我想在我的Android应用程序中添加工具栏，但是在我的应用程序在git上运行后，我在StudentDashboardActivity.java中收到此错误。我无法找到它背后的问题。
FATAL EXCEPTION: main
Process: com.technerdshub.vusocial, PID: 31319
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.technerdshub.vusocial/com.technerdshub.vusocial.Activities.StudentDashboardActivity}: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2693)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2758)
at android.app.ActivityThread.access$900(ActivityThread.java:177)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1448)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5942)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1389)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1184)
Caused by: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
at android.support.v7.app.AppCompatDelegateImplV7.setSupportActionBar(AppCompatDelegateImplV7.java:198)
at android.support.v7.app.AppCompatActivity.setSupportActionBar(AppCompatActivity.java:130)
at com.technerdshub.vusocial.Activities.StudentDashboardActivity.onCreate(StudentDashboardActivity.java:51)
at android.app.Activity.performCreate(Activity.java:6289)
StudentDashboardActivity.java
package com.technerdshub.vusocial.Activities;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import com.google.android.gms.appindexing.Action;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.common.api.GoogleApiClient;
import com.technerdshub.vusocial.Fragments.TaskFragment;
import com.technerdshub.vusocial.Fragments.dummy.DummyContent;
import com.technerdshub.vusocial.R;
import java.util.ArrayList;
import java.util.List;
public class StudentDashboardActivity extends AppCompatActivity {
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
/**
* ATTENTION: This was auto-generated to implement the App Indexing API.
* See https://g.co/AppIndexing/AndroidStudio for more information.
*/
private GoogleApiClient client;
@Override
protected void onCreate(Bundle savedInstanceState) {
displayLoginActivity();
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_student_dashboard);
// Parse.initialize(new Parse.Configuration.Builder(this)
// .applicationId("J5CIV2z6xeSCXDqdOfhE0kPSikvRFPyDyOJxqJNx")
// .clientKey("bEWm4nWtWiBrMczGfOvA7s4Ulr2bAU3W3TtVSLDf")
// .build()
// );
toolbar = (Toolbar) findViewById(R.id.tool_bar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setElevation(2);
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
// ParseObject testObject = new ParseObject("Task");
// testObject.put("marks", 99);
// testObject.saveInBackground();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new TaskFragment(), "Quiz");
adapter.addFragment(new TaskFragment(), "Assignment");
adapter.addFragment(new TaskFragment(), "GDB");
viewPager.setAdapter(adapter);
}
private void displayLoginActivity() {
Intent i = new Intent(this, Login.class);
startActivity(i);
}
@Override
public void onStart() {
super.onStart();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client.connect();
Action viewAction = Action.newAction(
Action.TYPE_VIEW, // TODO: choose an action type.
"StudentDashboard Page", // TODO: Define a title for the content shown.
// TODO: If you have web page content that matches this app activity's content,
// make sure this auto-generated web page URL is correct.
// Otherwise, set the URL to null.
Uri.parse("http://host/path"),
// TODO: Make sure this auto-generated app URL is correct.
Uri.parse("android-app://com.technerdshub.vusocial.Activities/http/host/path")
);
AppIndex.AppIndexApi.start(client, viewAction);
}
@Override
public void onStop() {
super.onStop();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
Action viewAction = Action.newAction(
Action.TYPE_VIEW, // TODO: choose an action type.
"StudentDashboard Page", // TODO: Define a title for the content shown.
// TODO: If you have web page content that matches this app activity's content,
// make sure this auto-generated web page URL is correct.
// Otherwise, set the URL to null.
Uri.parse("http://host/path"),
// TODO: Make sure this auto-generated app URL is correct.
Uri.parse("android-app://com.technerdshub.vusocial.Activities/http/host/path")
);
AppIndex.AppIndexApi.end(client, viewAction);
client.disconnect();
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<TaskFragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
@Override
public TaskFragment getItem(int position) {
return mFragmentList.get(position);
}
@Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(TaskFragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
@Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
}
style.xml
<resources xmlns:tools="http://schemas.android.com/tools">
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/ColorPrimary</item>
<item name="colorPrimaryDark">@color/ColorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<!--<style name="AppTheme.NoActionBar" parent="Theme.AppCompat.NoActionBar">-->
<!--<item name="windowActionBar">false</item>-->
<!--<item name="windowNoTitle">true</item>-->
<!--</style>-->
<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" >
</style>
<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
<style name="TEST" parent="AppTheme" >
<item name="colorPrimary">@color/com_facebook_blue</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="android:colorBackground">@color/cardview_light_background</item>
<item name="colorPrimaryDark">@color/com_facebook_button_background_color_selected</item>
</style>
<!--<!– new design fai–>-->
<!--<style name="MyMaterialTheme" parent="MyMaterialTheme.Base">-->
<!--</style>-->
<!--<style name="MyMaterialTheme.Base" parent="Theme.AppCompat.Light.NoActionBar">-->
<!--<item name="windowNoTitle">true</item>-->
<!--<item name="windowActionBar">false</item>-->
<!--<item name="colorPrimary">@color/colorPrimary</item>-->
<!--<item name="colorPrimaryDark">@color/colorPrimaryDark</item>-->
<!--<item name="colorAccent">@color/colorAccent</item>-->
<!--</style>-->
</resources>
请告诉我，我该如何解决此错误？
答案 0 :(得分：1)
在style.xml
中将windowActionBar的app主题声明为false <item name="windowNoTitle">true</item>
如果您已经使用任何应用支持库，主题还需要包含在下面的行
var usernames = [String]()
var sentDate = [NSDate]()
var details = [String]()
var userImage = [PFFile]()
@IBAction func backToProfile(sender: AnyObject) {
self.performSegueWithIdentifier("messagesToProfile", sender: self)
}
override func viewDidLoad() {
super.viewDidLoad()
let messagesQuery = PFQuery(className: "Messages")
messagesQuery.whereKey("recipientId", equalTo: PFUser.currentUser()!.objectId!)
messagesQuery.includeKey("senderId")
messagesQuery.orderByDescending("createdAt")
messagesQuery.findObjectsInBackgroundWithBlock({ (objects, error) -> Void in
if error != nil {
print(error)
}
if error == nil {
if let objects = objects {
self.usernames.removeAll(keepCapacity: true)
self.sentDate.removeAll(keepCapacity: true)
self.details.removeAll(keepCapacity: true)
self.userImage.removeAll(keepCapacity: true)
for object in objects {
self.sentDate.append(object.createdAt! as NSDate)
if (object["item"] != nil) {
self.details.append(object["item"] as! String)
} else {
self.details.append(object["request"] as! String)
}
let senderObject = (object["senderId"] as! PFUser)
let senderId = (senderObject.objectId! as String)
print(senderId)
// Query for sender info
let userQuery = PFUser.query()
userQuery?.whereKey("objectId", equalTo: senderId)
userQuery?.getFirstObjectInBackgroundWithBlock({ (object, error) in
self.usernames.append((object!["username"] as! String))
//self.userImage.append(object!["profilePicture"] as! PFFile)
})
}
dispatch_async(dispatch_get_main_queue()) {
self.tableView.reloadData()
//self.search.resignFirstResponder()
}
}
}
})
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return sentDate.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("messageCell", forIndexPath: indexPath) as! MessageTableViewCell
//print(usernames[indexPath.row])
cell.senderUsername.text = usernames[indexPath.row]
cell.itemOrPreview.text = details[indexPath.row]
let date = sentDate[indexPath.row]
let formatter = NSDateFormatter()
formatter.dateStyle = NSDateFormatterStyle.LongStyle
formatter.timeStyle = .ShortStyle
let dateString = formatter.stringFromDate(date)
cell.sentDate.text = dateString
//userImage[indexPath.row].getDataInBackgroundWithBlock { (data, error) in
// if let downloadedItemImage = UIImage(data: data!) {
// cell.senderImage?.image = downloadedItemImage
//}
//}
return cell
}
override func viewWillAppear(animated: Bool) {
tableView.reloadData()
}
答案 1 :(得分：1)
尝试将style.xml更改为下面的代码
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="android:windowActionBar">false</item>
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>