package com.testandroid.webview;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.view.KeyEvent;import android.view.View;import android.webkit.JsResult;import android.webkit.ValueCallback;import android.webkit.WebBackForwardList;import android.webkit.WebChromeClient;import android.webkit.WebView;import android.webkit.WebViewClient;import android.widget.Button;import com.testandroid.R;public class WebViewActivity extends AppCompatActivity {   private final String TAG = WebViewActivity.class.getSimpleName();  private Button button;  private WebView webView;  private String recgPic = "http://m.shitu.chinaso.com/mx/index.html";  public final static int FILECHOOSER_RESULTCODE = 1;  public final static int FILECHOOSER_RESULTCODE_FOR_ANDROID_5 = 2;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_web_view);    button = (Button) findViewById(R.id.button);    button.setOnClickListener(new View.OnClickListener() {      @Override      public void onClick(View v) {      }    });    initTestWebView();  }  private void initTestWebView() {    webView = (WebView) findViewById(R.id.tempWebView);    WiewSettings settings = webView.getSettings();    settings.setJavaScriptEnabled(true);    webView.setWebChromeClient(new WebChromeClient() {      @Override      public boolean onJsAlert(WebView view, String url, String message, JsResult result) {        AlertDialog.Builder builder = new AlertDialog.Builder(view.getContext());        builder.setTitle("xxx提示").setMessage(message).setPositiveButton("確定", null);        builder.setCancelable(false);        builder.setIcon(R.mipmap.ic_launcher);        AlertDialog dialog = builder.create();        dialog.show();        result.confirm();        return true;      }      //擴展瀏覽器上傳文件      //3.0++版本      public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {        openFileChooserImpl(uploadMsg);      }      //3.0--版本      public void openFileChooser(ValueCallback<Uri> uploadMsg) {        openFileChooserImpl(uploadMsg);      }      public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {        openFileChooserImpl(uploadMsg);      }      @Override      public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {        onenFileChooseImpleForAndroid(filePathCallback);        return true;      }    });    webView.setWebViewClient(new WebViewClient() {      @Override      public boolean shouldOverrideUrlLoading(WebView view, String url) {        view.loadUrl(url);        return true;      }    });    webView.loadUrl(recgPic);  }  public ValueCallback<Uri> mUploadMessage;  private void openFileChooserImpl(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);  }  public ValueCallback<Uri[]> mUploadMessageForAndroid5;  private void onenFileChooseImpleForAndroid(ValueCallback<Uri[]> filePathCallback) {    mUploadMessageForAndroid5 = filePathCallback;    Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);    contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);    contentSelectionIntent.setType("image/*");    Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);    chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);    chooserIntent.putExtra(Intent.EXTRA_TITLE, "Image Chooser");    startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE_FOR_ANDROID_5);  }  @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;    } else if (requestCode == FILECHOOSER_RESULTCODE_FOR_ANDROID_5){      if (null == mUploadMessageForAndroid5)        return;      Uri result = (intent == null || resultCode != RESULT_OK) ? null: intent.getData();      if (result != null) {        mUploadMessageForAndroid5.onReceiveValue(new Uri[]{result});      } else {        mUploadMessageForAndroid5.onReceiveValue(new Uri[]{});      }      mUploadMessageForAndroid5 = null;    }  }  @Override  public boolean onKeyDown(int keyCode, KeyEvent event) {    if (webView.canGoBack() && event.getKeyCode() == KeyEvent.KEYCODE_BACK) {      //獲取歷史列表      WebBackForwardList mWebBackForwardList = webView          .copyBackForwardList();      //判斷當前歷史列表是否最頂端,其實canGoBack已經判斷過      if (mWebBackForwardList.getCurrentIndex() > 0) {        webView.goBack();        return true;      }    }    return super.onKeyDown(keyCode, event);  }}