选择文件不能使用webview在手机上工作

Question

我有一个button选择网站中的文件，当你按下计算机上的按钮它的工作原理，当你按下手机上的按钮不起作用的解决方案，网站显示使用WebView

        mywebsite = (WebView)findViewById(R.id.mywebsite);
        pd_loading = (ProgressBar)findViewById(R.id.pd_loading);
        mywebsite.getSettings().setLoadsImagesAutomatically(true);
        mywebsite.getSettings().setJavaScriptEnabled(true);


        mywebsite.setWebViewClient(new WebViewClient());
        mywebsite.loadUrl(Information.URL_Home);
        mywebsite.setWebViewClient(new WebViewClient(){

            public void onPageFinished(WebView view ,String url)
            {
                pd_loading.setVisibility(View.GONE);
                mywebsite.setVisibility(View.VISIBLE);
            }

            @Override
            public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
                Toasty.error(Home.this,"",Toast.LENGTH_SHORT,true).show();
            }

            public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {

                Intent i = new Intent(Intent.ACTION_GET_CONTENT);
                i.addCategory(Intent.CATEGORY_OPENABLE);
                i.setType("image/*");
                startActivityForResult(Intent.createChooser(i, "File Chooser"), 101);
                mUploadMessage = uploadMsg;
            }

            // For Android > 4.1 - undocumented method
            @SuppressWarnings("unused")
            public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
                openFileChooser(uploadMsg, "");

            }

            // For Android > 5.0
            @TargetApi(Build.VERSION_CODES.LOLLIPOP)
            public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {

                startActivityForResult(fileChooserParams.createIntent(), 101);
                return true;
            }

        });

onActivityResult

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        switch (requestCode) {
            case 101:
                if (resultCode == RESULT_OK) {

                    Uri result = intent == null || resultCode != RESULT_OK ? null
                            : intent.getData();
                    if (mUploadMessage != null) {
                        mUploadMessage.onReceiveValue(result);
                    } else if (afterLolipop != null) {

                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                            afterLolipop.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, intent));
                            afterLolipop = null;
                        }
                    }
                    mUploadMessage = null;
                }
        }

    }

这些代码不起作用我只想选择一台电脑的图片，希望对我有所帮助

Answer 1

当我遇到类似的问题时，我已经使用了从setWebChromeClient()找到的this souce方法。

import android.app.AlertDialog;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.webkit.JavascriptInterface;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
import android.widget.Toast;
import org.apache.http.util.EncodingUtils;

public class BrowserScreen extends Activity {

    private WebView webView;
    private String url = "url";


    private ValueCallback<Uri> mUploadMessage;
    private final static int FILECHOOSER_RESULTCODE = 1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.browser_activity);
        initFields();
        setListeners();


    }




    public void initFields() {
        // TODO Auto-generated method stub

        webView = (WebView) findViewById(R.id.webView1);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.getSettings().setBuiltInZoomControls(true);
        webView.getSettings().setAllowFileAccess(true);
    }


    public void setListeners() {
        // TODO Auto-generated method stub

        webView.setWebViewClient(new WebViewClient() {
            public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {

                webView.loadUrl("about:blank");

                view.clearHistory();
            }


        });

        webView.setWebChromeClient(new WebChromeClient() {
            public void onProgressChanged(WebView view, int progress) {


            }

            //The undocumented magic method override
            //Eclipse will swear at you if you try to put @Override here
            // 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 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);

            }


        });



            webView.loadUrl(url);


        final MyJavaScriptInterface myJavaScriptInterface
                = new MyJavaScriptInterface(this);
        webView.addJavascriptInterface(myJavaScriptInterface, "AndroidFunction");
    }


    @Override
    public void onBackPressed() {
        // TODO Auto-generated method stub

        if (webView.canGoBack() == true) {
            webView.goBack();
        } else {
            super.onBackPressed();
        }
    }


    public class MyJavaScriptInterface {
        Context mContext;

        MyJavaScriptInterface(Context c) {
            mContext = c;
        }

        @JavascriptInterface
        public void showToast(String toast) {
            Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();
            // webView.loadUrl("javascript:document.getElementById(\"Button3\").innerHTML = \"bye\";");
        }

        @JavascriptInterface
        public void openAndroidDialog() {
            AlertDialog.Builder myDialog
                    = new AlertDialog.Builder(BrowserScreen.this);
            myDialog.setTitle("DANGER!");
            myDialog.setMessage("You can do what you want!");
            myDialog.setPositiveButton("ON", null);
            myDialog.show();
        }

    }


    @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;
        }
    }
}