView.getCurrentTextColor());
paint.setTypeface(textView.getTypeface());
paint.setTextSize(textView.getTextSize());
textWrapWidth = textView.getWidth();
spaceOffset = paint.measureText(" ");
blocks = textView.getText().toString().split("((?<=\n)|(?=\n))");
if (textWrapWidth < 20) {
return;
}
for (int i = 0; i < blocks.length; i++) {
block = blocks[i];
if (block.length() == 0) {
continue;
} else if (block.equals("\n")) {
smb += block;
continue;
}
block = block.trim();
if (block.length() == 0)
continue;
wrappedObj = TextJustifyUtils.createWrappedLine(block, paint,
spaceOffset, textWrapWidth);
wrappedLine = ((String) wrappedObj[0]);
wrappedEdgeSpace = (Float) wrappedObj[1];
lineAsWords = wrappedLine.split(" ");
spacesToSpread = (int) (wrappedEdgeSpace != Float.MIN_VALUE ? wrappedEdgeSpace
/ spaceOffset
: 0);
for (String word : lineAsWords) {
smb += word + " ";
if (--spacesToSpread > 0) {
smb += " ";
}
}
smb = smb.trim();
if (blocks[i].length() > 0) {
blocks[i] = blocks[i].substring(wrappedLine.length());
if (blocks[i].length() > 0) {
smb += "\n";
}
i--;
}
}
textView.setGravity(Gravity.LEFT);
textView.setText(smb);
}
protected static Object[] createWrappedLine(String block, Paint paint,
float spaceOffset, float maxWidth) {
float cacheWidth = maxWidth;
float origMaxWidth = maxWidth;
String line = "";
for (String word : block.split("\\s")) {
cacheWidth = paint.measureText(word);
maxWidth -= cacheWidth;
if (maxWidth <= 0) {
return new Object[] { line, maxWidth + cacheWidth + spaceOffset };
}
line += word + " ";
maxWidth -= spaceOffset;
}
if (paint.measureText(block) <= origMaxWidth) {
return new Object[] { block, Float.MIN_VALUE };
}
return new Object[] { line, maxWidth };
}
final static String SYSTEM_NEWLINE = "\n";
final static float COMPLEXITY = 5.12f; // Reducing this will increase
// efficiency but will decrease
// effectiveness
final static Paint p = new Paint();
public static void run(final TextView tv, float origWidth) {
String s = tv.getText().toString();
p.setTypeface(tv.getTypeface());
String[] splits = s.split(SYSTEM_NEWLINE);
float width = origWidth - 5;
for (int x = 0; x < splits.length; x++)
if (p.measureText(splits[x]) > width) {
splits[x] = wrap(splits[x], width, p);
String[] microSplits = splits[x].split(SYSTEM_NEWLINE);
for (int y = 0; y < microSplits.length - 1; y++)
microSplits[y] = justify(removeLast(microSplits[y], " "),
width, p);
StringBuilder smb_internal = new StringBuilder();
for (int z = 0; z < microSplits.length; z++)
smb_internal.append(microSplits[z]
+ ((z + 1 < microSplits.length) ? SYSTEM_NEWLINE
: ""));
splits[x] = smb_internal.toString();
}
final StringBuilder smb = new StringBuilder();
for (String cleaned : splits)
smb.append(cleaned + SYSTEM_NEWLINE);
tv.setGravity(Gravity.LEFT);
tv.setText(smb);
}
private static String wrap(String s, float width, Paint p) {
String[] str = s.split("\\s"); // regex
StringBuilder smb = new StringBuilder(); // save memory
smb.append(SYSTEM_NEWLINE);
for (int x = 0; x < str.length; x++) {
float length = p.measureText(str[x]);
String[] pieces = smb.toString().split(SYSTEM_NEWLINE);
try {
if (p.measureText(pieces[pieces.length - 1]) + length > width)
smb.append(SYSTEM_NEWLINE);
} catch (Exception e) {
}
smb.append(str[x] + " ");
}
return smb.toString().replaceFirst(SYSTEM_NEWLINE, "");
}
private static String removeLast(String s, String g) {
if (s.contains(g)) {
int index = s.lastIndexOf(g);
int indexEnd = index + g.length();
if (index == 0)
return s.substring(1);
else if (index == s.length() - 1)
return s.substring(0, index);
else
return s.substring(0, index) + s.substring(indexEnd);
}
return s;
}
private static String justifyOperation(String s, float width, Paint p) {
float holder = (float) (COMPLEXITY * Math.random());
while (s.contains(Float.toString(holder)))
holder = (float) (COMPLEXITY * Math.random());
String holder_string = Float.toString(holder);
float lessThan = width;
int timeOut = 100;
int current = 0;
while (p.measureText(s) < lessThan && current < timeOut) {
s = s.replaceFirst(" ([^" + holder_string + "])", " "
+ holder_string + "$1");
lessThan = p.measureText(holder_string) + lessThan
- p.measureText(" ");
current++;
}
String cleaned = s.replaceAll(holder_string, " ");
return cleaned;
}
private static String justify(String s, float width, Paint p) {
while (p.measureText(s) < width) {
s = justifyOperation(s, width, p);
}
return s;
}
}
和
public class TextViewEx extends TextView {
private Paint paint = new Paint();
private String[] blocks;
private float spaceOffset = 0;
private float horizontalOffset = 0;
private float verticalOffset = 0;
private float horizontalFontOffset = 0;
private float dirtyRegionWidth = 0;
private boolean wrapEnabled = false;
int left, top, right, bottom = 0;
private Align _align = Align.LEFT;
private float strecthOffset;
private float wrappedEdgeSpace;
private String block;
private String wrappedLine;
private String[] lineAsWords;
private Object[] wrappedObj;
private Bitmap cache = null;
private boolean cacheEnabled = false;
public TextViewEx(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// set a minimum of left and right padding so that the texts are not too
// close to the side screen
// this.setPadding(10, 0, 10, 0);
}
public TextViewEx(Context context, AttributeSet attrs) {
super(context, attrs);
// this.setPadding(10, 0, 10, 0);
}
public TextViewEx(Context context) {
super(context);
// this.setPadding(10, 0, 10, 0);
}
@Override
public void setPadding(int left, int top, int right, int bottom) {
// TODO Auto-generated method stub
super.setPadding(left + 10, top, right + 10, bottom);
}
@Override
public void setDrawingCacheEnabled(boolean cacheEnabled) {
this.cacheEnabled = cacheEnabled;
}
public void setText(String st, boolean wrap) {
wrapEnabled = wrap;
super.setText(st);
}
public void setTextAlign(Align align) {
_align = align;
}
@SuppressLint("NewApi")
@Override
protected void onDraw(Canvas canvas) {
// If wrap is disabled then,
// request original onDraw
if (!wrapEnabled) {
super.onDraw(canvas);
return;
}
// Active canas needs to be set
// based on cacheEnabled
Canvas activeCanvas = null;
// Set the active canvas based on
// whether cache is enabled
if (cacheEnabled) {
if (cache != null) {
// Draw to the OS provided canvas
// if the cache is not empty
canvas.drawBitmap(cache, 0, 0, paint);
return;
} else {
// Create a bitmap and set the activeCanvas
// to the one derived from the bitmap
cache = Bitmap.createBitmap(getWidth(), getHeight(),
Config.ARGB_4444);
activeCanvas = new Canvas(cache);
}
} else {
// Active canvas is the OS
// provided canvas
activeCanvas = canvas;
}
// Pull widget properties
paint.setColor(getCurrentTextColor());
paint.setTypeface(getTypeface());
paint.setTextSize(getTextSize());
paint.setTextAlign(_align);
paint.setFlags(Paint.ANTI_ALIAS_FLAG);
// minus out the paddings pixel
dirtyRegionWidth = getWidth() - getPaddingLeft() - getPaddingRight();
int maxLines = Integer.MAX_VALUE;
int currentapiVersion = android.os.Build.VERSION.SDK_INT;
if (currentapiVersion >= android.os.Build.VERSION_CODES.JELLY_BEAN) {
maxLines = getMaxLines();
}
int lines = 1;
blocks = getText().toString().split("((?<=\n)|(?=\n))");
verticalOffset = horizontalFontOffset = getLineHeight() - 0.5f; // Temp
// fix
spaceOffset = paint.measureText(" ");
for (int i = 0; i < blocks.length && lines <= maxLines; i++) {
block = blocks[i];
horizontalOffset = 0;
if (block.length() == 0) {
continue;
} else if (block.equals("\n")) {
verticalOffset += horizontalFontOffset;
continue;
}
block = block.trim();
if (block.length() == 0) {
continue;
}
wrappedObj = TextJustifyUtils.createWrappedLine(block, paint,
spaceOffset, dirtyRegionWidth);
wrappedLine = ((String) wrappedObj[0]);
wrappedEdgeSpace = (Float) wrappedObj[1];
lineAsWords = wrappedLine.split(" ");
strecthOffset = wrappedEdgeSpace != Float.MIN_VALUE ? wrappedEdgeSpace
/ (lineAsWords.length - 1)
: 0;
for (int j = 0; j < lineAsWords.length; j++) {
String word = lineAsWords[j];
if (lines == maxLines && j == lineAsWords.length - 1) {
activeCanvas.drawText("...", horizontalOffset,
verticalOffset, paint);
} else if (j == 0) {
// if it is the first word of the line, text will be drawn
// starting from right edge of textview
if (_align == Align.RIGHT) {
activeCanvas.drawText(word, getWidth()
- (getPaddingRight()), verticalOffset, paint);
// add in the paddings to the horizontalOffset
horizontalOffset += getWidth() - (getPaddingRight());
} else {
activeCanvas.drawText(word, getPaddingLeft(),
verticalOffset, paint);
horizontalOffset += getPaddingLeft();
}
} else {
activeCanvas.drawText(word, horizontalOffset,
verticalOffset, paint);
}
if (_align == Align.RIGHT)
horizontalOffset -= paint.measureText(word) + spaceOffset
+ strecthOffset;
else
horizontalOffset += paint.measureText(word) + spaceOffset
+ strecthOffset;
}
lines++;
if (blocks[i].length() > 0) {
blocks[i] = blocks[i].substring(wrappedLine.length());
verticalOffset += blocks[i].length() > 0 ? horizontalFontOffset
: 0;
i--;
}
}
if (cacheEnabled) {
// Draw the cache onto the OS provided
// canvas.
canvas.drawBitmap(cache, 0, 0, paint);
}
}
}
现在，如果您使用普通的 textView，例如：
<TextView
android:id="@+id/original"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/lorum_ipsum" />
只需使用
<yourpackagename.TextViewEx
android:id="@+id/changed"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/lorum_ipsum" />
定义一个变量并将 justify 设置为 true，
TextViewEx changed = (TextViewEx) findViewById(R.id.changed);
changed.setText(getResources().getString(R.string.lorum_ipsum),true);
于 2018-06-04T07:35:56.253 回答
3
TextView 内容对齐： 简单的人只需在 TextView 标记中使用 android:justificationMode="inter_word" 。
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="92dp"
android:text="@string/contents"
android:layout_margin="20dp"
android:justificationMode="inter_word"
/>
于 2020-05-10T20:23:00.493 回答
3
试试这个，
<TextView
.......................................
.......................................
.......................................
android:layout_gravity="center_vertical|end"
android:justificationMode="inter_word"
.......................................
.......................................
/>
希望这有帮助！
于 2020-07-06T14:55:23.117 回答
3
android:justificationMode="inter_word"
于 2021-07-12T04:48:54.293 回答
2
我认为有两种选择：
使用像 Pango 这样专门通过 NDK 进行此操作的工具，并将文本渲染到 OpenGL 或其他表面。
使用Paint.measureText()和朋友来获取单词的长度，并在自定义视图中的 Canvas 上手动布置它们。
于 2011-03-09T03:32:13.340 回答
2
在 android 上，要左对齐文本而不截断背景颜色，试试这个，它对我有用，在 android、ff、ie 和 chrome 上产生一致的结果，但你必须测量文本之间的空间在计算填充时。
<td style="font-family:Calibri,Arial;
font-size:15px;
font-weight:800;
background-color:#f5d5fd;
color:black;
border-style:solid;
border-width:1px;
border-color:#bd07eb;
padding-left:10px;
padding-right:1000px;
padding-top:3px;
padding-bottom:3px;
>
hack是padding-right:1000px;将文本推到最左端。
任何在 css 或 html 中向左或对齐代码的尝试都会导致背景只有一半宽度。
于 2012-05-05T21:32:01.253 回答
2
Android 尚不支持完全对齐。我们可以使用 Webview 并证明 HTML 而不是使用 textview。它工作得很好。如果你们不清楚，请随时问我:)
于 2013-01-14T06:20:43.290 回答
1
对于 html 格式，您不需要调用 Webkit，您可以使用它Html.fromHtml(text)来完成这项工作。
来源：http: //developer.android.com/guide/topics/resources/string-resource.html
于 2012-02-28T15:22:01.347 回答
1
这行代码将使您的文本合理
android:justificationMode="inter_word"
于 2020-10-06T11:55:46.253 回答
1
您可以证明添加 android:justificationMode="inter_word"到 xml 的 textview 的内容是合理的。
重要提示：属性 justificationMode 仅在 API 级别 26 中使用。
于 2021-12-30T14:54:31.230 回答
0
您可以在 xml 中使用 justificationMode 作为 inter_word。您必须记住，此属性可用于 api 级别 26 及更高级别。为此，您可以将 targetApi 分配为 o。完整代码如下
<com.google.android.material.textview.MaterialTextView
...
android:justificationMode="inter_word"
tools:targetApi="o" />
于 2020-10-27T06:46:14.670 回答
0
请在 8.0 以下尝试此代码
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:gravity="center|start"/>
于 2021-06-30T20:36:36.653 回答
-4
尝试使用 < RelativeLayout >（确保填充父项），然后添加android:layout_alignParentLeft="true"和
android:layout_alignParentRight="true"到您想要的外部左侧和右侧的元素。
BLAM，有道理！
于 2011-03-09T20:11:49.357 回答
-7
你必须设置
android:layout_height="wrap_content"
和
android:layout_centerInParent="true"
于 2009-12-26T15:33:11.587 回答