android指纹识别调用实现方法及示例代码

概述activity_main.xml源码<?xmlversion=\"1.0\"encoding=\"utf-8\"?><LinearLayoutxmlns:android=\"http://schemas.android.com/apk/res/android\"

activity_main.xml源码

<?xml version="1.0" enCoding="utf-8"?> <linearLayout xmlns:androID="@R_404_6822@://schemas.androID.com/apk/res/androID"   xmlns:tools="@R_404_6822@://schemas.androID.com/tools"   androID:layout_wIDth="match_parent"   androID:layout_height="match_parent"   androID:gravity="center"   androID:orIEntation="vertical"   androID:paddingBottom="@dimen/activity_vertical_margin"   androID:paddingleft="@dimen/activity_horizontal_margin"   androID:paddingRight="@dimen/activity_horizontal_margin"   androID:paddingtop="@dimen/activity_vertical_margin"   tools:context="com.liu.finger.MainActivity">    <TextVIEw     androID:ID="@+ID/textVIEw"     androID:layout_wIDth="wrap_content"     androID:layout_height="wrap_content"     androID:text="Hello World!"     androID:textSize="18sp" />    <button     androID:ID="@+ID/btn_activity_main_finger"     androID:layout_wIDth="match_parent"     androID:layout_height="wrap_content"     androID:layout_alignParentStart="true"     androID:layout_below="@+ID/textVIEw"     androID:layout_margintop="54dp"     androID:text="指纹识别" /> </linearLayout> 

MainActivity.java源码

package com.liu.finger;  import androID.Manifest; import androID.app.KeyguardManager; import androID.content.Context; import androID.content.Intent; import androID.content.pm.PackageManager; import androID.harDWare.fingerprint.FingerprintManager; import androID.os.Bundle; import androID.os.CancellationSignal; import androID.support.v4.app.ActivityCompat; import androID.support.v4.app.FragmentActivity; import androID.util.Log; import androID.vIEw.VIEw; import androID.Widget.button; import androID.Widget.Toast;    public class MainActivity extends FragmentActivity {   FingerprintManager manager;   KeyguardManager mKeyManager;   private final static int REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS = 0;   private final static String TAG = "finger_log";    @OverrIDe   protected voID onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentVIEw(R.layout.activity_main);     manager = (FingerprintManager) this.getSystemService(Context.FINGERPRINT_SERVICE);     mKeyManager = (KeyguardManager) this.getSystemService(Context.KEyguard_SERVICE);     button btn_finger = (button) findVIEwByID(R.ID.btn_activity_main_finger);     btn_finger.setonClickListener(new VIEw.OnClickListener() {       @OverrIDe       public voID onClick(VIEw v) {         if (isFinger()) {           Toast.makeText(MainActivity.this,"请进行指纹识别",Toast.LENGTH_LONG).show();           Log(TAG,"keyi");           startListening(null);         }       }     });    }    public boolean isFinger() {      //androID studio 上，没有这个会报错     if (ActivityCompat.checkSelfPermission(this,Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED) {       Toast.makeText(this,"没有指纹识别权限",Toast.LENGTH_SHORT).show();       return false;     }     Log(TAG,"有指纹权限");     //判断硬件是否支持指纹识别     if (!manager.isHarDWareDetected()) {       Toast.makeText(this,"没有指纹识别模块",Toast.LENGTH_SHORT).show();       return false;     }    Log(TAG,"有指纹模块");     //判断 是否开启锁屏密码      if (!mKeyManager.isKeyguardSecure()) {       Toast.makeText(this,"没有开启锁屏密码","已开启锁屏密码");     //判断是否有指纹录入     if (!manager.hasEnrolledFingerprints()) {       Toast.makeText(this,"没有录入指纹","已录入指纹");      return true;   }    CancellationSignal mCancellationSignal = new CancellationSignal();   //回调方法   FingerprintManager.AuthenticationCallback mSelfCancelled = new FingerprintManager.AuthenticationCallback() {     @OverrIDe     public voID onAuthenticationError(int errorCode,CharSequence errString) {       //但多次指纹密码验证错误后，进入此方法；并且，不能短时间内调用指纹验证       Toast.makeText(MainActivity.this,errString,Toast.LENGTH_SHORT).show();       showAuthenticationScreen();     }      @OverrIDe     public voID onAuthenticationHelp(int helpCode,CharSequence helpString) {        Toast.makeText(MainActivity.this,helpString,Toast.LENGTH_SHORT).show();     }      @OverrIDe     public voID onAuthenticationSucceeded(FingerprintManager.AuthenticationResult result) {        Toast.makeText(MainActivity.this,"指纹识别成功",Toast.LENGTH_SHORT).show();     }      @OverrIDe     public voID onAuthenticationFailed() {       Toast.makeText(MainActivity.this,"指纹识别失败",Toast.LENGTH_SHORT).show();     }   };     public voID startListening(FingerprintManager.CryptoObject cryptoObject) {     //androID studio 上，没有这个会报错     if (ActivityCompat.checkSelfPermission(this,Toast.LENGTH_SHORT).show();       return;     }     manager.authenticate(cryptoObject,mCancellationSignal,mSelfCancelled,null);     }    /**    * 锁屏密码    */   private voID showAuthenticationScreen() {      Intent intent = mKeyManager.createConfirmDeviceCredentialintent("finger","测试指纹识别");     if (intent != null) {       startActivityForResult(intent,REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS);     }   }    @OverrIDe   protected voID onActivityResult(int requestCode,int resultCode,Intent data) {     if (requestCode == REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS) {       // Challenge completed,proceed with using cipher       if (resultCode == RESulT_OK) {         Toast.makeText(this,"识别成功",Toast.LENGTH_SHORT).show();       } else {         Toast.makeText(this,"识别失败",Toast.LENGTH_SHORT).show();       }     }   }    private voID Log(String tag,String msg) {     Log.d(tag,msg);   } } 

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