在 Android 中首先启动一个 Activity？
我在按顺序启动活动时遇到问题，我不知道这是清单中的问题还是代码中的问题。我不久前测试过这段代码，当时它可以工作，但现在不行了。 第一个活动链接到第二个活动，第二个活动又链接到第三个活动。我在清单中首先列出了第一个活动。但是，当我启动模拟器时，首先运行的是第二个活动。我很困惑。这是我的清单：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="hmdywifinal.com"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".Activity1"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".Activity2"
android:label="Startpage">
</activity>
<activity android:name=".Activity3"
android:label="Activity3"></activity>
</application>
你觉得有什么问题吗？
I'm having an issue starting activities in order, and I don't know if it is an issue in the manifest or in the code. I tested this code a while ago when it was working, but now it's not.
The first activity links to the second, which links to the third. I listed the first activity first in the manifest. However, when I start my emulator, it's the second activity that runs first. I am very confused. Here is my manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="hmdywifinal.com"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".Activity1"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".Activity2"
android:label="Startpage">
</activity>
<activity android:name=".Activity3"
android:label="Activity3"></activity>
</application>
Do you think something is wrong with it?
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确保您是从 Activity1 而不是从 Activity2 运行程序。
如果您从 Activity2 运行它，它将跳过 Activity1，即使您已按照上述方式设置了清单。
Make sure you are running your program from Activity1 and not from Activity2.
If you run it from Activity2 it will skip Activity1 even though you have your manifest set like you described above.
Manifest 文件声明 Activity 的顺序与运行时顺序无关。
第一个 Activity 从启动器启动（在您的情况下为 Activity1），
我假设您在代码中使用 Intents 启动 Activity2 和 3。因此，您可以控制这些活动的启动方式。
Order in which Manifest file declares Activities has nothing to do with the runtime order.
First Activity gets launched from a Launcher ( which is Activity1 in your case )
I am assuming you are launching Activity2 and 3 using Intents in your code. So you are in control on the way these activities get launched.
请参阅 api Demos，其中有类似的应用程序 Proof Of Concept。它会让您更好地了解从一个应用程序迁移到另一个应用程序。
Refer to the api Demos, Which has got a similar application Proof Of Concept. It will give you a better idea on mving from one application to other.