Android指纹认证Demo源码

package com.example.fingerprinttest; import android.annotation.TargetApi; import android.app.DialogFragment; import android.app.KeyguardManager; import android.content.Context; import android.hardware.fingerprint.FingerprintManager; import android.os.Build; import android.os.Bundle; import android.os.CancellationSignal; import android.support.annotation.Nullable; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import android.widget.Toast; import javax.crypto.Cipher; @TargetApi(23) public class FingerprintDialogFragment extends DialogFragment { private FingerprintManager fingerprintManager; private CancellationSignal mCancellationSignal; private Cipher mCipher; private LoginActivity mActivity; private TextView errorMsg; /** * 标识是否是用户主动取消的认证。 */ private boolean isSelfCancelled; public void setCipher(Cipher cipher) { mCipher = cipher; } @Override public void onAttach(Context context) { super.onAttach(context); mActivity = (LoginActivity) getActivity(); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); fingerprintManager = getContext().getSystemService(FingerprintManager.class); setStyle(DialogFragment.STYLE_NORMAL, android.R.style.Theme_Material_Light_Dialog); } @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.fingerprint_dialog, container, false); errorMsg = v.findViewById(R.id.error_msg); TextView cancel = v.findViewById(R.id.cancel); cancel.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { dismiss(); stopListening(); } }); return v; } @Override public void onResume() { super.onResume(); // 开始指纹认证监听 startListening(mCipher); } @Override public void onPause() { super.onPause(); // 停止指纹认证监听 stopListening(); } private void startListening(Cipher cipher) { isSelfCancelled = false; mCancellationSignal = new CancellationSignal(); fingerprintManager.authenticate(new FingerprintManager.CryptoObject(cipher), mCancellationSignal, 0, new FingerprintManager.AuthenticationCallback() { @Override public void onAuthenticationError(int errorCode, CharSequence errString) { if (!isSelfCancelled) { errorMsg.setText(errString); if (errorCode == FingerprintManager.FINGERPRINT_ERROR_LOCKOUT) { Toast.makeText(mActivity, errString, Toast.LENGTH_SHORT).show(); dismiss(); } } } @Override public void onAuthenticationHelp(int helpCode, CharSequence helpString) { errorMsg.setText(helpString); } @Override public void onAuthenticationSucceeded(FingerprintManager.AuthenticationResult result) { Toast.makeText(mActivity, "指纹认证成功", Toast.LENGTH_SHORT).show(); mActivity.onAuthenticated(); } @Override public void onAuthenticationFailed() { errorMsg.setText("指纹认证失败，请再试一次"); } }, null); } private void stopListening() { if (mCancellationSignal != null) { mCancellationSignal.cancel(); mCancellationSignal = null; isSelfCancelled = true; } } }