Android WebView 網頁實現選擇文件

通常網頁上都會有選擇文件上傳按鈕 代碼爲 < input type=”file” />

要順利的打開本地文件夾，就要重新寫openFileChooser，然後再研究中發現openFileChooser是隱藏的一個方法，不能繼承重寫。

如下是解決方案：

1、

2、new 一個WebChromeClient，重新實現 openFileChooser方法

webView.setWebChromeClient(new WebChromeClient()
{
    public void openFileChooser(ValueCallback<Uri> filePathCallback)
    {
        mFilePathCallback4 = filePathCallback;
        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        intent.setType("*/*");
        startActivityForResult(Intent.createChooser(intent, "File Chooser"), REQUEST_FILE_PICKER);
    }

    public void openFileChooser(ValueCallback filePathCallback, String acceptType)
    {
        mFilePathCallback4 = filePathCallback;
        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        intent.setType("*/*");
        startActivityForResult(Intent.createChooser(intent, "File Chooser"), REQUEST_FILE_PICKER);
    }

    public void openFileChooser(ValueCallback<Uri> filePathCallback, String acceptType, String capture)
    {
        mFilePathCallback4 = filePathCallback;
        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        intent.setType("*/*");
        startActivityForResult(Intent.createChooser(intent, "File Chooser"), REQUEST_FILE_PICKER);
    }

    @Override
    public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams)
    {
        mFilePathCallback5 = filePathCallback;
        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        intent.setType("*/*");
        startActivityForResult(Intent.createChooser(intent, "File Chooser"), REQUEST_FILE_PICKER);
        return true;
    }
});

3、設置回調

private static final int REQUEST_FILE_PICKER = 1;
private ValueCallback<Uri> mFilePathCallback4;
private ValueCallback<Uri[]> mFilePathCallback5;

@Override
public void onActivityResult(int requestCode, int resultCode, Intent intent)
{
    if(requestCode==REQUEST_FILE_PICKER)
    {
        if(mFilePathCallback4!=null)
        {
            Uri result = intent==null || resultCode!=Activity.RESULT_OK ? null : intent.getData();
            if(result!=null)
            {
                String path = MediaUtility.getPath(getActivity(), result);
                Uri uri = Uri.fromFile(new File(path));
                mFilePathCallback4.onReceiveValue(uri);
            }
            else
            {
                mFilePathCallback4.onReceiveValue(null);
            }
        }
        if(mFilePathCallback5!=null)
        {
            Uri result = intent==null || resultCode!=Activity.RESULT_OK ? null : intent.getData();
            if(result!=null)
            {
                String path = MediaUtility.getPath(getActivity(), result);
                Uri uri = Uri.fromFile(new File(path));
                mFilePathCallback5.onReceiveValue(new Uri[]{ uri });
            }
            else
            {
                mFilePathCallback5.onReceiveValue(null);
            }
        }

        mFilePathCallback4 = null;
        mFilePathCallback5 = null;
    }
}