---

layout: post keywords: blog description: blog title: "Android WebView上传文件" categories: [Android] tags: [WebView]

---

{% include codepiano/setup %}

在这次食物上传功能的开发中，其中WebView中上传图片需要调用系统的文件系统，默认WebView是不支持文件上传的，需要自己手动配置一些东西，具体代码如下：

{% highlight ruby %} public class BrowserActivity extends Activity { private WebView mWebView; private ValueCallback mUploadMessage; private final static int FILECHOOSER_RESULTCODE = 1;

public void onCreate(Bundle outState) {
    super.onCreate(outState);
    setContentView(R.layout.activity_browser);
    mWebView = (WebView) findViewById(R.id.webview);
    mWebView.getSettings().setJavaScriptEnabled(true);
    mWebView.setWebChromeClient(new MyWebClient());
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    if (requestCode == FILECHOOSER_RESULTCODE) {
        if (null == mUploadMessage)
        return;
    Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();
    mUploadMessage.onReceiveValue(result);
    mUploadMessage = null;
    }
}

public class MyWebClient extends WebChromeClient {
    // For Android 3.0-
    public void openFileChooser(ValueCallback<Uri> uploadMsg) {
        mUploadMessage = uploadMsg;
        Intent i = new Intent(Intent.ACTION_GET_CONTENT);
        i.addCategory(Intent.CATEGORY_OPENABLE);
        i.setType("image/*");
        startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
    }

    // For Android 3.0+
    public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
        mUploadMessage = uploadMsg;
        Intent i = new Intent(Intent.ACTION_GET_CONTENT);
        i.addCategory(Intent.CATEGORY_OPENABLE);
        i.setType("*/*");
        startActivityForResult(Intent.createChooser(i, "File Browser"), FILECHOOSER_RESULTCODE);
    }

    // For Android 4.1
    public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
        mUploadMessage = uploadMsg;
        Intent i = new Intent(Intent.ACTION_GET_CONTENT);
        i.addCategory(Intent.CATEGORY_OPENABLE);
        i.setType("image/*");
        startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
    }
}

} {% endhighlight %}

主要就是自定义了WebChromeClient，然而测试时发现在4.4以上的Android版本依然不可以，搜了下openFileChooser方法在4.4以后不是public的，所以以后不建议这种直接在WebView上传文件的做法。

stackoverflow参考链接：HTML file input in android webview (android 4.4, kitkat)