如何在onCreate()中重复验证FingerPrint

在onCreate()中重复验证FingerPrint，可以通过以下步骤实现：

1. 导入所需的类和库：import android.Manifest; import android.content.pm.PackageManager; import android.hardware.fingerprint.FingerprintManager; import android.os.Build; import android.os.CancellationSignal; import android.support.annotation.RequiresApi; import android.support.v4.app.ActivityCompat; import android.support.v4.content.ContextCompat;
2. 检查设备是否支持指纹识别：private boolean isFingerprintSensorAvailable() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { FingerprintManager fingerprintManager = (FingerprintManager) getSystemService(FINGERPRINT_SERVICE); if (fingerprintManager != null && fingerprintManager.isHardwareDetected()) { return true; } } return false; }
3. 请求指纹识别权限：private void requestFingerprintPermission() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { if (ContextCompat.checkSelfPermission(this, Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.USE_FINGERPRINT}, REQUEST_FINGERPRINT_PERMISSION); } } }
4. 实现指纹识别回调：private void startFingerprintAuthentication() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { FingerprintManager fingerprintManager = (FingerprintManager) getSystemService(FINGERPRINT_SERVICE); CancellationSignal cancellationSignal = new CancellationSignal(); fingerprintManager.authenticate(null, cancellationSignal, 0, new FingerprintManager.AuthenticationCallback() { @Override public void onAuthenticationError(int errorCode, CharSequence errString) { super.onAuthenticationError(errorCode, errString); // 处理认证错误 }

           @Override

           public void onAuthenticationHelp(int helpCode, CharSequence helpString) {

               super.onAuthenticationHelp(helpCode, helpString);

               // 处理认证帮助信息

           }

           @Override

           public void onAuthenticationSucceeded(FingerprintManager.AuthenticationResult result) {

               super.onAuthenticationSucceeded(result);

               // 处理认证成功

           }

           @Override

           public void onAuthenticationFailed() {

               super.onAuthenticationFailed();

               // 处理认证失败

           }

       }, null);

   }

}

1. 在onCreate()方法中调用上述方法：@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);

   if (isFingerprintSensorAvailable()) {

       requestFingerprintPermission();

       startFingerprintAuthentication();

   }

}

这样，在onCreate()中重复验证FingerPrint的过程就完成了。请注意，上述代码仅适用于Android 6.0（API级别23）及以上的设备。在实际使用中，还需要根据具体需求进行错误处理、用户提示等操作。