android webview设置内容的字体大小_consider specifying the text size in scaled pixels-优快云博客

本文介绍了如何在Android WebView中管理文本的字体大小。通过WebSettings类提供的TextSize枚举，可以设置字体为SMALLEST（50%）、SMALLER（75%）、NORMAL（100%）、LARGER（150%）或LARGEST（200%）。通过监听按钮点击事件动态调整字体大小，实现用户友好的阅读体验。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

Enum for specifying the text size. SMALLEST is 50% SMALLER is 75% NORMAL is 100% LARGER is 150% LARGEST is 200%

/**
  * webview
  */
WebView wv;
/**
  * Manages settings state for a WebView
  */
WebSettings settings;
/**
  * 用来控制字体大小
  */
int fontSize = 1;

wv = (WebView) findViewById(R.id.webViewContent);
  settings = wv.getSettings();
  settings.setSupportZoom(true);

if (settings.getTextSize() == WebSettings.TextSize.SMALLEST) {
   fontSize = 1;
  } else if (settings.getTextSize() == WebSettings.TextSize.SMALLER) {
   fontSize = 2;
  } else if (settings.getTextSize() == WebSettings.TextSize.NORMAL) {
   fontSize = 3;
  } else if (settings.getTextSize() == WebSettings.TextSize.LARGER) {
   fontSize = 4;
  } else if (settings.getTextSize() == WebSettings.TextSize.LARGEST) {
   fontSize = 5;
  }

/**
     * 设置底部按钮的事件
     */
    private void setImageViewClick() {

        /**
         * 缩小按钮
         */
        imgViewSX.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                fontSize--;

                if (fontSize < 0) {
                    fontSize = 1;
                }
                switch (fontSize) {

                case 1:
                    settings.setTextSize(WebSettings.TextSize.SMALLEST);
                    break;
                case 2:
                    settings.setTextSize(WebSettings.TextSize.SMALLER);
                    break;
                case 3:
                    settings.setTextSize(WebSettings.TextSize.NORMAL);
                    break;
                case 4:
                    settings.setTextSize(WebSettings.TextSize.LARGER);
                    break;
                case 5:
                    settings.setTextSize(WebSettings.TextSize.LARGEST);
                    break;
                }

            }
        });

        /**
         * 放大按钮
         */
        imgViewFD.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                fontSize++;

                if (fontSize > 5) {
                    fontSize = 5;
                }
                switch (fontSize) {

                case 1:
                    settings.setTextSize(WebSettings.TextSize.SMALLEST);
                    break;
                case 2:
                    settings.setTextSize(WebSettings.TextSize.SMALLER);
                    break;
                case 3:
                    settings.setTextSize(WebSettings.TextSize.NORMAL);
                    break;
                case 4:
                    settings.setTextSize(WebSettings.TextSize.LARGER);
                    break;
                case 5:
                    settings.setTextSize(WebSettings.TextSize.LARGEST);
                    break;
                }
            }
        });

final String mimeType = "text/html";
        final String encoding = "UTF-8";

content = getContentFromNewWork(newsId);
wv.loadDataWithBaseURL("", content, mimeType, encoding, "");