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Question

我曾在android系統包含四個定時器應用activities.Now我，當我在我的Android設備安裝apk文件會顯示在屏幕上的所有四個活動圖標，而不是隻顯示主顯示屏只有一個MainActivity在Android設備-activity icon ..請幫助我..我的清單文件如下所示;

<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.example.timerdemo2" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk 
     android:minSdkVersion="8" 
     android:targetSdkVersion="15" /> 

    <application 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme" > 
     <activity 
      android:name=".NewProject" 
      android:label="@string/title_activity_main" 
      android:screenOrientation="portrait"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 


      </intent-filter> 
     </activity> 
     <activity 
      android:name=".Timedetails" 
      android:label="@string/title_activity_timedetails" 
      android:screenOrientation="portrait" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 


      </intent-filter> 
     </activity> 
     <activity 
      android:name=".ListActivity" 
      android:label="@string/title_activity_list" 
      android:screenOrientation="portrait" > 
      <intent-filter> 


       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
     <activity 
      android:name=".MainActivity" 
      android:label="@string/title_activity_new_project" 
      android:screenOrientation="portrait" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 


      </intent-filter> 
     </activity> 
    </application> 

</manifest> 

Answer 1

試試這個代碼，而不是上面& 記住應用的主要活動添加標籤

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

你的表現應該是這樣

<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.example.timerdemo2" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk 
     android:minSdkVersion="8" 
     android:targetSdkVersion="15" /> 

    <application 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme" > 
     <activity 
      android:name=".NewProject" 
      android:label="@string/title_activity_main" 
      android:screenOrientation="portrait"> 

     </activity> 
     <activity 
      android:name=".Timedetails" 
      android:label="@string/title_activity_timedetails" 
      android:screenOrientation="portrait" > 

     </activity> 
     <activity 
      android:name=".ListActivity" 
      android:label="@string/title_activity_list" 
      android:screenOrientation="portrait" > 

     </activity> 
     <activity 
      android:name=".MainActivity" 
      android:label="@string/title_activity_new_project" 
      android:screenOrientation="portrait" > 

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

      </intent-filter> 
     </activity> 
    </application> 

</manifest> 

Answer 2

更改你的意圖過濾器，在MAIN/LAUNCHER意圖過濾器本質上是告訴機器人，該活動是應用程序的首發活動 ，而不是使用：

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

用途：

<action android:name="android.intent.action.VIEW" /> 

Answer 3

這是因爲您將</intent-filter>應用於所有活動，而不是主要，只需進行如下更改

<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
     package="com.example.timerdemo2" 
     android:versionCode="1" 
     android:versionName="1.0" > 

     <uses-sdk 
      android:minSdkVersion="8" 
      android:targetSdkVersion="15" /> 

     <application 
      android:icon="@drawable/ic_launcher" 
      android:label="@string/app_name" 
      android:theme="@style/AppTheme" > 
      <activity 
       android:name=".MainActivity" 
       android:label="@string/title_activity_main" 
       android:screenOrientation="portrait"> 
       <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
      </intent-filter> 
      </activity> 

      <activity 
       android:name=".NewProject" 
       android:label="@string/title_activity_new_project" 
       android:screenOrientation="portrait" > 

      </activity> 
      <activity 
       android:name=".Timedetails" 
       android:label="@string/title_activity_timedetails" 
       android:screenOrientation="portrait" > 

      </activity> 
      <activity 
       android:name=".ListActivity" 
       android:label="@string/title_activity_list" 
       android:screenOrientation="portrait" > 

      </activity> 

     </application> 

    </manifest> 

There is quite a bit of documentation on intent Filter