gradle中设置变量，在代码中读取

原创于 2024-03-04 14:02:01 发布 · 549 阅读

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本文介绍了如何在Android项目的gradlew文件中设置变量appModelCode，以及如何在AndroidManifest.xml中使用这些变量。同时，展示了如何通过getApplicationPlaceholders方法获取XML中的值。

在app的gradlew文件中设置变量appModelCode，设置manifestPlaceholders

android {
    def appModelCode = 1 //1:模式1 2:模式2
    def appModelName = "model1"
    if (appModelCode == 1) {
        ...
    }

    defaultConfig {
        applicationId appId
        minSdk 26
        targetSdk 32
        versionCode appVerCode
        versionName appVerName

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        manifestPlaceholders = [
                appName     : appModeName,
                appModelCode: appModelCode,
                appModeName : appModeName
        ]
    }
}

在AndroidManifest.xml中的application标签中设置

<application>
    <meta-data android:name="appModelCode" android:value="${appModelCode}"/>
    <meta-data android:name="appModeName" android:value="${appModeName}"/>
</application>

代码中获取AndroidManifest.xml中的值

int code = (Integer) AppUtil.getApplicationPlaceholders(this, "appModelCode");
String name = (String) AppUtil.getApplicationPlaceholders(this, "appModeName");

getApplicationPlaceholders方法

/**
     * 在Application获取 manifestPlaceholders 的值
     *
     * @param context
     * @param key
     * @return
     */
    public static Object getApplicationPlaceholders(Context context, String key) {

        Object placeholdersValues = null;
        try {
            ApplicationInfo appInfo = context.getPackageManager().getApplicationInfo(context.getPackageName(), PackageManager.GET_META_DATA);
            if (appInfo == null) {
                return placeholdersValues;
            }
            Bundle metaData = appInfo.metaData;
            if (metaData == null) {
                return placeholdersValues;
            }
                placeholdersValues = metaData.get(key);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return placeholdersValues;
    }