从UnitTest中的清单中获取元数据

Question

I'm currently running into trouble retrieving <meta-data> tags from my AndroidManifest file while being inside an InstrumentationTest.

I am using a library ( Sugar ORM ) which stores some essential information inside these tags. As soon as I use the library inside the code to be tested I run into problems.

AndroidManifest.xml

<manifest package="org.something" ...>
    ...
    <application ...>
        <meta-data android:name="DATABASE" android:value="foo.db" />
        ...
    </application>
</manifest>

Retrieval of the metadata works like that:

PackageManager pm = context.getPackageManager();
try {
    ApplicationInfo ai = pm.getApplicationInfo(context.getPackageName(), PackageManager.GET_META_DATA);
    value = ai.metaData.getString(name);
} catch (Exception e) {
    Log.d("sugar", "Couldn't find config value: " + name);
}

The test is running as a InstrumentationTestCase and sets up the context to be getInstrumentation().getContext() .

Answer 1

I know that this is quite old, however if anyone else is interested, I had this same problem I fixed it by moving the meta-data fields into the application.

So this:

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

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<meta-data android:name="DATABASE" android:value="coffee.db" />
<meta-data android:name="VERSION" android:value="2" />
<meta-data android:name="QUERY_LOG" android:value="true" />
<meta-data android:name="DOMAIN_PACKAGE_NAME" android:value="com.percolate" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme"
    android:name="com.orm.SugarApp">
    <activity
        android:name=".activity.CoffeeTypeListViewActivity"
        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=".activity.CoffeeTypeDetailedViewAcitivity"
        android:label="@string/title_activity_coffee_type_detailed_view_acitivity"
        android:parentActivityName=".activity.CoffeeTypeListViewActivity">

    </activity>
    <!-- SERVICES -->
    <service
        android:name="com.octo.android.robospice.Jackson2SpringAndroidSpiceService"
        android:exported="false"/>
    <service
        android:name="com.octo.android.robospice.spicelist.okhttp.OkHttpBitmapSpiceService"
        android:exported="false"/>

</application>

becomes this:

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

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<meta-data android:name="DATABASE" android:value="coffee.db" />
<meta-data android:name="VERSION" android:value="2" />
<meta-data android:name="QUERY_LOG" android:value="true" />
<meta-data android:name="DOMAIN_PACKAGE_NAME" android:value="com.percolate" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme"
    android:name="com.orm.SugarApp">
    <activity
        android:name=".activity.CoffeeTypeListViewActivity"
        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=".activity.CoffeeTypeDetailedViewAcitivity"
        android:label="@string/title_activity_coffee_type_detailed_view_acitivity"
        android:parentActivityName=".activity.CoffeeTypeListViewActivity">

    </activity>
    <!-- SERVICES -->
    <service
        android:name="com.octo.android.robospice.Jackson2SpringAndroidSpiceService"
        android:exported="false"/>
    <service
        android:name="com.octo.android.robospice.spicelist.okhttp.OkHttpBitmapSpiceService"
        android:exported="false"/>

</application>

Answer 2

The problem is that InstrumentationTestCase does not contain the meta data from your application. All you need to do is extend ApplicationTestCase<Application> for your test case class.

You can call getContext() in your test cases and that will have the appropriate information in there.

PackageManager pm = getContext().getPackageManager();
ApplicationInfo ai = pm.getApplicationInfo(getContext().getPackageName(), PackageManager.GET_META_DATA);