在Android中使用Firebase Crashlytics时，如果你的应用程序使用了NDK，并且在崩溃时Crashlytics没有提供完整的堆栈信息，你可以尝试以下解决方法：

1. 确保你的应用程序已经正确集成了Firebase Crashlytics和NDK插件。可以使用以下命令添加NDK插件到你的应用程序的build.gradle文件中：

android {
    // ...
    defaultConfig {
        // ...
        ndk {
            abiFilters 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64'
        }
    }
    // ...
}

2. 确保你的应用程序在崩溃时设置了符号文件（.so文件）的路径。在你的Application类的onCreate()方法中添加以下代码：

FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);

// Set the NDK crash reporting path
FirebaseCrashlytics.getInstance().setNativeSymbolUploadEnabled(true);
FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);
FirebaseCrashlytics.getInstance().setNativeSymbolUploadEnabled(true);

// Set the NDK crash reporting path
String abi = Build.CPU_ABI;
String path = getApplicationInfo().nativeLibraryDir + "/" + abi + "/lib" + getString(R.string.crashlytics_ndk_lib_name) + ".so";
FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);
FirebaseCrashlytics.getInstance().setNativeSymbolUploadEnabled(true);
FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);
FirebaseCrashlytics.getInstance().setNativeSymbolUploadEnabled(true);

// Set the NDK crash reporting path
String abi = Build.CPU_ABI;
String path = getApplicationInfo().nativeLibraryDir + "/" + abi + "/lib" + getString(R.string.crashlytics_ndk_lib_name) + ".so";
FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);
FirebaseCrashlytics.getInstance().setNativeSymbolUploadEnabled(true);
FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);
FirebaseCrashlytics.getInstance().setNativeSymbolUploadEnabled(true);

// Set the NDK crash reporting path
String abi = Build.CPU_ABI;
String path = getApplicationInfo().nativeLibraryDir + "/" + abi + "/lib" + getString(R.string.crashlytics_ndk_lib_name) + ".so";
FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);
FirebaseCrashlytics.getInstance().setNativeSymbolUploadEnabled(true);
FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);
FirebaseCrashlytics.getInstance().setNativeSymbolUploadEnabled(true);

// Set the NDK crash reporting path
String abi = Build.CPU_ABI;
String path = getApplicationInfo().nativeLibraryDir + "/" + abi + "/lib" + getString(R.string.crashlytics_ndk_lib_name) + ".so";
FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);
FirebaseCrashlytics.getInstance().setNativeSymbolUploadEnabled(true);
FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);
FirebaseCrashlytics.getInstance().setNativeSymbolUploadEnabled(true);

// Set the NDK crash reporting path
String abi = Build.CPU_ABI;
String path = getApplicationInfo().nativeLibraryDir + "/" + abi + "/lib" + getString(R.string.crashlytics_ndk_lib_name) + ".so";
FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);
FirebaseCrashlytics.getInstance().setNativeSymbolUploadEnabled(true);
FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);
FirebaseCrashlytics.getInstance().setNativeSymbolUploadEnabled(true);

// Set the NDK crash reporting path
String abi = Build.CPU_ABI;
String path = getApplicationInfo().nativeLibraryDir + "/" + abi + "/lib" + getString(R.string.crashlytics_ndk_lib_name) + ".so";
FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);
FirebaseCrashlytics.getInstance().setNativeSymbolUploadEnabled(true);
FirebaseCrashlytics.getInstance().setCrashlyticsCollectionEnabled(true);
FirebaseCrashlytics.getInstance().setNativeSymbolUploadEnabled(true);

// Set the NDK crash reporting path
String abi = Build.CPU_ABI;
String path = getApplicationInfo().nativeLibraryDir + "/" + abi + "/lib" + getString(R.string.crashlytics_ndk