如何在另一个项目中调用活动？

Question

嗨,我是Android新手,我创建了2个项目.

现在,我希望在单击按钮时从第一个项目中调用第二个项目中的活动.

第一个项目只处理登录屏幕,当我点击登录按钮时,我需要调用第二个项目中存在的活动.

我在网上搜索,但没有找到任何我理解正确的教程.

嗨,我发现以下错误.

01-30 08:36:47.230: E/dalvikvm(3408): Could not find class 'com.androidhive.googleplacesandmaps.MainActivity', referenced from method org.fluturasymphony.recommendation.LoginActivity$DownloadWebPageTask.doInBackground
01-30 08:36:52.587: E/AndroidRuntime(3408): FATAL EXCEPTION: AsyncTask #1
01-30 08:36:52.587: E/AndroidRuntime(3408): java.lang.RuntimeException: An error occured while executing doInBackground()
01-30 08:36:52.587: E/AndroidRuntime(3408):     at android.os.AsyncTask$3.done(AsyncTask.java:299)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at java.util.concurrent.FutureTask.run(FutureTask.java:239)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at java.lang.Thread.run(Thread.java:856)
01-30 08:36:52.587: E/AndroidRuntime(3408): Caused by: java.lang.NoClassDefFoundError: com.androidhive.googleplacesandmaps.MainActivity
01-30 08:36:52.587: E/AndroidRuntime(3408):     at org.fluturasymphony.recommendation.LoginActivity$DownloadWebPageTask.doInBackground(LoginActivity.java:69)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at org.fluturasymphony.recommendation.LoginActivity$DownloadWebPageTask.doInBackground(LoginActivity.java:1)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at android.os.AsyncTask$2.call(AsyncTask.java:287)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at java.util.concurrent.FutureTask.run(FutureTask.java:234)
01-30 08:36:52.587: E/AndroidRuntime(3408):     ... 3 more

我已宣布清单为此.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="org.fluturasymphony.recommendation"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="9"
              android:targetSdkVersion="11" />
    <uses-permission android:name="android.permission.INTERNET" />    
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <application android:icon="@drawable/ic_launcher" android:label="@string/app_name">
        <activity android:label="@string/app_name" android:name=".LoginActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <activity android:name="org.achartengine.GraphicalActivity" />
        <activity android:name=".CategoryWiseSalesChartActivity" />
        <activity android:name=".ProductWiseSalesChartActivity" />
        <activity android:name="com.androidhive.googleplacesandmaps.MainActivity"/>
        <activity android:label="@string/home_screen" android:name=".HomeActivity" android:configChanges="orientation">            
        </activity>
        <activity android:label="@string/store_screen" android:name=".StoreActivity" android:configChanges="orientation">            
        </activity>
        <activity android:label="@string/store_list_screen" android:name=".StoreListActivity" android:configChanges="orientation">            
        </activity>
        <activity android:label="@string/location_screen" android:name=".StoreMapActivity" android:configChanges="orientation">            
        </activity>
        <activity android:label="@string/recommended_products_list_screen" android:name=".RecommendedProductsListActivity" android:configChanges="orientation">            
        </activity>
        <activity android:label="@string/category_wise_sales_screen" android:name=".CategoryWiseSalesActivity" android:configChanges="orientation">            
        </activity>
        <activity android:label="@string/product_wise_sales_screen" android:name=".ProductWiseSalesActivity" android:configChanges="orientation">            
        </activity>
                <uses-library android:name="com.google.android.maps" />


    </application>



</manifest>

而我正在调用这样的第二类活动.

Intent loginintent = new Intent("com.androidhive.googleplacesandmaps.MainActivity");
                        startActivity(loginintent);

这是正确的吗？？

Answer 1

根据Android，你可以通过创建项目库来处理这个问题，然后在清单文件中定义它并以你想要的方式调用它

作为解释，我按照我的要求执行了此操作，您要在按钮上调用的活动单击在清单中定义它及其完整的包名称，然后当您在按钮上调用它时单击新项目的活动将触发示例执行这是manifest您的第一个项目的文件中的以下内容，定义了类似的内容

<activity 
        android:name="packagefull.activityname"
        android:theme="@android:style/Theme.NoTitleBar.Fullscreen">

    </activity>

在包名称中定义要调用的活动的完整路径，在包名称之后给出活动的名称希望这对您有用，因为这对我来说非常完美