Android与H5互调之AlerDialog的实现webView网页字体的大小

private void getData() {
    url = getIntent().getStringExtra("url");
    //设置支持javaScript
    webSettings = webview.getSettings();
    //设置支持javaScript
    webSettings.setJavaScriptEnabled(true);
    //设置算计变大变小
    webSettings.setUseWideViewPort(true);
    //设置缩放按钮
    webSettings.setBuiltInZoomControls(true);
    //不让从当前网页跳转到系统的浏览器中
    webview.setWebViewClient(new WebViewClient(){
        //单加载页面完成时调用
        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);

            pdLoading.setVisibility(View.GONE);
        }
    });

    webview.loadUrl(url);
}

private void getData() {
    url = getIntent().getStringExtra("url");
    //设置支持javaScript
    webSettings = webview.getSettings();
    //设置支持javaScript
    webSettings.setJavaScriptEnabled(true);
    //设置算计变大变小
    webSettings.setUseWideViewPort(true);
    //设置缩放按钮
    webSettings.setBuiltInZoomControls(true);
    //不让从当前网页跳转到系统的浏览器中
    webview.setWebViewClient(new WebViewClient(){
        //单加载页面完成时调用
        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);

            pdLoading.setVisibility(View.GONE);
        }
    });

    webview.loadUrl(url);
}


private void showChangeTextSizeDialog() {
    //设置Dialog
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("设置文字大小");
    String[] items = {"超大字体","大字体","正常字体","小字体","超小字体"};
    builder.setSingleChoiceItems(items,realSize,new DialogInterface.OnClickListener(){
        @Override
        public void onClick(DialogInterface dialog, int which) {
            tempSize = which;
        }
    });
    builder.setNegativeButton("取消",null);
    builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            realSize = tempSize;
            changeTextSize(realSize);
        }
    });
    builder.show();
}

private void changeTextSize(int realSize) {
    switch (realSize){
        case 0://超大字体
            webSettings.setTextZoom(200);
            break;
        case 1://大字体
            webSettings.setTextZoom(150);
            break;
        case 2://正常字体
            webSettings.setTextZoom(100);
            break;
        case 3://小字体
            webSettings.setTextZoom(75);
            break;
        case 4://超小字体
            webSettings.setTextZoom(50);
            break;
    }
}

本文地址：https://blog.csdn.net/weixin_42765222/article/details/107140925