默认的活动没有发现错误，同时启动活动

Question

错误 enter image description here

03/02 22时01分22秒：启动应用程序 当地没有变化，而不是部署APK 无法识别发射活动：默认的活动没有找到 错误而启动活动

这是我AndroidManifist.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.example.rehankhan.teachercourse"> 
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 

    <application 
     android:allowBackup="true" 
     android:label="@string/app_name" 
     android:supportsRtl="true" 
     android:theme="@style/AppTheme"> 
     <meta-data 
      android:name="com.google.android.gms.version" 
      android:value="@integer/google_play_services_version" /> 
     <!-- permission required to use Alarm Manager --> 
     <uses-permission android:name="com.android.alarm.permission.SET_ALARM" /> 
     <uses-feature android:name="android.hardware.sensor.stepcounter" /> 
     <uses-feature android:name="android.hardware.sensor.stepdetector" /> 

     <activity 
      android:name=".MainActivity" 
      android:label="@string/app_name" 
      android:theme="@style/AppTheme.NoActionBar"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
       <action android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
     <activity android:name=".SignUP" /> 
     <activity android:name=".T_TimeTABLE" /> 
     <activity android:name=".Parent_MAin" /> 
     <activity android:name=".attendenceSheet" /> 
     <activity android:name=".Review_from_teacher" /> 
     <activity android:name=".welcom" /> 
     <activity android:name=".Student_MAin" /> 
     <activity 
      android:name=".Fine_attendence" 
      android:label="@string/title_activity_fine_attendence" 
      android:theme="@style/AppTheme.NoActionBar" /> 

     <service android:name=".NotifyService" /> 
     <service android:name=".step_counter"/> 

     <activity android:name=".gps" /> 
     <activity android:name=".course_of_review" /> 
     <activity android:name=".Teacher_MAP"></activity> 
     <activity android:name=".std_course_review"></activity> 
    </application> 

</manifest> 

**摇篮文件**

apply plugin: 'com.android.application' 
android { 
    compileSdkVersion 23 
    buildToolsVersion "23.0.3" 

    defaultConfig { 
     applicationId "com.example.rehankhan.teachercourse" 
     minSdkVersion 15 
     targetSdkVersion 23 
     versionCode 1 
     versionName "1.0" 
     multiDexEnabled true 

    } 
    buildTypes { 
     release { 
      minifyEnabled false 
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
     } 
    } 
} 

Answer 1

更改你的意图过滤器，如下

<intent-filter> 
    <action android:name="android.intent.action.MAIN"/> 

    <category android:name="android.intent.category.LAUNCHER"/> 
</intent-filter> 

您已经添加action而不是两次category

Answer 2

试试这个，

<?xml version="1.0" encoding="utf-8"?> 
    <manifest xmlns:android="http://schemas.android.com/apk/res/android" 
     package="com.example.rehankhan.teachercourse"> 

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 
    <!-- permission required to use Alarm Manager --> 
     <uses-permission android:name="com.android.alarm.permission.SET_ALARM" /> 
     <uses-feature android:name="android.hardware.sensor.stepcounter" /> 
     <uses-feature android:name="android.hardware.sensor.stepdetector" /> 

    <application 
     android:allowBackup="true" 
     android:label="@string/app_name" 
     android:supportsRtl="true" 
     android:theme="@style/AppTheme"> 
     <meta-data 
      android:name="com.google.android.gms.version" 
      android:value="@integer/google_play_services_version" /> 


     <activity 
      android:name=".MainActivity" 
      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=".SignUP" /> 
     <activity android:name=".T_TimeTABLE" /> 
     <activity android:name=".Parent_MAin" /> 
     <activity android:name=".attendenceSheet" /> 
     <activity android:name=".Review_from_teacher" /> 
     <activity android:name=".welcom" /> 
     <activity android:name=".Student_MAin" /> 
     <activity 
      android:name=".Fine_attendence" 
      android:label="@string/title_activity_fine_attendence" 
      android:theme="@style/AppTheme.NoActionBar" /> 

     <service android:name=".NotifyService" /> 
     <service android:name=".step_counter"/> 

     <activity android:name=".gps" /> 
     <activity android:name=".course_of_review" /> 
     <activity android:name=".Teacher_MAP"></activity> 
     <activity android:name=".std_course_review"></activity> 
    </application> 
    </manifest>