//初始化
FileChooserWebChromeClient fileChooserWebChromeClient;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    fileChooserWebChromeClient = FileChooserWebChromeClient.createBuild(new FileChooserWebChromeClient.ActivityCallBack() {
        @Override
        public void FileChooserBack(Intent intent) {
            startActivityForResult(intent, FILE_CHOOSER_RESULT_CODE);
        }
    });
	//设置到自己的webview
	webview.setWebChromeClient(webChromeClient);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == FILE_CHOOSER_RESULT_CODE) {
        fileChooserWebChromeClient.getUploadMessage().onActivityResult(requestCode,resultCode,data);
    }
}