first commit

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.externalNativeBuild

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 25
+    buildToolsVersion "25.0.2"
+    defaultConfig {
+        applicationId "com.arpit.fingerprintsam"
+        minSdkVersion 16
+        targetSdkVersion 25
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+        exclude group: 'com.android.support', module: 'support-annotations'
+    })
+    compile 'com.android.support:appcompat-v7:25.3.1'
+    compile 'com.android.support.constraint:constraint-layout:1.0.2'
+    testCompile 'junit:junit:4.12'
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /Users/achoudhary/Library/Android/sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/arpit/fingerprintsam/ExampleInstrumentedTest.java

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+package com.arpit.fingerprintsam;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumentation test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() throws Exception {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("com.arpit.fingerprintsam", appContext.getPackageName());
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.arpit.fingerprintsam">
+
+    <uses-permission android:name="android.permission.USE_FINGERPRINT" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <activity android:name=".SecondActivity"/>
+
+    </application>
+
+</manifest>

app/src/main/java/com/arpit/fingerprintsam/FingerPrintDialogHelper.java

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+package com.arpit.fingerprintsam;
+
+import android.content.Context;
+import android.hardware.fingerprint.FingerprintManager;
+import android.os.Bundle;
+import android.support.v4.app.DialogFragment;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+/**
+ * Created by arpit on 4/4/17.
+ */
+
+public class FingerPrintDialogHelper extends DialogFragment implements FingerPrintHelper.FingerPrintAuthCallBack {
+
+    private FingerPrintHelper fingerPrintHelper;
+    private FingerprintManager.CryptoObject cryptoObject;
+    private FingerprintManager fingerPrintManager;
+
+    private Button cancelButton;
+    private ImageView touchIcon;
+    private TextView headTextView;
+    private MainActivity activity;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // Do not create a new Fragment when the Activity is re-created such as orientation changes.
+        setRetainInstance(true);
+        setStyle(android.app.DialogFragment.STYLE_NORMAL, android.R.style.Theme_Material_Light_Dialog);
+        setCancelable(false);
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        getDialog().setTitle(getString(R.string.sign_in));
+        View view = inflater.inflate(R.layout.fingerprint_dialog_container, container, false);
+
+        cancelButton = (Button) view.findViewById(R.id.cancel_button);
+        touchIcon = (ImageView) view.findViewById(R.id.fingerprint_icon);
+        headTextView = (TextView) view.findViewById(R.id.fingerprint_description);
+
+
+        fingerPrintHelper = new FingerPrintHelper(fingerPrintManager, cryptoObject, touchIcon, headTextView, this);
+
+        cancelButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                dismiss();
+            }
+        });
+
+        return view;
+    }
+
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
+        activity = (MainActivity) getActivity();
+    }
+
+    public void setCryptoObject(FingerprintManager.CryptoObject cryptoObject) {
+        this.cryptoObject = cryptoObject;
+    }
+
+    public void setFingerPrintManager(FingerprintManager fingerPrintManager) {
+        this.fingerPrintManager = fingerPrintManager;
+    }
+
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        fingerPrintHelper.startListeningForFingerTouch();
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        fingerPrintHelper.stopListeningForFingerTouch();
+    }
+
+    @Override
+    public void onAuthenticated() {
+        activity.beginEncryption(true);
+        dismiss();
+    }
+
+    @Override
+    public void onAuthenticationFailed() {
+        activity.beginEncryption(false);
+        dismiss();
+    }
+}