android - 如何在android中设置webview的文本颜色

Question

我正在尝试使用此代码更改 webview 的文本颜色

String message ="<font color='white'>"+"<u>"+
"text in white"+ "<br>" +
"<font color='cyan'>"+"<font size='2'>"+
" text in blue color "+"</font>";
webview.loadData(message, "text/html", "utf8"); 

但我有一些 html 页面。存储在我的 SD 卡中然后我如何更改文本颜色..

我用

webViewRead.loadUrl(url);

url 是我文件的路径。

Answer 1

您必须像这样给出该文件的路径。

String extStorageDirectory = Environment.getExternalStorageDirectory()
                .toString() + "/folder_name";

File directory = new File(extStorageDirectory);
File fileInDirectory = new File(directory,file_name.html);

//Read text from file
StringBuilder html_text = new StringBuilder();

try {
    BufferedReader br = new BufferedReader(new FileReader(fileInDirectory));
    String line;

    while ((line = br.readLine()) != null) {
        html_text.append(line);
        html_text.append('\n');
    }
}
catch (IOException e) {
    //You'll need to add proper error handling here
}

然后使用此html代码进行编辑

String message ="<font color='white'>"+"<u>"+"text in white"+ "<br>" +"<font color='cyan'>"+"<font size='2'>"+" text in blue color "+"</font>"; 
 webview.loadData(message, "text/html", "utf8");