我刚刚为自己的平台创建了一个简单的android应用（WebView）。在台式机和移动设备上的任何浏览器中都运行良好，但是我在android应用程序上遇到一个问题。
我有以下情况：
注销代码：
<li class="dropdown dropdown-notification nav-item">
<a class="nav-link nav-link-label" value="{{ csrf_token() }}" href="{{ url('/logout') }}" method="GET" onclick="event.preventDefault(); document.getElementById('logout-form').submit();"><font color="red"><i class="ficon ft-log-out"></i></font></a>
</li>
<form id="logout-form" action="{{ url('/logout') }}" method="POST" style="display: none;">
{{ csrf_field() }}
</form>
MainActivity.java代码：
package com.siteronics.domainame;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.net.ConnectivityManager;
import android.net.Uri;
import android.net.http.SslError;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.Message;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.animation.TranslateAnimation;
import android.webkit.ClientCertRequest;
import android.webkit.CookieManager;
import android.webkit.CookieSyncManager;
import android.webkit.HttpAuthHandler;
import android.webkit.RenderProcessGoneDetail;
import android.webkit.SslErrorHandler;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebResourceError;
import android.webkit.WebResourceRequest;
import android.webkit.WebResourceResponse;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.LinearLayout;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.app.ProgressDialog;
import android.os.Parcelable;
import android.provider.MediaStore;
import android.webkit.ConsoleMessage;
import android.widget.Toast;
import cn.pedant.SweetAlert.SweetAlertDialog;
public class MainActivity extends AppCompatActivity {
WebView webView;
private static final String TAG = MainActivity.class.getSimpleName();
private String mCM;
private ValueCallback mUM;
private ValueCallback<Uri[]> mUMA;
private final static int FCR=1;
SweetAlertDialog sweetAlertDialog;
//select whether you want to upload multiple files
private boolean multiple_files = false;
String URL="https://domainame.com/login";
// private AdView mAdView;
// AdRequest adRequest;
LinearLayout linearLayout;
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent){
super.onActivityResult(requestCode, resultCode, intent);
if(Build.VERSION.SDK_INT >= 21){
Uri[] results = null;
//Check if response is positive
if(resultCode== Activity.RESULT_OK){
if(requestCode == FCR){
if(null == mUMA){
return;
}
if(intent == null || intent.getData() == null){
//Capture Photo if no image available
if(mCM != null){
results = new Uri[]{Uri.parse(mCM)};
}
}else{
String dataString = intent.getDataString();
if(dataString != null){
results = new Uri[]{Uri.parse(dataString)};
} else {
if(multiple_files) {
if (intent.getClipData() != null) {
final int numSelectedFiles = intent.getClipData().getItemCount();
results = new Uri[numSelectedFiles];
for (int i = 0; i < numSelectedFiles; i++) {
results[i] = intent.getClipData().getItemAt(i).getUri();
}
}
}
}
}
}
}
mUMA.onReceiveValue(results);
mUMA = null;
}else{
if(requestCode == FCR){
if(null == mUM) return;
Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();
mUM.onReceiveValue(result);
mUM = null;
}
}
}
@SuppressLint({"SetJavaScriptEnabled", "WrongViewCast"})
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
if(getResources().getBoolean(R.bool.portrait_only)){
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
else{
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}
Log.e("tag","onCreate");
setContentView(R.layout.activity_main);
// Sample AdMob app ID: ca-app-pub-3940256099942544~3347511713
// MobileAds.initialize(this, "ca-app-pub-3940256099942544~3347511713");
// MobileAds.initialize(this, "ca-app-pub-8239779269277913~8610652498");
sweetAlertDialog=new SweetAlertDialog(this,SweetAlertDialog.ERROR_TYPE);
linearLayout=findViewById(R.id.ll_splash);
// mAdView = findViewById(R.id.adView);
final TranslateAnimation animate = new TranslateAnimation(0,-linearLayout.getWidth(),0,0);
animate.setDuration(500);
animate.setFillAfter(true);
webView = (WebView) findViewById(R.id.a);
assert webView != null;
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setAllowFileAccess(true);
webSettings.setAppCacheEnabled(true);
webSettings.setAllowContentAccess(true);
webSettings.setDatabaseEnabled(true);
webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
//improve webView performance
webView.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH);
webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
webView.getSettings().setAppCacheEnabled(true);
webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
webSettings.setDomStorageEnabled(true);
webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
webSettings.setUseWideViewPort(true);
webSettings.setSavePassword(true);
webSettings.setSaveFormData(true);
webSettings.setEnableSmoothTransition(true);
// webSettings.setDomStorageEnabled(true);
if(Build.VERSION.SDK_INT >= 21){
webSettings.setMixedContentMode(0);
webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
}else if(Build.VERSION.SDK_INT >= 19){
webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
}else {
webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
webView.setWebChromeClient(new WebChromeClient());
CookieSyncManager.createInstance(MainActivity.this);
CookieSyncManager.getInstance().startSync();
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.setAcceptCookie(true);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
CookieManager.getInstance().setAcceptThirdPartyCookies(webView, true);
}
webView.loadUrl(URL);
webView.setWebChromeClient(new WebChromeClient(){
//For Android 5.0+
public boolean onShowFileChooser(
WebView webView, ValueCallback<Uri[]> filePathCallback,
FileChooserParams fileChooserParams){
if(mUMA != null){
mUMA.onReceiveValue(null);
}
mUMA = filePathCallback;
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if(takePictureIntent.resolveActivity(MainActivity.this.getPackageManager()) != null){
File photoFile = null;
try{
photoFile = createImageFile();
takePictureIntent.putExtra("PhotoPath", mCM);
}catch(IOException ex){
Log.e(TAG, "Image file creation failed", ex);
}
if(photoFile != null){
mCM = "file:" + photoFile.getAbsolutePath();
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
}else{
takePictureIntent = null;
}
}
Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);
contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);
contentSelectionIntent.setType("*/*");
if(multiple_files) {
contentSelectionIntent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, false);
// contentSelectionIntent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
}
Intent[] intentArray;
if(takePictureIntent != null){
intentArray = new Intent[]{takePictureIntent};
}else{
intentArray = new Intent[0];
}
Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);
chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);
chooserIntent.putExtra(Intent.EXTRA_TITLE, "Image Chooser");
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray);
if(multiple_files && Build.VERSION.SDK_INT >= 18) {
chooserIntent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
}
startActivityForResult(chooserIntent, FCR);
return true;
}
});
webView.setWebViewClient(new WebViewClient(){
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
if (!isNetworkConnected()) {
new SweetAlertDialog(MainActivity.this, SweetAlertDialog.ERROR_TYPE)
.setTitleText("Error...")
.setContentText("No internet connection!")
.setConfirmText("Retry")
.setConfirmClickListener(new SweetAlertDialog.OnSweetClickListener() {
@Override
public void onClick(SweetAlertDialog sDialog) {
sDialog.dismissWithAnimation();
webView.reload();
}
})
.show();
webView.stopLoading();
return;
}
Log.e("tag","onPageStarted");
sweetAlertDialog =new SweetAlertDialog(MainActivity.this,SweetAlertDialog.PROGRESS_TYPE);
sweetAlertDialog.setCancelable(false);
sweetAlertDialog.setTitle("Loading....");
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
else
if (linearLayout.getVisibility()==View.GONE)
sweetAlertDialog.show();
Log.e("tag","onPageStarted");
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
//linearLayout.startAnimation(animate);
Log.e("tag","onPageFinished");
linearLayout.setVisibility(View.GONE);
// adRequest = new AdRequest.Builder().build();
// mAdView.loadAd(adRequest);
// mAdView.setVisibility(View.VISIBLE);
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
}
@Override
public void onLoadResource(WebView view, String url) {
// if (sweetAlertDialog.isShowing()){
// sweetAlertDialog.dismiss();
// }
super.onLoadResource(view, url);
Log.e("tag","onLoadResource");
}
@Override
public void onReceivedHttpError(WebView view, WebResourceRequest request, WebResourceResponse errorResponse) {
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
super.onReceivedHttpError(view, request, errorResponse);
Log.e("tag","onReceivedHttpError");
}
@Override
public void doUpdateVisitedHistory(WebView view, String url, boolean isReload) {
// if (sweetAlertDialog.isShowing()){
// sweetAlertDialog.dismiss();
// }
super.doUpdateVisitedHistory(view, url, isReload);
Log.e("tag","doUpdateVisitedHistory");
}
@Override
public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
super.onReceivedSslError(view, handler, error);
Log.e("tag","onReceivedSslError");
}
@Override
public void onReceivedClientCertRequest(WebView view, ClientCertRequest request) {
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
super.onReceivedClientCertRequest(view, request);
Log.e("tag","onReceivedClientCertRequest");
}
@Override
public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
super.onReceivedHttpAuthRequest(view, handler, host, realm);
Log.e("tag","onReceivedHttpAuthRequest");
}
@Override
public boolean shouldOverrideKeyEvent(WebView view, KeyEvent event) {
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
Log.e("tag","shouldOverrideKeyEvent");
return super.shouldOverrideKeyEvent(view, event);
}
@Override
public void onUnhandledKeyEvent(WebView view, KeyEvent event) {
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
super.onUnhandledKeyEvent(view, event);
Log.e("tag","onUnhandledKeyEvent");
}
@Override
public void onScaleChanged(WebView view, float oldScale, float newScale) {
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
super.onScaleChanged(view, oldScale, newScale);
Log.e("tag","onScaleChanged");
}
@Override
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
new SweetAlertDialog(MainActivity.this, SweetAlertDialog.ERROR_TYPE)
.setTitleText("Error...")
.setContentText("No internet connection!")
.setConfirmText("Retry")
.setConfirmClickListener(new SweetAlertDialog.OnSweetClickListener() {
@Override
public void onClick(SweetAlertDialog sDialog) {
sDialog.dismissWithAnimation();
webView.reload();
}
})
.show();
Log.e("tag","onReceivedError");
}
@Override
public void onPageCommitVisible(WebView view, String url) {
super.onPageCommitVisible(view, url);
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
Log.e("tag","onPageCommitVisible");
}
@Override
public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
super.onReceivedError(view, request, error);
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
Log.e("tag","onReceivedError");
}
@Override
public void onFormResubmission(WebView view, Message dontResend, Message resend) {
super.onFormResubmission(view, dontResend, resend);
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
Log.e("tag","onFormResubmission");
}
@Override
public void onReceivedLoginRequest(WebView view, String realm, String account, String args) {
super.onReceivedLoginRequest(view, realm, account, args);
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
Log.e("tag","onReceivedLoginRequest");
}
@Override
public boolean onRenderProcessGone(WebView view, RenderProcessGoneDetail detail) {
Log.e("tag","onRenderProcessGone");
return super.onRenderProcessGone(view, detail);
// if (sweetAlertDialog.isShowing()){
// sweetAlertDialog.dismiss();
// }
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
Log.e("tag","shouldOverrideUrlLoading");
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
view.loadUrl(request.getUrl().toString());
}
return super.shouldOverrideUrlLoading(view, request);
}
});
}
@Override
public boolean onKeyDown(int keyCode, @NonNull KeyEvent event){
Log.e("tag","onKeyDown");
if(event.getAction() == KeyEvent.ACTION_DOWN){
switch(keyCode){
case KeyEvent.KEYCODE_BACK:
if(webView.canGoBack()){
webView.goBack();
}else{
finish();
}
return true;
}
}
return super.onKeyDown(keyCode, event);
}
@Override
public void onConfigurationChanged(Configuration newConfig){
super.onConfigurationChanged(newConfig);
}
private boolean isNetworkConnected() {
Log.e("tag","isNetworkConnected");
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
return cm.getActiveNetworkInfo() != null;
}
@Override
protected void onRestart() {
Log.e("tag","onRestart");
super.onRestart();
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
}
@Override
protected void onPostResume() {
Log.e("tag","onPostResume");
super.onPostResume();
if (sweetAlertDialog.isShowing()){
sweetAlertDialog.dismiss();
}
}
@Override
public void onBackPressed() {
Log.e("tag","onBackPressed");
super.onBackPressed();
finish();
}
@Override
protected void onDestroy() {
Log.e("tag","onDestroy");
super.onDestroy();
webView=null;
}
// Create an image file
private File createImageFile() throws IOException{
@SuppressLint("SimpleDateFormat") String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "img_"+timeStamp+"_";
File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
return File.createTempFile(imageFileName,".jpg",storageDir);
}
}
在/ resources / views / errors上，我试图用html meta redirect修改419.blade.php，但问题未解决。
我想让我的客户长时间登录到仪表板，但同时也希望他们可以在他们希望的时候注销而不会出现任何问题。
答案 0 :(得分：0)
您应该删除此行：
webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
并使用：
webView.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT);