使用WebView在Android应用程序中对齐文本,但呈现类似TextView的界面？
Jua*_*tés 9 android text-alignment textview webview
我正在寻找一种简单的方法来忘记我正在使用a WebView来证明我的文本是合理的TextView.有人为此制作了自定义视图吗？我很清楚我可以这样做:
WebView view = new WebView(this);
view.loadData("my html with text justification","text/html","utf-8");
但是当你想要设置尺寸,颜色或其他常见属性时会变得很难看TextView.必须有一种更方便的方法.
Jua*_*tés 19
我承认,这让我神经紧张.我喜欢在代码中TextViews看起来像TextViews,即使我使用a WebView作为实现text-align:justified格式化的手段,我也不想那样看待它.
我创建了一个自定义视图(丑陋,可能很糟糕),它实现了我常用的方法,TextView并修改了WebView的内容以反映这些更改.对于其他人或我真正不知道的潜在危险它是有用的,对我来说它有效,我已经在几个项目中使用它并且没有遇到任何问题.唯一的小麻烦是我认为它是一个更大的收费记忆,但如果它只是一两个就没有什么可担心的(如果我错了,请纠正我).
结果如下:
以编程方式设置它的代码就像这样简单:
JustifiedTextView J = new JustifiedTextView();
J.setText("insert your text here");
当然,这样做是愚蠢的,所以我还添加了改变字体大小和字体颜色的方法,这些方法基本上都是我使用的TextViews.意思是我可以这样做:
JustifiedTextView J = new JustifiedTextView();
J.setText("insert your text here");
J.setTextColor(Color.RED);
J.setTextSize(30);
并获得以下结果(图像被裁剪):
但是,这不是向我们展示它的外观,而是分享你是如何做到的!
我知道我知道.这是完整的代码.它还解决了设置透明背景和将UTF-8字符串加载到视图中时的问题.有关详细信息,请参阅reloadData()中的注释.
public class JustifiedTextView extends WebView{
private String core = "<html><body style='text-align:justify;color:rgba(%s);font-size:%dpx;margin: 0px 0px 0px 0px;'>%s</body></html>";
private String textColor = "0,0,0,255";
private String text = "";
private int textSize = 12;
private int backgroundColor=Color.TRANSPARENT;
public JustifiedTextView(Context context, AttributeSet attrs) {
super(context, attrs);
this.setWebChromeClient(new WebChromeClient(){});
}
public void setText(String s){
this.text = s;
reloadData();
}
@SuppressLint("NewApi")
private void reloadData(){
// loadData(...) has a bug showing utf-8 correctly. That's why we need to set it first.
this.getSettings().setDefaultTextEncodingName("utf-8");
this.loadData(String.format(core,textColor,textSize,text), "text/html","utf-8");
// set WebView's background color *after* data was loaded.
super.setBackgroundColor(backgroundColor);
// Hardware rendering breaks background color to work as expected.
// Need to use software renderer in that case.
if(android.os.Build.VERSION.SDK_INT >= 11)
this.setLayerType(WebView.LAYER_TYPE_SOFTWARE, null);
}
public void setTextColor(int hex){
String h = Integer.toHexString(hex);
int a = Integer.parseInt(h.substring(0, 2),16);
int r = Integer.parseInt(h.substring(2, 4),16);
int g = Integer.parseInt(h.substring(4, 6),16);
int b = Integer.parseInt(h.substring(6, 8),16);
textColor = String.format("%d,%d,%d,%d", r, g, b, a);
reloadData();
}
public void setBackgroundColor(int hex){
backgroundColor = hex;
reloadData();
}
public void setTextSize(int textSize){
this.textSize = textSize;
reloadData();
}
}
- 是否可以将Textface设置为textview？谢谢 (2认同)
没有webview解决方案是:https://github.com/merterhk/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;
}
}
}
只需三个步骤,您就可以证明您的Web视图文本.
1)
// Justify tag
String justifyTag = "<html><body style='text-align:justify;'>%s</body></html>";
2)
// Concatenate your string with the tag to Justify it
String dataString = String.format(Locale.US, justifyTag, "my html with text justification");
3)
// Load the data in the web view
webView.loadDataWithBaseURL("", dataString, "text/html", "UTF-8", "");
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