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   源码介绍

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package gaoyang.biometricdemo;

import android.os.Build;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.nestia.biometriclib.BiometricPromptManager;

public class MainActivity extends AppCompatActivity {

    private TextView mTextView;
    private Button mButton;
    private BiometricPromptManager mManager;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mTextView = findViewById(R.id.text_view);
        mButton = findViewById(R.id.button);

        mManager = BiometricPromptManager.from(this);
        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.append("SDK version is "  Build.VERSION.SDK_INT);
        stringBuilder.append("\n");
        stringBuilder.append("isHardwareDetected : " mManager.isHardwareDetected());
        stringBuilder.append("\n");
        stringBuilder.append("hasEnrolledFingerprints : " mManager.hasEnrolledFingerprints());
        stringBuilder.append("\n");
        stringBuilder.append("isKeyguardSecure : " mManager.isKeyguardSecure());
        stringBuilder.append("\n");

        mTextView.setText(stringBuilder.toString());

        mButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (mManager.isBiometricPromptEnable()) {
                    mManager.authenticate(new BiometricPromptManager.OnBiometricIdentifyCallback() {
                        @Override
                        public void onUsePassword() {
                            Toast.makeText(MainActivity.this, "onUsePassword", Toast.LENGTH_SHORT).show();
                        }

                        @Override
                        public void onSucceeded() {

                            Toast.makeText(MainActivity.this, "onSucceeded", Toast.LENGTH_SHORT).show();
                        }

                        @Override
                        public void onFailed() {

                            Toast.makeText(MainActivity.this, "onFailed", Toast.LENGTH_SHORT).show();
                        }

                        @Override
                        public void onError(int code, String reason) {

                            Toast.makeText(MainActivity.this, "onError", Toast.LENGTH_SHORT).show();
                        }

                        @Override
                        public void onCancel() {

                            Toast.makeText(MainActivity.this, "onCancel", Toast.LENGTH_SHORT).show();
                        }
                    });
                }
            }
        });
    }
}