java - 如何在恢复后运行上次查看的 Activity ？

Question

我有一个 Android 应用程序。如果我浏览 Activity (例如 MainTabActivity->SearchMapActivity->ListBranchesActivity)，然后隐藏(而不是关闭)我的应用程序，Android 将在重新打开后运行主(MainTabActivity) Activity 。如果我按“后退”按钮，Android 将显示最后一个 Activity (ListBranchesActivity)。如何让我的应用程序在恢复后显示上次 Activity ？我真的不知道如何实现这一目标。有人说将 singleTask 语句添加到 list 中。我的 list :

 <application
       android:allowBackup="true"
       android:icon="@drawable/ic_launcher"
       android:label="@string/app_name"
       android:theme="@android:style/Theme.Holo" 
       android:largeHeap="true"  >  


        <activity
            android:name=".SearchMapActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:configChanges="keyboardHidden|orientation|screenSize"> 

            <intent-filter>             
                <action android:name="android.intent.action.VIEW" />
                <category android:name="android.intent.category.BROWSABLE"/>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
            </activity>         

            <activity
            android:name=".UpdateActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:configChanges="keyboardHidden|orientation|screenSize"> 
                    <intent-filter>             
                <action android:name="android.intent.action.VIEW" />
                <category android:name="android.intent.category.BROWSABLE"/>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
            </activity> 

            <activity
            android:name=".CompanyInfoActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:configChanges="keyboardHidden|orientation|screenSize"> 
                    <intent-filter>             
                <action android:name="android.intent.action.VIEW" />
                <category android:name="android.intent.category.BROWSABLE"/>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
            </activity> 

            <activity
            android:name=".FullMapActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:configChanges="keyboardHidden|orientation|screenSize"> 
                <intent-filter>             
                    <action android:name="android.intent.action.VIEW" />
                    <category android:name="android.intent.category.BROWSABLE"/>
                    <category android:name="android.intent.category.DEFAULT" />
                </intent-filter>        
            </activity> 

            <activity
            android:name=".ListBranchesActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:configChanges="keyboardHidden|orientation|screenSize"> 
                <intent-filter>             
                    <action android:name="android.intent.action.VIEW" />
                    <category android:name="android.intent.category.BROWSABLE"/>
                    <category android:name="android.intent.category.DEFAULT" />
                </intent-filter>        
            </activity> 

            <activity
            android:name=".ListCompaniesByBranchActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:configChanges="keyboardHidden|orientation|screenSize"> 
                <intent-filter>             
                    <action android:name="android.intent.action.VIEW" />
                    <category android:name="android.intent.category.BROWSABLE"/>
                    <category android:name="android.intent.category.DEFAULT" />
                </intent-filter>        
            </activity> 

            <activity
            android:name=".SearchResultActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:configChanges="keyboardHidden|orientation|screenSize">  


                <intent-filter>             
                    <action android:name="android.intent.action.VIEW" />
                    <category android:name="android.intent.category.BROWSABLE"/>
                    <category android:name="android.intent.category.DEFAULT" />
                </intent-filter>        
            </activity> 



        <activity
            android:name=".MainTabActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:configChanges="keyboardHidden|orientation|screenSize">
            <intent-filter>

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

而且这种事情并不是每次都会发生。有时它显示最后一个 Activity ，有时 - 主要 Activity 。

Answer 1

 > Also that thing doesn't happen everytime. Sometimes 
 > it shows last activity, sometimes - main activity. 

有时，如果您的应用程序需要内存，Android 会关闭它。因此，即使您隐藏(未关闭)...[该]应用程序，它也可能已被关闭