Android 指纹功能实例代码

2023-09-18 17:09:05 139

最近在做项目的时候遇到了添加打开app图像解锁的功能,自己嘴欠说现在都用指纹功能,自己给自己挖了一个坑,真是没谁了

从网上看了一些资料,但是给我demo考虑的不是很多,设备支不支持都没考虑,如果支持的话是否添加过指纹也不知道,其实方法都很简单。

废话不多说,贴上工具类和使用方法

packagecom.tsm.test;
importandroid.annotation.TargetApi;
importandroid.app.Activity;
importandroid.app.KeyguardManager;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.os.Build;
importandroid.support.v4.hardware.fingerprint.FingerprintManagerCompat;
importandroid.support.v4.os.CancellationSignal;
/**
*Createdbytsmon2017/3/20.
*
*指纹识别功能
*
*如果创建了该类的实例,必须调用stopsFingerPrintListen方法
*
*添加权限
*
*
*/
publicclassFingerPrintUiHelperextendsFingerprintManagerCompat.AuthenticationCallback{
privatefinalFingerPrintCallBackcallback;
privateCancellationSignalsignal;
privateFingerprintManagerCompatfingerprintManager;
/**
*如果失败次数过多,调用系统的startActivityForResult
*这个是code
*/
publicstaticfinalintREQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS=10;
/**
*用于提示用户还可以尝试几次,比较友好
*/
privateintcount;
/**
*控制是否开启过指纹功能
*/
publicbooleanisStartFinger;
/**
*初始化指纹功能
*@paramactivity
*@paramcallback
*/
publicFingerPrintUiHelper(Activityactivity,FingerPrintCallBackcallback){
this.callback=callback;
signal=newCancellationSignal();
fingerprintManager=FingerprintManagerCompat.from(activity);
isStartFinger=false;
if(!fingerprintManager.isHardwareDetected()){
if(callback!=null)
callback.doNotSupportFinger();
return;
}
if(!fingerprintManager.hasEnrolledFingerprints()){
if(callback!=null)
callback.FingerClosed();
}
}
/**
*开始扫描指纹
*/
publicvoidstartFingerPrintListen(){
count=5;
isStartFinger=true;
fingerprintManager.authenticate(null,0,signal,this,null);
}
/**
*初始化未必调用startFingerPrintListen
*所以添加变量控制
*/
publicvoidstopsFingerPrintListen(){
if(isStartFinger){
if(signal!=null&&!signal.isCanceled()){
signal.cancel();
}
}
}
/**
*识别成功
*@paramresult
*/
@Override
publicvoidonAuthenticationSucceeded(FingerprintManagerCompat.AuthenticationResultresult){
if(callback!=null)
callback.onAuthenticationSucceeded();
}
/**
*识别失败
*/
@Override
publicvoidonAuthenticationFailed(){
count--;
if(count>0){
if(callback!=null)
callback.onAuthenticationFailed(count);
return;
}
}
/**
*有错误
*@paramerrMsgId
*@paramerrString
*/
@Override
publicvoidonAuthenticationError(interrMsgId,CharSequenceerrString){
if(errMsgId==5){
if(callback!=null)
callback.FingerClosed();
return;
}
if(errMsgId==7){
if(callback!=null)
callback.onAuthenticationError();
return;
}
}
/**
*多次调用指纹识别失败后,调用此方法
*
*@paramactivity
*/
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
publicstaticvoidjumpToGesturePassCheck(Activityactivity){
KeyguardManagerkeyguardManager=
(KeyguardManager)activity.getSystemService(Context.KEYGUARD_SERVICE);
Intentintent=
keyguardManager.createConfirmDeviceCredentialIntent("finger","测试指纹识别");
activity.startActivityForResult(intent,REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS);
}
interfaceFingerPrintCallBack{
/**
*识别成功
*/
voidonAuthenticationSucceeded();
/**
*识别失败
*
*@paramcount还可以尝试的次数
*@paramcount
*/
voidonAuthenticationFailed(intcount);
/**
*失败次数过多
*/
voidonAuthenticationError();
/**
*未开启指纹功能
*/
voidFingerClosed();
/**
*不支持指纹功能
*/
voiddoNotSupportFinger();
}
}

这个是工具类,下面上使用方法

packagecom.tsm.test;
importandroid.app.Activity;
importandroid.content.Intent;
importandroid.os.Build;
importandroid.os.Bundle;
importandroid.util.Log;
importandroid.view.View;
importandroid.widget.Button;
importandroid.widget.Toast;
publicclassMainActivityextendsActivityimplementsFingerPrintUiHelper.FingerPrintCallBack{
privateFingerPrintUiHelperfingerPrintUiHelper;
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.M){////指纹功能是23之后的版本才有的
initFingerPrint();
Buttonbutton=(Button)findViewById(R.id.button);
assertbutton!=null;
button.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
fingerPrintUiHelper.startFingerPrintListen();
}
});
findViewById(R.id.btn).setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
fingerPrintUiHelper.stopsFingerPrintListen();
}
});
}
}
privatevoidinitFingerPrint(){
fingerPrintUiHelper=newFingerPrintUiHelper(this,this);
}
@Override
protectedvoidonActivityResult(intrequestCode,intresultCode,Intentdata){
if(requestCode==FingerPrintUiHelper.REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS){
//Challengecompleted,proceedwithusingcipher
if(resultCode==RESULT_OK){
Toast.makeText(this,"识别成功",Toast.LENGTH_SHORT).show();
//jumpToMain2Activity();
}else{
Toast.makeText(this,"识别失败",Toast.LENGTH_SHORT).show();
}
}
}
@Override
protectedvoidonDestroy(){
if(fingerPrintUiHelper!=null)
fingerPrintUiHelper.stopsFingerPrintListen();
super.onDestroy();
}
/**
*成功
*/
@Override
publicvoidonAuthenticationSucceeded(){
Toast.makeText(this,"识别成功",Toast.LENGTH_SHORT).show();
}
@Override
publicvoidonAuthenticationFailed(intcount){
Stringmsg="您还可以尝试%d次";
Toast.makeText(this,String.format(msg,count),Toast.LENGTH_SHORT).show();
}
/**
*验证失败,走密码验证
*/
@Override
publicvoidonAuthenticationError(){
FingerPrintUiHelper.jumpToGesturePassCheck(this);
}

/**
*没有指纹功能
*/
@Override
publicvoidFingerClosed(){
//TODO可以写一个Dialog跳转设置页,这里我就不写了
Toast.makeText(this,"指纹功能已关闭",Toast.LENGTH_SHORT).show();
}
@Override
publicvoiddoNotSupportFinger(){
Log.i("info","-------------doNotSupportFinger--------------------");
Toast.makeText(this,"该设备不支持指纹功能",Toast.LENGTH_SHORT).show();
}
}

最后添加权限:

总结

以上所示是小编给大家介绍的Android指纹功能实例代码，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！

Android 指纹功能实例代码

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