谷歌在Android 9.0 API版本28，发布了生物信息综合验证的基础 API

android.hardware.biometrics.BiometricPrompt.BiometricPrompt

所以在android9.0之后使用系统提供的BiometricPrompt来进行指纹识别，BiometricPrompt提供了对话框的构建，方便使用。

首先项目的sdk版本要在28以上

添加权限

代码

private void checkFingerprint() {

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {

// 构建对话框

BiometricPrompt biometricPrompt = new BiometricPrompt.Builder(this)

.setTitle("指纹验证")

.setDescription("请验证指纹")

.setNegativeButton("取消", getMainExecutor(), new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialogInterface, int i) {

Toast.makeText(MainActivity.this, "取消验证", Toast.LENGTH_SHORT).show();

}

}).build();

// 指纹识别回调

BiometricPrompt.AuthenticationCallback authenticationCallback = new BiometricPrompt.AuthenticationCallback() {

@Override

public void onAuthenticationError(int errorCode, CharSequence errString) {

super.onAuthenticationError(errorCode, errString);

Log.i(TAG, "onAuthenticationError: errorCode = " + errorCode + ", errString = " + errString);

}

@Override

public void onAuthenticationSucceeded(BiometricPrompt.AuthenticationResult result) {

super.onAuthenticationSucceeded(result);

Log.i(TAG, "onAuthenticationSucceeded:");

}

@Override

public void onAuthenticationFailed() {

super.onAuthenticationFailed();

Log.i(TAG, "onAuthenticationFailed:");

}

};

// 开始验证指纹

CancellationSignal cancellationSignal = new CancellationSignal();

biometricPrompt.authenticate(cancellationSignal, getMainExecutor(), authenticationCallback);

}

}

效果