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我不知道什么是错误的项目 这是主要活动文件 即时learnin如何使用选项卡视图这我已经尝试了几次应用程序崩溃开始我已附加日志猫和主要活动代码，请帮我出应用程序在Android中使用选项卡视图崩溃
package com.example.harsimar.tabswithswipableviews;
import android.app.ActionBar;
import android.app.FragmentTransaction;
import android.support.design.widget.TabLayout;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
public class MainActivity extends AppCompatActivity {
private String[] tabNames = {"First", "Second", "Third"};
Toolbar toolbar;
TabLayout tabLayout ;
ViewPager viewPager;
TagPagerAdapter tagPagerAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar=(Toolbar)findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
tabLayout=(TabLayout)findViewById(R.id.tablayout);
viewPager=(ViewPager)findViewById(R.id.viewPager);
tagPagerAdapter=new TagPagerAdapter(getSupportFragmentManager());
tagPagerAdapter.addFragments(new FirstTab(),"fragment tab 1");
tagPagerAdapter.addFragments(new SecondTab(),"fragment tab 2");
tagPagerAdapter.addFragments(new ThirdTab(),"fragment tab 3");
viewPager.setAdapter(tagPagerAdapter);
tabLayout.setupWithViewPager(viewPager);
}
}
And this is the TagPagerAdapter class file
package com.example.harsimar.tabswithswipableviews;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import java.util.ArrayList;
/**
* Created by Harsimar on 02-07-2016.
*/
public class TagPagerAdapter extends FragmentPagerAdapter {
ArrayList<Fragment> fragments=new ArrayList<>();
ArrayList<String> tabTitles =new ArrayList<>();
public void addFragments(Fragment fragments,String titles){
this.fragments.add(fragments);
this.tabTitles.add(titles);
}
public TagPagerAdapter(FragmentManager fm){
super(fm);
}
@Override
public Fragment getItem(int position) {
return fragments.get(position);
}
@Override
public int getCount() {
return fragments.size();
}
@Override
public CharSequence getPageTitle(int position) {
return tabTitles.get(position);
}
}
The main layout xml looks like this
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.harsimar.tabswithswipableviews.MainActivity">
<android.support.design.widget.AppBarLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
>
<include
android:layout_height="wrap_content"
android:layout_width="match_parent"
layout="@layout/toolbar_layout"
/>
<android.support.design.widget.TabLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/tablayout"
app:tabMode="fixed"
app:tabGravity="fill">
</android.support.design.widget.TabLayout>
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/viewPager">
</android.support.v4.view.ViewPager>
</android.support.design.widget.AppBarLayout>
</RelativeLayout>
this is just a basic app to test and learn tab views
but app just crashes before starting
log cat shows
07-02 23:08:11.604 22298-22298/com.example.harsimar.tabswithswipableviews I/art: Not late-enabling -Xcheck:jni (already on)
07-02 23:08:12.103 22298-22298/com.example.harsimar.tabswithswipableviews W/System: ClassLoader referenced unknown path: /data/app/com.example.harsimar.tabswithswipableviews-2/lib/x86
07-02 23:08:14.171 22298-22304/com.example.harsimar.tabswithswipableviews W/art: Suspending all threads took: 7.484ms
07-02 23:08:15.678 22298-22304/com.example.harsimar.tabswithswipableviews W/art: Suspending all threads took: 8.872ms
07-02 23:08:23.459 22298-22298/com.example.harsimar.tabswithswipableviews W/System: ClassLoader referenced unknown path: /data/app/com.example.harsimar.tabswithswipableviews-2/lib/x86
07-02 23:08:23.791 22298-22304/com.example.harsimar.tabswithswipableviews W/art: Suspending all threads took: 6.128ms
07-02 23:08:24.038 22298-22298/com.example.harsimar.tabswithswipableviews W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
07-02 23:08:24.460 22298-22298/com.example.harsimar.tabswithswipableviews D/AndroidRuntime: Shutting down VM
07-02 23:08:24.463 22298-22298/com.example.harsimar.tabswithswipableviews E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.harsimar.tabswithswipableviews, PID: 22298
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.harsimar.tabswithswipableviews/com.example.harsimar.tabswithswipableviews.MainActivity}: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
at android.support.v7.app.AppCompatDelegateImplV7.setSupportActionBar(AppCompatDelegateImplV7.java:197)
at android.support.v7.app.AppCompatActivity.setSupportActionBar(AppCompatActivity.java:126)
at com.example.harsimar.tabswithswipableviews.MainActivity.onCreate(MainActivity.java:23)
at android.app.Activity.performCreate(Activity.java:6237)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
07-02 23:09:02.204 22298-22298/com.example.harsimar.tabswithswipableviews I/Process: Sending signal. PID: 22298 SIG: 9
检查http://stackoverflow.com/q/26515058/2435238 – sJy