Android webview,文件上传,在onActivityResult中设置结果时崩溃

Question

在Android webview中,单击文件上载选项时,将调用onShowFileChooser,以调用用户从图像库中选择要上载的文件的意图.选择文件后,在onActivityResult内部由于以下原因而崩溃

java.lang.IllegalStateException: Duplicate showFileChooser result
        at org.chromium.android_webview.AwWebContentsDelegateAdapter$2.onReceiveValue(AwWebContentsDelegateAdapter.java:225)
        at org.chromium.android_webview.AwWebContentsDelegateAdapter$2.onReceiveValue(AwWebContentsDelegateAdapter.java:220)
        at com.android.webview.chromium.WebViewContentsClientAdapter$4.onReceiveValue(WebViewContentsClientAdapter.java:1063)
        at com.android.webview.chromium.WebViewContentsClientAdapter$4.onReceiveValue(WebViewContentsClientAdapter.java:1047)

Answer 1

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

返回true

Answer 2

如果您重写onShowFileChooser并计划调用来filePathCallback传递结果，则必须返回 true，从而onShowFileChooser告诉底层代码不要将值传递给filePathCallback.

真正的基本上是说“我会处理它”

文档： @return true if filePathCallback will be invoked, false to use default handling.