在Android的下一個活動的錯誤

Question

當我從MainActiviy開始罰款，但是當我添加另一個活動，然後點擊按鈕，並轉到主要活動顯示我不幸停止工作。我將新活動定義爲我的啓動器活動。應用程序啓動時它的出現，但是當我在按鈕點擊我的主要活動及其停在這裏工作是我的manifist

<?xml version="1.0" encoding="utf-8"?> 

<!-- 
    The ACCESS_COARSE/FINE_LOCATION permissions are not required to use 
    Google Maps Android API v2, but you must specify either coarse or fine 
    location permissions for the 'MyLocation' functionality. 
--> 

<uses-feature 
    android:glEsVersion="0x00020000" 
    android:required="true"/> 

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> 
<uses-permission android:name="android.permission.INTERNET"/> 
<uses-permission android:name="com.myapp.android.locationapi.maps.permission.MAPS_RECEIVE"/> 
<uses-permission android:name="android.permission.INTERNET"/> 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/> 
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> 
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> 

<permission 
    android:name="com.myapp.android.locationapi.maps.permission.MAPS_RECEIVE" 
    android:protectionLevel="signature"/> 

<application 
    android:allowBackup="true" 
    android:icon="@mipmap/ic_launcher" 
    android:label="@string/app_name" 
    android:supportsRtl="true" 
    android:theme="@style/AppTheme"> 
    <uses-library android:name="com.google.android.maps"/> 

    <activity 
     android:name=".chek" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme.NoActionBar"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN"/> 

      <category android:name="android.intent.category.LAUNCHER"/> 
     </intent-filter> 
    </activity> 
    <activity android:name=".SignIn"/> 
    <!--   <activity android:name=".MainActivity"></activity> --> 
    <activity android:name=".Signup"/> 
    <!-- 
     The API key for Google Maps-based APIs is defined as a string resource. 
     (See the file "res/values/google_maps_api.xml"). 
     Note that the API key is linked to the encryption key used to sign the APK. 
     You need a different API key for each encryption key, including the release key that is used to 
     sign the APK for publishing. 
     You can define the keys for the debug and release targets in src/debug/ and src/release/. 
    --> 
    <meta-data 
     android:name="com.google.android.geo.API_KEY" 
     android:value="AIzaSyDauI14NETaUpIitn9lfYvkar11cKKNhIc"/> 

    <activity android:name=".MainActivity"> 
    </activity> 
</application> 

這裏是我開始的活動代碼：

startactivity(new Intent(chck.this,MainActivity.class)); 

，這裏是我的logcat

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.nexurs/com.example.nexurs.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:2455) 
                    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2517) 
                    at android.app.ActivityThread.access$800(ActivityThread.java:162) 
                    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1412) 
                    at android.os.Handler.dispatchMessage(Handler.java:106) 
                    at android.os.Looper.loop(Looper.java:189) 
                    at android.app.ActivityThread.main(ActivityThread.java:5529) 
                    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:950) 
                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:745) 
                   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.AppCompatDelegateImplV9.setSupportActionBar(AppCompatDelegateImplV9.java:199) 
                    at android.support.v7.app.AppCompatActivity.setSupportActionBar(AppCompatActivity.java:133) 
                    at com.example.nexurs.MainActivity.onCreate(MainActivity.java:38) 

Answer 1

添加這兩條線的@風格內部/ AppTheme.NOactionBar

<style name="AppTheme.NoActionBar"> 
    <item name="windowActionBar">false</item> 
    <item name="windowNoTitle">true</item> 
    </style> 

否則刪除安卓主題= 「@風格/ AppTheme.NoActionBar」