webview无法从sd卡加载html文件 [英] webview cannot load html file from sd card

问题描述

我正在尝试从 SD 卡加载 html 文件.笔记:-> 如果我加载 http://www.google.com 就可以了.-> 文件存在-> 我有互联网和 WRITE_EXTERNAL_STORAGE 权限

I'm trying to load a html file from sd-card. Note: -> if i load http://www.google.com it works. -> the file exists -> i have permissions for internet and WRITE_EXTERNAL_STORAGE

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    addB = (Button) findViewById(R.id.add);
    webComp = (WebView) findViewById(R.id.webC);

    WebSettings webSettings = webComp.getSettings();
    webSettings.setJavaScriptEnabled(true);
    webSettings.setSupportZoom(false);
    webSettings.setAllowFileAccess(true);
    webSettings.setLoadsImagesAutomatically(true);
    webSettings.setSavePassword(false);
    webSettings.setSaveFormData(false);
    webSettings.setJavaScriptEnabled(true);        

    webComp.setWebViewClient(new HelloWebViewClient());                    



    webComp.loadUrl("/sdcard/FMS/1/message.html");            



}

谢谢！:)

推荐答案

Misca,

您不应该像那样硬编码 SD 卡的目录.它通常位于 /mnt/sdcard/ ，但这永远无法保证.您还应该始终检查 sdcard 是否存在并首先安装！

You shouldn't hard code the directory of the sdcard like that. Its typically at /mnt/sdcard/ but this is never assured. You should also always check if the sdcard exists and is mounted first!

您想使用以下内容:

if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
    Log.d(TAG, "No SDCARD");
} else {
    webComp.loadUrl("file://"+Environment.getExternalStorageDirectory()+"/FMS/1/message.html");
}

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