Justify text in textview-第2页回答

In my app first I have textview to show text. Then I want to justify text but in android its not possible to justify text in textview. To justify text I am taking help from this link. I am following the answer provided by @Kondzio but its not working. I dont know whats wrong in my code.

Code-

public class Benefits extends Activity{
    private Button back;
    LinearLayout bText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.benefits);
        WebView view = new WebView(this);
        view.setVerticalScrollBarEnabled(true);
        ((LinearLayout)findViewById(R.id.bText)).addView(view);
        view.loadData(getString(R.string.benef), "text/html", "utf-8");

        back.setOnClickListener(new View.OnClickListener(){
        public void onClick(View v)
        {
            finish();
        }
    });
  }
}

Xml-

<LinearLayout 
       android:id="@+id/bText"
       android:orientation="horizontal"
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content"
       android:layout_weight="4"
       android:gravity="center">            
 </LinearLayout>

In strings.xml-

<string name="benef">
        <![CDATA[
        <html>
        <head></head>
        <body style="text-align:justify;color:gray;background-color:black;">
         "1.some text\n
          2.some text\n
          .............
 </body>
</html>
]]>
</string>

I am setting scrollbarenabled to true to make vertical scrolling on my text.

标签： android scroll textview

7条回答

走好不送

2楼-- · 2019-01-22 05:38

import android.content.Context;
import android.graphics.Canvas;
import android.text.Layout;
import android.text.StaticLayout;
import android.text.TextPaint;
import android.util.AttributeSet;
import android.widget.TextView;


public class JustifyTextView extends TextView {

private int mLineY;
private int mViewWidth;

public JustifyTextView(Context context, AttributeSet attrs) {
    super(context, attrs);
}

@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
    super.onLayout(changed, left, top, right, bottom);
}

@Override
protected void onDraw(Canvas canvas) {
    TextPaint paint = getPaint();
    paint.setColor(getCurrentTextColor());
    paint.drawableState = getDrawableState();
    mViewWidth = getMeasuredWidth();
    String text = getText().toString();
    mLineY = 0;
    mLineY += getTextSize();
    Layout layout = getLayout();
    for (int i = 0; i < layout.getLineCount(); i++) {
        int lineStart = layout.getLineStart(i);
        int lineEnd = layout.getLineEnd(i);
        String line = text.substring(lineStart, lineEnd);

        float width = StaticLayout.getDesiredWidth(text, lineStart, lineEnd, getPaint());
        if (needScale(line,i)) {
            drawScaledText(canvas, lineStart, line, width);
        } else {
            canvas.drawText(line, 0, mLineY, paint);
        }

        mLineY += getLineHeight();
    }
}

private void drawScaledText(Canvas canvas, int lineStart, String line, float lineWidth) {
    float x = 0;
    if (isFirstLineOfParagraph(lineStart, line)) {
        String blanks = "  ";
        canvas.drawText(blanks, x, mLineY, getPaint());
        float bw = StaticLayout.getDesiredWidth(blanks, getPaint());
        x += bw;

        line = line.substring(3);
    }

    float d = (mViewWidth - lineWidth) / line.length() - 1;
    for (int i = 0; i < line.length(); i++) {
        String c = String.valueOf(line.charAt(i));
        float cw = StaticLayout.getDesiredWidth(c, getPaint());
        canvas.drawText(c, x, mLineY, getPaint());
        x += cw + d;
    }
}

private boolean isFirstLineOfParagraph(int lineStart, String line) {
    return line.length() > 3 && line.charAt(0) == ' ' && line.charAt(1) == ' ';
}

private boolean needScale(String line,int lineNumber) {
    Layout layout = getLayout();
    if (line.length() == 0 || layout.getLineCount() == 1 || lineNumber == (layout.getLineCount() - 1)) {
        return false;
    } else {
        return line.charAt(line.length() - 1) != '\n';
    }
}

}

I modified code given by Sasikumar to correct followings.

If lineCount() is 1, do not justify. (It was doing so)
if lastLine, do not justify it. (it was going beyond justification)

This is pure text only solution. Html does not work. no linebreak (\n) or any other character works. All spaces are removed. So its just for limited , pure text use.

0人赞添加讨论(0) 举报

上一页 1 2

Justify text in textview

采纳回答

编辑标签

举报内容

检举类型

检举原因

检举说明(必填)

打开微信“扫一扫”，打开网页后点击屏幕右上角分享按钮

付费偷看金额在0.1-10元之间