Android指纹验证(BiometricPrompt)

1.先导依赖

implementation "androidx.biometric:biometric:1.1.0"

2.布局里写一个按钮方法

<Button
        android:text="指纹"
        android:onClick="check"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"></Button>

3.`按钮方法

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.biometric.BiometricPrompt;
import androidx.core.content.ContextCompat;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class CheckActivity extends AppCompatActivity {

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

    }

    public void check(View view){
        BiometricPrompt.PromptInfo promptInfo = new BiometricPrompt.PromptInfo.Builder()
                .setTitle("指纹验证")
                .setDescription("正在进行指纹验证")
                .setNegativeButtonText("取消")  //缺一不可
                .build();

        new BiometricPrompt(this, ContextCompat.getMainExecutor(this), new BiometricPrompt.AuthenticationCallback() {
            @Override
            public void onAuthenticationError(int errorCode, @NonNull CharSequence errString) {
                super.onAuthenticationError(errorCode, errString);
                //错误提示 吐司
                Toast.makeText(CheckActivity.this,errString,Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onAuthenticationSucceeded(@NonNull BiometricPrompt.AuthenticationResult result) {
                super.onAuthenticationSucceeded(result);
                //成功验证后执行
                Intent intent =new Intent(CheckActivity.this,LoginActivity.class);
                startActivity(intent);

            }

            @Override
            public void onAuthenticationFailed() {
                super.onAuthenticationFailed();
                Toast.makeText(CheckActivity.this,"验证失败",Toast.LENGTH_SHORT).show();
            }
        }).authenticate(promptInfo);
    }

}

注:需要指纹传感器设备
`