如何使用 switch to enable/disable the Lock 创建指纹锁

Question

我想将指纹锁集成到我的应用程序中。用户可以选择 enable/disable 使用开关锁定。我怎样才能以编程方式实现它。

例如：

Choice to enable/disable the lock inside the application

When user opens the application

Answer 1

所以我已经在我的应用程序中实现了这种类型的功能，但我不知道它是否可行您可能会找到一种简单明智的方法，但这就是我所做的

我为此使用了共享首选项，所以首先在存在 https://i.stack.imgur.com/3FY78.jpg 的 activity 中，我喜欢下面的

首先我创建了这个方法

private void Biometric(){
    androidx.biometric.BiometricManager biometricManager = androidx.biometric.BiometricManager.from(this);
    switch (biometricManager.canAuthenticate(BiometricManager.Authenticators.BIOMETRIC_WEAK | BiometricManager.Authenticators.DEVICE_CREDENTIAL)) {


        // this means we can use biometric sensor
        case androidx.biometric.BiometricManager.BIOMETRIC_SUCCESS:
            SharedPreferences sharedPreferences = getSharedPreferences("Authentication",0);
            SharedPreferences.Editor editor = sharedPreferences.edit();
            editor.putString(TEXT, "1");
            editor.putBoolean(SWITCH1, Swicth_authenticate.isChecked());
            editor.apply();

            Intent intent = new Intent(AboutActivity.this, edit_profile.class);
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            startActivity(intent);
            finish();

            break;

        // this means that the device doesn't have fingerprint sensor
        case androidx.biometric.BiometricManager.BIOMETRIC_ERROR_NO_HARDWARE:
            Swicth_authenticate.setChecked(false);
            Toast.makeText(this, "Error code 0x08080101 Authentication failed there's no Fingerprint Reader in your device.", Toast.LENGTH_SHORT).show();
            break;

        // this means that biometric sensor is not available
        case androidx.biometric.BiometricManager.BIOMETRIC_ERROR_HW_UNAVAILABLE:
            Swicth_authenticate.setChecked(false);
            Toast.makeText(this, "Error code 0x08080102 Authentication failed biometric system not found.", Toast.LENGTH_SHORT).show();
            break;

        // this means that the device doesn't contain your fingerprint
        case BiometricManager.BIOMETRIC_ERROR_NONE_ENROLLED:
            Swicth_authenticate.setChecked(false);
            Toast.makeText(this, "Error code 0x08080103 There's no password for this device.", Toast.LENGTH_SHORT).show();
            break;
        case BiometricManager.BIOMETRIC_ERROR_SECURITY_UPDATE_REQUIRED:
            break;
        case BiometricManager.BIOMETRIC_ERROR_UNSUPPORTED:
            break;
        case BiometricManager.BIOMETRIC_STATUS_UNKNOWN:
            break;
    }
}

并在用户打开复选框时激活上述方法如果用户停用我运行方法中的以下内容

        SharedPreferences sharedPreferences = getSharedPreferences("Authentication",0);
        SharedPreferences.Editor editor = sharedPreferences.edit();
        editor.putString(TEXT, "0");
        editor.putBoolean(SWITCH1, Swicth_authenticate.isChecked());
        editor.apply();

如您所见，我在该方法和我的启动器中使用了共享首选项activity我做了以下事情。

    SharedPreferences sharedPreferences = getSharedPreferences("Authentication", 0);
        String bio = sharedPreferences.getString(TEXT, "");


        if (bio.equals("1")) {

            BiometricManager biometricManager = androidx.biometric.BiometricManager.from(this);
            switch (biometricManager.canAuthenticate(BiometricManager.Authenticators.BIOMETRIC_WEAK | DEVICE_CREDENTIAL)) {

                // this means we can use biometric sensor
                case BiometricManager.BIOMETRIC_SUCCESS:

                    break;

                // this means that the device doesn't have fingerprint sensor
                case BiometricManager.BIOMETRIC_ERROR_NO_HARDWARE:

                    break;

                // this means that biometric sensor is not available
                case BiometricManager.BIOMETRIC_ERROR_HW_UNAVAILABLE:

                    break;

                // this means that the device doesn't contain your fingerprint
                case BiometricManager.BIOMETRIC_ERROR_NONE_ENROLLED:

                    break;
                case BiometricManager.BIOMETRIC_ERROR_SECURITY_UPDATE_REQUIRED:
                    break;
                case BiometricManager.BIOMETRIC_ERROR_UNSUPPORTED:

                    break;
                case BiometricManager.BIOMETRIC_STATUS_UNKNOWN:

                    break;
            }
            // creating a variable for our Executor
            Executor executor = ContextCompat.getMainExecutor(this);
            // this will give us result of AUTHENTICATION
            final BiometricPrompt biometricPrompt = new BiometricPrompt(StartActivity.this, executor, new BiometricPrompt.AuthenticationCallback() {
                @Override
                public void onAuthenticationError(int errorCode, @NonNull CharSequence errString) {
                    super.onAuthenticationError(errorCode, errString);
                }

                // THIS METHOD IS CALLED WHEN AUTHENTICATION IS SUCCESS
                @Override
                public void onAuthenticationSucceeded(@NonNull BiometricPrompt.AuthenticationResult result) {
                    super.onAuthenticationSucceeded(result);
                    Toast.makeText(getApplicationContext(), "Login Success.", Toast.LENGTH_SHORT).show();
                    Intent intent = new Intent(StartActivity.this, MainActivity.class);
                    startActivity(intent);
                    finish();
                }

                @Override
                public void onAuthenticationFailed() {
                    super.onAuthenticationFailed();
                }
            });
            // creating a variable for our promptInfo
            // BIOMETRIC DIALOG
            final BiometricPrompt.PromptInfo promptInfo = new BiometricPrompt.PromptInfo.Builder().setTitle("Authentication")
                    .setDescription("Use your fingerprint to login ")
                    .setAllowedAuthenticators(BiometricManager.Authenticators.BIOMETRIC_WEAK | DEVICE_CREDENTIAL).build();

            biometricPrompt.authenticate(promptInfo);

        } else {
            Intent intent = new Intent(StartActivity.this, MainActivity.class);
            startActivity(intent);
            finish();
        }

如果您对下面的评论有任何疑问，我知道它非常庞大，但我不知道您知道多少，所以即使您有疑问，我也几乎编写了整个代码，您可以查看以下源代码 https://github.com/MohammedAbidNafi/MessengerByMargs

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