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Я просто не могу заставить мое приложение работать. Когда я открываю его на своем телефоне, экран белый. У меня нет ошибок при очистке или создании подписанного apk.Android Studio: я просто не могу заставить свое приложение работать - пустой экран
Я вернулся и вернул все свои изменения (я думаю, довольно уверен) до такой степени, что я работал.
Если кто-то может смотреть через мой код и скажите мне, что случилось, что было бы удивительным:
Спасибо за помощь! :)
Вот код, который я редактировал.
MainFragment.java
package com.thesgn.app.fragment;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.net.MailTo;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.widget.SwipeRefreshLayout;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import com.thesgn.app.R;
import com.thesgn.app.WebViewAppConfig;
import com.thesgn.app.utility.DownloadUtility;
import com.thesgn.app.utility.Logcat;
import com.thesgn.app.utility.MediaUtility;
import com.thesgn.app.utility.NetworkManager;
import com.thesgn.app.view.ViewState;
import java.io.File;
public class MainFragment extends TaskFragment implements SwipeRefreshLayout.OnRefreshListener
{
private static final String ARGUMENT_URL = "url";
private static final String ARGUMENT_SHARE = "share";
private static final int REQUEST_FILE_PICKER = 1;
private boolean mActionBarProgress = false;
private ViewState mViewState = null;
private View mRootView;
private String mUrl = "about:blank";
private String mShare;
private boolean mLocal = false;
private ValueCallback<Uri> mFilePathCallback4;
private ValueCallback<Uri[]> mFilePathCallback5;
public static MainFragment newInstance(String url, String share)
{
MainFragment fragment = new MainFragment();
// arguments
Bundle arguments = new Bundle();
arguments.putString(ARGUMENT_URL, url);
arguments.putString(ARGUMENT_SHARE, share);
fragment.setArguments(arguments);
return fragment;
}
@Override
public void onAttach(Activity activity)
{
super.onAttach(activity);
}
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
setRetainInstance(true);
// handle fragment arguments
Bundle arguments = getArguments();
if(arguments != null)
{
handleArguments(arguments);
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
mRootView = inflater.inflate(R.layout.fragment_main, container, false);
return mRootView;
}
@Override
public void onActivityCreated(Bundle savedInstanceState)
{
super.onActivityCreated(savedInstanceState);
// restore webview state
if(savedInstanceState!=null)
{
WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
webView.restoreState(savedInstanceState);
}
// setup webview
renderView();
// pull to refresh
SwipeRefreshLayout swipeRefreshLayout = (SwipeRefreshLayout) mRootView.findViewById(R.id.container_swipe_refresh);
swipeRefreshLayout.setOnRefreshListener(this);
// load and show data
if(mViewState==null || mViewState==ViewState.OFFLINE)
{
loadData();
}
else if(mViewState==ViewState.CONTENT)
{
showContent();
}
else if(mViewState==ViewState.PROGRESS)
{
showProgress();
}
else if(mViewState==ViewState.EMPTY)
{
showEmpty();
}
// progress in action bar
showActionBarProgress(mActionBarProgress);
}
@Override
public void onStart()
{
super.onStart();
}
@Override
public void onResume()
{
super.onResume();
}
@Override
public void onPause()
{
super.onPause();
}
@Override
public void onStop()
{
super.onStop();
}
@Override
public void onDestroyView()
{
super.onDestroyView();
mRootView = null;
}
@Override
public void onDestroy()
{
super.onDestroy();
}
@Override
public void onDetach()
{
super.onDetach();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent intent)
{
if(requestCode==REQUEST_FILE_PICKER)
{
if(mFilePathCallback4!=null)
{
Uri result = intent==null || resultCode!=Activity.RESULT_OK ? null : intent.getData();
if(result!=null)
{
String path = MediaUtility.getPath(getActivity(), result);
Uri uri = Uri.fromFile(new File(path));
mFilePathCallback4.onReceiveValue(uri);
}
else
{
mFilePathCallback4.onReceiveValue(null);
}
}
if(mFilePathCallback5!=null)
{
Uri result = intent==null || resultCode!=Activity.RESULT_OK ? null : intent.getData();
if(result!=null)
{
String path = MediaUtility.getPath(getActivity(), result);
Uri uri = Uri.fromFile(new File(path));
mFilePathCallback5.onReceiveValue(new Uri[]{ uri });
}
else
{
mFilePathCallback5.onReceiveValue(null);
}
}
mFilePathCallback4 = null;
mFilePathCallback5 = null;
}
}
@Override
public void onSaveInstanceState(Bundle outState)
{
// save current instance state
super.onSaveInstanceState(outState);
setUserVisibleHint(true);
// save webview state
WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
webView.saveState(outState);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater)
{
// action bar menu
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.menu_main, menu);
// show or hide share button
MenuItem share = menu.findItem(R.id.menu_share);
share.setVisible(mShare!=null && !mShare.trim().equals(""));
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
// action bar menu behaviour
switch(item.getItemId())
{
case R.id.menu_share:
startShareActivity(getString(R.string.app_name), mShare);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public void onRefresh()
{
runTaskCallback(new Runnable()
{
@Override
public void run()
{
refreshData();
}
});
}
private void handleArguments(Bundle arguments)
{
if(arguments.containsKey(ARGUMENT_URL))
{
mUrl = arguments.getString(ARGUMENT_URL);
mLocal = mUrl.contains("file://");
}
if(arguments.containsKey(ARGUMENT_SHARE))
{
mShare = arguments.getString(ARGUMENT_SHARE);
}
}
private void loadData()
{
if(NetworkManager.isOnline(getActivity()) || mLocal)
{
// show progress
showProgress();
// load web url
WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
webView.loadUrl(mUrl);
}
else
{
showOffline();
}
}
public void refreshData()
{
if(NetworkManager.isOnline(getActivity()) || mLocal)
{
// show progress in action bar
showActionBarProgress(true);
// load web url
WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
webView.loadUrl(webView.getUrl());
}
else
{
showActionBarProgress(false);
Toast.makeText(getActivity(), R.string.global_offline_toast, Toast.LENGTH_LONG).show();
}
}
private void showActionBarProgress(boolean visible)
{
// show pull to refresh progress bar
SwipeRefreshLayout swipeRefreshLayout = (SwipeRefreshLayout) mRootView.findViewById(R.id.container_swipe_refresh);
swipeRefreshLayout.setRefreshing(visible);
swipeRefreshLayout.setEnabled(!visible);
mActionBarProgress = visible;
}
private void showContent()
{
// show content container
ViewGroup containerContent = (ViewGroup) mRootView.findViewById(R.id.container_content);
ViewGroup containerProgress = (ViewGroup) mRootView.findViewById(R.id.container_progress);
ViewGroup containerOffline = (ViewGroup) mRootView.findViewById(R.id.container_offline);
ViewGroup containerEmpty = (ViewGroup) mRootView.findViewById(R.id.container_empty);
containerContent.setVisibility(View.VISIBLE);
containerProgress.setVisibility(View.GONE);
containerOffline.setVisibility(View.GONE);
containerEmpty.setVisibility(View.GONE);
mViewState = ViewState.CONTENT;
}
private void showContent(final long delay)
{
final Handler timerHandler = new Handler();
final Runnable timerRunnable = new Runnable()
{
@Override
public void run()
{
runTaskCallback(new Runnable()
{
public void run()
{
if(getActivity()!=null && mRootView!=null)
{
Logcat.d("Fragment.timerRunnable()");
showContent();
}
}
});
}
};
timerHandler.postDelayed(timerRunnable, delay);
}
private void showProgress()
{
// show progress container
ViewGroup containerContent = (ViewGroup) mRootView.findViewById(R.id.container_content);
ViewGroup containerProgress = (ViewGroup) mRootView.findViewById(R.id.container_progress);
ViewGroup containerOffline = (ViewGroup) mRootView.findViewById(R.id.container_offline);
ViewGroup containerEmpty = (ViewGroup) mRootView.findViewById(R.id.container_empty);
containerContent.setVisibility(View.GONE);
containerProgress.setVisibility(View.VISIBLE);
containerOffline.setVisibility(View.GONE);
containerEmpty.setVisibility(View.GONE);
mViewState = ViewState.PROGRESS;
}
private void showOffline()
{
// show offline container
ViewGroup containerContent = (ViewGroup) mRootView.findViewById(R.id.container_content);
ViewGroup containerProgress = (ViewGroup) mRootView.findViewById(R.id.container_progress);
ViewGroup containerOffline = (ViewGroup) mRootView.findViewById(R.id.container_offline);
ViewGroup containerEmpty = (ViewGroup) mRootView.findViewById(R.id.container_empty);
containerContent.setVisibility(View.GONE);
containerProgress.setVisibility(View.GONE);
containerOffline.setVisibility(View.VISIBLE);
containerEmpty.setVisibility(View.GONE);
mViewState = ViewState.OFFLINE;
}
private void showEmpty()
{
// show empty container
ViewGroup containerContent = (ViewGroup) mRootView.findViewById(R.id.container_content);
ViewGroup containerProgress = (ViewGroup) mRootView.findViewById(R.id.container_progress);
ViewGroup containerOffline = (ViewGroup) mRootView.findViewById(R.id.container_offline);
ViewGroup containerEmpty = (ViewGroup) mRootView.findViewById(R.id.container_empty);
containerContent.setVisibility(View.GONE);
containerProgress.setVisibility(View.GONE);
containerOffline.setVisibility(View.GONE);
containerEmpty.setVisibility(View.VISIBLE);
mViewState = ViewState.EMPTY;
}
private void renderView()
{
// reference
final WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
final AdView adView = (AdView) mRootView.findViewById(R.id.fragment_main_adview);
// webview settings
webView.getSettings().setBuiltInZoomControls(false);
webView.getSettings().setSupportZoom(true);
webView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
webView.getSettings().setJavaScriptEnabled(true);
webView.setBackgroundColor(getResources().getColor(R.color.global_bg_front));
webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY); // fixes scrollbar on Froyo
webView.setWebChromeClient(new WebChromeClient()
{
public void openFileChooser(ValueCallback<Uri> filePathCallback)
{
mFilePathCallback4 = filePathCallback;
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("*/*");
startActivityForResult(Intent.createChooser(intent, "File Chooser"), REQUEST_FILE_PICKER);
}
public void openFileChooser(ValueCallback filePathCallback, String acceptType)
{
mFilePathCallback4 = filePathCallback;
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("*/*");
startActivityForResult(Intent.createChooser(intent, "File Chooser"), REQUEST_FILE_PICKER);
}
public void openFileChooser(ValueCallback<Uri> filePathCallback, String acceptType, String capture)
{
mFilePathCallback4 = filePathCallback;
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("*/*");
startActivityForResult(Intent.createChooser(intent, "File Chooser"), REQUEST_FILE_PICKER);
}
@Override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams)
{
mFilePathCallback5 = filePathCallback;
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("*/*");
startActivityForResult(Intent.createChooser(intent, "File Chooser"), REQUEST_FILE_PICKER);
return true;
}
});
webView.setWebViewClient(new WebViewClient()
{
private boolean mSuccess = true;
@Override
public void onPageFinished(final WebView view, final String url)
{
runTaskCallback(new Runnable()
{
public void run()
{
if(getActivity()!=null && mSuccess)
{
showContent(500); // hide progress bar with delay to show webview content smoothly
showActionBarProgress(false);
}
}
});
}
@Override
public void onReceivedError(final WebView view, final int errorCode, final String description, final String failingUrl)
{
runTaskCallback(new Runnable()
{
public void run()
{
if(getActivity()!=null)
{
mSuccess = false;
showEmpty();
showActionBarProgress(false);
}
}
});
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
if(DownloadUtility.isDownloadableFile(url))
{
Toast.makeText(getActivity(), R.string.fragment_main_downloading, Toast.LENGTH_LONG).show();
DownloadUtility.downloadFile(getActivity(), url, DownloadUtility.getFileName(url));
return true;
}
else if(url!=null && (url.startsWith("http://") || url.startsWith("https://")))
{
// determine for opening the link externally or internally
boolean external = isLinkExternal(url);
boolean internal = isLinkInternal(url);
if(!external && !internal)
{
external = WebViewAppConfig.OPEN_LINKS_IN_EXTERNAL_BROWSER;
}
// open the link
if(external)
{
startWebActivity(url);
return true;
}
else
{
showActionBarProgress(true);
return false;
}
}
else if(url!=null && url.startsWith("mailto:"))
{
MailTo mailTo = MailTo.parse(url);
startEmailActivity(mailTo.getTo(), mailTo.getSubject(), mailTo.getBody());
return true;
}
else if(url!=null && url.startsWith("tel:"))
{
startCallActivity(url);
return true;
}
else if(url!=null && url.startsWith("sms:"))
{
startSmsActivity(url);
return true;
}
else if(url!=null && url.startsWith("geo:"))
{
startMapSearchActivity(url);
return true;
}
else
{
return false;
}
}
});
webView.setOnKeyListener(new View.OnKeyListener()
{
@Override
public boolean onKey(View v, int keyCode, KeyEvent event)
{
if(event.getAction() == KeyEvent.ACTION_DOWN)
{
WebView webView = (WebView) v;
switch(keyCode)
{
case KeyEvent.KEYCODE_BACK:
if(webView.canGoBack())
{
webView.goBack();
return true;
}
break;
}
}
return false;
}
});
webView.requestFocus(View.FOCUS_DOWN); // http://android24hours.blogspot.cz/2011/12/android-soft-keyboard-not-showing-on.html
webView.setOnTouchListener(new View.OnTouchListener()
{
@Override
public boolean onTouch(View v, MotionEvent event)
{
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_UP:
if(!v.hasFocus())
{
v.requestFocus();
}
break;
}
return false;
}
});
// admob
if(WebViewAppConfig.ADMOB && NetworkManager.isOnline(getActivity()))
{
AdRequest adRequest = new AdRequest.Builder()
.addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
.addTestDevice(getString(R.string.admob_test_device_id))
.build();
adView.loadAd(adRequest);
adView.setVisibility(View.VISIBLE);
}
else
{
adView.setVisibility(View.GONE);
}
}
private void controlBack()
{
final WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
if(webView.canGoBack()) webView.goBack();
}
private void controlForward()
{
final WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
if(webView.canGoForward()) webView.goForward();
}
private void controlStop()
{
final WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
webView.stopLoading();
}
private void controlReload()
{
final WebView webView = (WebView) mRootView.findViewById(R.id.fragment_main_webview);
webView.reload();
}
private void startWebActivity(String url)
{
try
{
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
}
catch(ActivityNotFoundException e)
{
// can't start activity
}
}
private void startEmailActivity(String email, String subject, String text)
{
try
{
StringBuilder builder = new StringBuilder();
builder.append("mailto:");
builder.append(email);
Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.parse(builder.toString()));
intent.putExtra(android.content.Intent.EXTRA_SUBJECT, subject);
intent.putExtra(android.content.Intent.EXTRA_TEXT, text);
startActivity(intent);
}
catch(ActivityNotFoundException e)
{
// can't start activity
}
}
private void startCallActivity(String url)
{
try
{
Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse(url));
startActivity(intent);
}
catch(ActivityNotFoundException e)
{
// can't start activity
}
}
private void startSmsActivity(String url)
{
try
{
Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.parse(url));
startActivity(intent);
}
catch(ActivityNotFoundException e)
{
// can't start activity
}
}
private void startMapSearchActivity(String url)
{
try
{
Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
}
catch(android.content.ActivityNotFoundException e)
{
// can't start activity
}
}
private void startShareActivity(String subject, String text)
{
try
{
Intent intent = new Intent(android.content.Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(android.content.Intent.EXTRA_SUBJECT, subject);
intent.putExtra(android.content.Intent.EXTRA_TEXT, text);
startActivity(intent);
}
catch(android.content.ActivityNotFoundException e)
{
// can't start activity
}
}
private boolean isLinkExternal(String url)
{
for(String rule : WebViewAppConfig.LINKS_OPENED_IN_EXTERNAL_BROWSER)
{
if(url.contains(rule)) return true;
}
return false;
}
private boolean isLinkInternal(String url)
{
for(String rule : WebViewAppConfig.LINKS_OPENED_IN_INTERNAL_WEBVIEW)
{
if(url.contains(rule)) return true;
}
return false;
}
}
navigation.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!--
This is a configuration file for navigation menu. You can add/remove/modify menu items as you need.
Important: each of these 4 arrays below must contain the same number of items.
-->
<!-- List of titles in navigation drawer menu -->
<string-array name="navigation_title_list">
<item>Home</item>
<item>Forums</item>
<item>Events</item>
<item>Streams</item>
<item>Media</item>
<item>Members</item>
<item>Blogs</item>
<item>SGN Code</item>
<item>Help and FAQs</item>
<item>Search</item>
</string-array>
<!--
List of webview URLs. You can specify URL link to a web page on the Internet or
URL link to a local page stored in assets directory. Local page does not require Internet connection.
URL to the local page must be in this format: file:///android_asset/example.html
-->
<string-array name="navigation_url_list">
<item>http://thesgn.com/board</item>
<item>http://thesgn.com/board/forums</item>
<item>http://thesgn.com/board/events</item>
<item>http://thesgn.com/board/streams</item>
<item>http://thesgn.com/board/media</item>
<item>http://thesgn.com/board/members-list</item>
<item>http://thesgn.com/board/blogs</item>
<item>http://thesgn.com/board/coc</item>
<item>http://thesgn.com/board/help</item>
<item>http://thesgn.com/board/search</item>
</string-array>
<!-- List of icons in navigation drawer menu -->
<string-array name="navigation_icon_list">
<item>@drawable/home</item>
<item>@drawable/chat</item>
<item>@drawable/calendar</item>
<item>@drawable/streams</item>
<item>@drawable/media</item>
<item>@drawable/members</item>
<item>@drawable/blog</item>
<item>@drawable/cod</item>
<item>@drawable/help</item>
<item>@drawable/search</item>
</string-array>
<!--
List of share messages. Each webview page can be shared via e-mail, sms, social networks etc.
Share button is in the action bar. You can specify a message which gonna be posted.
If you don't want to share the page, keep the item empty.
-->
<string-array name="navigation_share_list">
<item>http://thesgn.com/board</item>
<item>http://thesgn.com/board/forums</item>
<item>http://thesgn.com/board/events</item>
<item>http://thesgn.com/board/streams</item>
<item>http://thesgn.com/board/media</item>
<item>http://thesgn.com/board/members-list</item>
<item>http://thesgn.com/board/blogs</item>
<item>http://thesgn.com/board/coc</item>
<item>http://thesgn.com/board/help</item>
<item>http://thesgn.com/board/search</item>
</string-array>
strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- LANGUAGE INDEPENDENT -->
<string name="app_name">TheSGN</string>
<!-- LANGUAGE DEPENDENT -->
<string name="global_offline_toast">No Internet connection available</string>
<string name="menu_share">Share</string>
<string name="drawer_open">Open navigation drawer</string>
<string name="drawer_close">Close navigation drawer</string>
<string name="placeholder_empty">Not found</string>
<string name="placeholder_offline">No Internet connection available</string>
<string name="fragment_main_downloading">Downloading…</string>
</resources>
можете ли вы разместить фрагмент_раздела? Я думаю, что ваше приложение работает нормально, что вы не видите никаких данных. – pgiitu