实现本机代码时出现构建错误

问题描述 投票：0回答：1

对于背景，这是this上一个问题的延续，建议采用以下方法。

我正在实现下面的本机 Android 代码来调用生物识别身份验证，并使用设备引脚/图案/密码作为备份。我在 android studio 中使用了以下代码，它适用于模拟器和物理设备。本质上，设备身份验证是在应用程序启动时启动的。

主要活动：-

package com.example.deviceauthentication;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.biometric.BiometricPrompt;
import androidx.core.content.ContextCompat;
import androidx.fragment.app.Fragment;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.Toast;
import java.util.concurrent.Executor;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        BiometricFragment biometricFragment = BiometricFragment.newInstance();
        getSupportFragmentManager().beginTransaction()
                .add(R.id.containerId, biometricFragment, "biometric_fragment")
                .commit();


    }
}

生物识别片段类：-

package com.example.deviceauthentication;

import android.os.Build;
import android.os.Bundle;
import androidx.annotation.Nullable;
import androidx.biometric.BiometricManager;
import androidx.fragment.app.Fragment;
import androidx.biometric.BiometricPrompt;
import android.util.Log;
import java.util.concurrent.Executor;
import androidx.annotation.NonNull;


public class BiometricFragment extends Fragment {

    private Executor executor;
    private BiometricPrompt biometricPrompt;
    private BiometricPrompt.PromptInfo promptInfo;


    // Default constructor
    public BiometricFragment() {
        // Required empty public constructor
    }

    // Factory method to create a new instance of the fragment
    public static BiometricFragment newInstance() {
        return new BiometricFragment();
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        startBiometricAuthentication();
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);            
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
            executor = getActivity().getMainExecutor();
        }
    }

    // Method to start the biometric authentication process
    public void startBiometricAuthentication() {
        biometricPrompt = new BiometricPrompt(this, executor, new BiometricPrompt.AuthenticationCallback() {
            @Override
            public void onAuthenticationError(int errorCode, @NonNull CharSequence errString) {
                super.onAuthenticationError(errorCode, errString);
                Log.e("BiometricFragment", "Authentication error: " + errString);
                Log.d("CALLBACK", "*****************False******************");
            }

            @Override
            public void onAuthenticationSucceeded(@NonNull BiometricPrompt.AuthenticationResult result) {
                super.onAuthenticationSucceeded(result);
                Log.d("BiometricFragment", "Authentication succeeded 2");
                Log.d("CALLBACK", "*****************True******************");
                // Authentication succeeded, you can perform further actions here
            }

            @Override
            public void onAuthenticationFailed() {
                super.onAuthenticationFailed();
                Log.e("BiometricFragment", "Authentication failed");
                Log.d("CALLBACK", "*****************False******************");
            }
        });

        promptInfo = new BiometricPrompt.PromptInfo.Builder()
                .setTitle("Biometric Authentication")
                .setSubtitle("Authenticate using your biometric data")
                .setAllowedAuthenticators(BiometricManager.Authenticators.BIOMETRIC_WEAK | BiometricManager.Authenticators.BIOMETRIC_STRONG | BiometricManager.Authenticators.DEVICE_CREDENTIAL)
                .build();

        biometricPrompt.authenticate(promptInfo);
    }
}

我看到 4 个构建错误：-

Compiling with JDK Java compiler API.Compiling with JDK Java compiler API.

/tmp/build3217451114737202177xxx/MavenTestNew/src/main/java/com/jamesco/maventestnew/MyNativeImpl.java:28: error: cannot find symbol/tmp/build3217451114737202177xxx/MavenTestNew/src/main/java/com/jamesco/maventestnew/MyNativeImpl.java:28: error: cannot find symbol

                .add(R.id.containerId, biometricFragment, "biometric_fragment")                .add(R.id.containerId, biometricFragment, "biometric_fragment")

                         ^                         ^

  symbol:   variable containerId  symbol:   variable containerId

  location: class id  location: class id

/tmp/build3217451114737202177xxx/MavenTestNew/src/main/java/com/jamesco/maventestnew/MyNativeImpl.java:27: error: cannot find symbol/tmp/build3217451114737202177xxx/MavenTestNew/src/main/java/com/jamesco/maventestnew/MyNativeImpl.java:27: error: cannot find symbol

        getSupportFragmentManager().beginTransaction()        getSupportFragmentManager().beginTransaction()

        ^        ^

  symbol:   method getSupportFragmentManager()  symbol:   method getSupportFragmentManager()

  location: class MyNativeImpl  location: class MyNativeImpl

/tmp/build3217451114737202177xxx/MavenTestNew/src/main/java/com/jamesco/maventestnew/MyNativeImpl.java:59: error: non-static variable this cannot be referenced from a static context/tmp/build3217451114737202177xxx/MavenTestNew/src/main/java/com/jamesco/maventestnew/MyNativeImpl.java:59: error: non-static variable this cannot be referenced from a static context

            return new BiometricFragment();            return new BiometricFragment();

                   ^                   ^

/tmp/build3217451114737202177xxx/MavenTestNew/src/main/java/com/jamesco/maventestnew/MyNativeImpl.java:58: error: Illegal static declaration in inner class MyNativeImpl.BiometricFragment/tmp/build3217451114737202177xxx/MavenTestNew/src/main/java/com/jamesco/maventestnew/MyNativeImpl.java:58: error: Illegal static declaration in inner class MyNativeImpl.BiometricFragment

        public static BiometricFragment newInstance() {        public static BiometricFragment newInstance() {

                                        ^                                        ^

  modifier 'static' is only allowed in constant variable declarations  modifier 'static' is only allowed in constant variable declarations

Note: Some input files use or override a deprecated API.Note: Some input files use or override a deprecated API.

Note: Recompile with -Xlint:deprecation for details.Note: Recompile with -Xlint:deprecation for details.

Note: Some input files use unchecked or unsafe operations.Note: Some input files use unchecked or unsafe operations.

Note: Recompile with -Xlint:unchecked for details.Note: Recompile with -Xlint:unchecked for details.

4 errors4 errors

Task :compileDebugJavaWithJavac in MavenTestNew FinishedTask :compileDebugJavaWithJavac in MavenTestNew Finished



> Task :compileDebugJavaWithJavac> Task :compileDebugJavaWithJavac FAILED FAILED

:compileDebugJavaWithJavac (Thread[Execution worker for ':',5,main]) completed. Took 5.852 secs.:compileDebugJavaWithJavac (Thread[Execution worker for ':',5,main]) completed. Took 5.852 secs.

AAPT2 aapt2-4.1.1-6503028-linux Daemon #0: shutdownAAPT2 aapt2-4.1.1-6503028-linux Daemon #0: shutdown

AAPT2 aapt2-4.1.1-6503028-linux Daemon #1: shutdownAAPT2 aapt2-4.1.1-6503028-linux Daemon #1: shutdown

AAPT2 aapt2-4.1.1-6503028-linux Daemon #2: shutdownAAPT2 aapt2-4.1.1-6503028-linux Daemon #2: shutdown

AAPT2 aapt2-4.1.1-6503028-linux Daemon #3: shutdownAAPT2 aapt2-4.1.1-6503028-linux Daemon #3: shutdown



FAILURE: FAILURE: Build failed with an exception.Build failed with an exception.

MyNative.java

package com.jamesco.maventestnew;

import com.codename1.system.NativeInterface;

public interface MyNative extends NativeInterface {

    String helloWorld(String hi);
    boolean nativeAuth();

    public class BiometricFragment{}

}

MyNativeImpl.java

package com.jamesco.maventestnew;

import android.util.Log;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.biometric.BiometricPrompt;
import androidx.core.content.ContextCompat;
import androidx.biometric.BiometricManager;
import androidx.biometric.BiometricPrompt;
import androidx.fragment.app.Fragment;
import android.os.Bundle;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.Toast;
import java.util.concurrent.Executor;
import com.codename1.impl.android.AndroidNativeUtil;
import android.os.Build;
import android.app.Activity;


public class MyNativeImpl {

    public boolean nativeAuth(){

        BiometricFragment biometricFragment = BiometricFragment.newInstance();
        getSupportFragmentManager().beginTransaction()
                .add(R.id.containerId, biometricFragment, "biometric_fragment")
                .commit();

        boolean AuthOK = false; //ignore this

        return AuthOK; //ignore this

    }

    public class BiometricFragment extends Fragment {

        private Executor executor;
        private BiometricPrompt biometricPrompt;
        private BiometricPrompt.PromptInfo promptInfo;


        // Default constructor
        public BiometricFragment() {
            // Required empty public constructor
        }

        // Factory method to create a new instance of the fragment
        public static BiometricFragment newInstance() {
            return new BiometricFragment();
        }

        @Override
        public void onActivityCreated(@Nullable Bundle savedInstanceState) {
            super.onActivityCreated(savedInstanceState);
            startBiometricAuthentication();
        }

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            // You can initialize variables or perform other setup here
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
                executor = getActivity().getMainExecutor();
            }
        }

        // Method to start the biometric authentication process
        public void startBiometricAuthentication() {
            biometricPrompt = new BiometricPrompt(this, executor, new BiometricPrompt.AuthenticationCallback() {
                @Override
                public void onAuthenticationError(int errorCode, @NonNull CharSequence errString) {
                    super.onAuthenticationError(errorCode, errString);
                    Log.e("BiometricFragment", "Authentication error: " + errString);
                    Log.d("AUTHENTICATION", "*****************False******************");
                }

                @Override
                public void onAuthenticationSucceeded(@NonNull BiometricPrompt.AuthenticationResult result) {
                    super.onAuthenticationSucceeded(result);
                    Log.d("BiometricFragment", "Authentication succeeded 2");
                    Log.d("AUTHENTICATION", "*****************True******************");
                    // Authentication succeeded, you can perform further actions here
                }

                @Override
                public void onAuthenticationFailed() {
                    super.onAuthenticationFailed();
                    Log.e("BiometricFragment", "Authentication failed");
                    Log.d("AUTHENTICATION", "*****************False******************");
                }
            });

            promptInfo = new BiometricPrompt.PromptInfo.Builder()
                    .setTitle("Biometric Authentication")
                    .setSubtitle("Authenticate using your biometric data")
                    .setAllowedAuthenticators(BiometricManager.Authenticators.BIOMETRIC_WEAK | BiometricManager.Authenticators.BIOMETRIC_STRONG | BiometricManager.Authenticators.DEVICE_CREDENTIAL)
                    .build();

            biometricPrompt.authenticate(promptInfo);
        }
    }

    public String helloWorld(String param) {
        Log.d("MyNewApp", param);
        return "Tada Android";
    }

    public boolean isSupported() {
        return true;
    }

}

我需要指定片段应放置的容器视图 ID，这解释了第一个错误。我怎样才能克服这个问题？另外，如果能帮助解决其他错误，我们将不胜感激。

codenameone
1个回答
0
投票

抱歉，我那里的代码引用了我复制的 

R
类。这不适用于标准 Codename One 类，因为它需要 XML 布局代码。更好的方法是从代码构造片段：

public class JavaFragment extends Fragment {

    @NonNull
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater,
                             ViewGroup container, Bundle savedInstanceState) {
        // Create a LinearLayout
        LinearLayout layout = new LinearLayout(getActivity());
        layout.setLayoutParams(new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT,
                LinearLayout.LayoutParams.MATCH_PARENT));
        layout.setOrientation(LinearLayout.VERTICAL);

        // Add a TextView
        TextView textView = new TextView(getActivity());
        textView.setLayoutParams(new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.WRAP_CONTENT,
                LinearLayout.LayoutParams.WRAP_CONTENT));
        textView.setText("Fragment created entirely in Java!");
        layout.addView(textView);

        return layout;
    }
}

这将创建一个您可以使用的 Fragment 组件。

重要提示：我建议发送一个已注释掉错误代码的构建版本，并在 Android Studio 中使用生成的项目源代码。这将为您提供代码补全并检查编译是否有效。它将使您免于发送构建进行测试的周期。一旦编译并运行它，您只需将本机代码复制回 Codename One 即可。

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