Add Java-based sample.

javasample/.gitignore

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+/build

javasample/build.gradle

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+apply plugin: 'com.android.application'
+
+
+android {
+    compileSdkVersion parent.ext.compileSdkVersion
+    buildToolsVersion parent.ext.buildToolsVersion
+
+
+    defaultConfig {
+        applicationId "com.jesusm.kfingerprintmanager.javasample"
+        minSdkVersion parent.ext.minSdkVersion
+        targetSdkVersion parent.ext.targetSdkVersion
+        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'])
+    compile project(':kfingerprintmanager')
+
+    compile 'com.android.support.constraint:constraint-layout:1.0.2'
+}

javasample/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/jesus/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

javasample/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.jesusm.fingerprintmanager.javasample">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name="com.jesusm.fingerprintmanager.javasample.MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

javasample/src/main/java/com/jesusm/fingerprintmanager/javasample/MainActivity.java

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+package com.jesusm.fingerprintmanager.javasample;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.TextView;
+
+import com.jesusm.kfingerprintmanager.KFingerprintManager;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class MainActivity extends AppCompatActivity {
+
+    private static final String KEY = "KEY";
+    private int dialogTheme;
+    private TextView messageText;
+    private EditText encryptionMessageEditText;
+    private Button encryptButton;
+    private Button decryptButton;
+    private String messageToDecrypt;
+
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        selectView(findViewById(R.id.buttonDialogThemeLight));
+        messageText = (TextView) findViewById(R.id.message);
+        encryptionMessageEditText = (EditText) findViewById(R.id.editText);
+        encryptButton = (Button) findViewById(R.id.buttonEncrypt);
+        decryptButton = (Button) findViewById(R.id.buttonDecrypt);
+
+        initClickListeners();
+    }
+
+    private void initClickListeners() {
+        findViewById(R.id.buttonDialogThemeLight).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                selectView(v);
+
+                deselectView(findViewById(R.id.buttonDialogThemeDark));
+
+                dialogTheme = R.style.DialogThemeLight;
+            }
+        });
+
+        findViewById(R.id.buttonDialogThemeDark).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+
+                selectView(v);
+
+                deselectView(findViewById(R.id.buttonDialogThemeLight));
+
+                dialogTheme = R.style.DialogThemeDark;
+            }
+        });
+
+        findViewById(R.id.buttonAuthenticate).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                createFingerprintManagerInstance().authenticate(new KFingerprintManager.AuthenticationCallback() {
+                    @Override
+                    public void onAuthenticationSuccess() {
+                        messageText.setText("Successfully authenticated");
+                    }
+
+                    @Override
+                    public void onSuccessWithManualPassword(@NotNull String password) {
+                        messageText.setText("Manual password: " + password);
+                    }
+
+                    @Override
+                    public void onFingerprintNotRecognized() {
+                        messageText.setText("Fingerprint not recognized");
+                    }
+
+                    @Override
+                    public void onAuthenticationFailedWithHelp(@Nullable String help) {
+                        messageText.setText(help);
+                    }
+
+                    @Override
+                    public void onFingerprintNotAvailable() {
+                        messageText.setText("Fingerprint not available");
+                    }
+
+                    @Override
+                    public void onCancelled() {
+                        messageText.setText("Operation cancelled by user");
+                    }
+                }, getSupportFragmentManager());
+            }
+        });
+
+        encryptButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                messageToDecrypt = encryptionMessageEditText.getText().toString();
+                createFingerprintManagerInstance().encrypt(messageToDecrypt, new KFingerprintManager.EncryptionCallback() {
+                    @Override
+                    public void onEncryptionSuccess(@NotNull String messageEncrypted) {
+                        String message = getString(R.string.encrypt_message_success, messageEncrypted);
+                        messageText.setText(message);
+                        encryptionMessageEditText.setText(messageEncrypted);
+                        encryptButton.setVisibility(View.GONE);
+                        decryptButton.setVisibility(View.VISIBLE);
+                    }
+
+                    @Override
+                    public void onEncryptionFailed() {
+                        messageText.setText("Encryption failed");
+                    }
+
+                    @Override
+                    public void onFingerprintNotRecognized() {
+                        messageText.setText("Fingerprint not recognized");
+                    }
+
+                    @Override
+                    public void onAuthenticationFailedWithHelp(@Nullable String help) {
+                        messageText.setText(help);
+                    }
+
+                    @Override
+                    public void onFingerprintNotAvailable() {
+                        messageText.setText("Fingerprint not available");
+                    }
+
+                    @Override
+                    public void onCancelled() {
+                        messageText.setText("Operation cancelled by user");
+                    }
+                }, getSupportFragmentManager());
+            }
+        });
+
+        decryptButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                messageToDecrypt = encryptionMessageEditText.getText().toString();
+                createFingerprintManagerInstance().decrypt(messageToDecrypt, new KFingerprintManager.DecryptionCallback() {
+                    @Override
+                    public void onDecryptionSuccess(@NotNull String messageDecrypted) {
+                        String message = getString(R.string.decrypt_message_success, messageDecrypted);
+                        messageText.setText(message);
+                        encryptionMessageEditText.setText("");
+                        decryptButton.setVisibility(View.GONE);
+                        encryptButton.setVisibility(View.VISIBLE);
+                    }
+
+                    @Override
+                    public void onDecryptionFailed() {
+                        messageText.setText("Encryption failed");
+                    }
+
+                    @Override
+                    public void onFingerprintNotRecognized() {
+                        messageText.setText("Fingerprint not recognized");
+                    }
+
+                    @Override
+                    public void onAuthenticationFailedWithHelp(@Nullable String help) {
+                        messageText.setText(help);
+                    }
+
+                    @Override
+                    public void onFingerprintNotAvailable() {
+                        messageText.setText("Fingerprint not available");
+                    }
+
+                    @Override
+                    public void onCancelled() {
+                        messageText.setText("Operation cancelled by user");
+                    }
+                }, getSupportFragmentManager());
+            }
+        });
+    }
+
+    private KFingerprintManager createFingerprintManagerInstance() {
+        KFingerprintManager fingerprintManager = new KFingerprintManager(this, KEY);
+        fingerprintManager.setAuthenticationDialogStyle(dialogTheme);
+        return fingerprintManager;
+    }
+
+    private void selectView(View view) {
+        view.setSelected(true);
+        view.setElevation(32f);
+    }
+
+    private void deselectView(View view) {
+        view.setSelected(true);
+        view.setElevation(0f);
+    }
+}

javasample/src/main/res/drawable/dialog_dark_theme_button_background.xml

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+<?xml version="1.0" encoding="utf-8"?>
+
+<selector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:enterFadeDuration="@android:integer/config_shortAnimTime"
+    android:exitFadeDuration="@android:integer/config_shortAnimTime">
+
+    <item android:drawable="@color/dialog_dark_theme_background_selected" android:state_selected="true"/>
+    <item android:drawable="@color/dialog_dark_theme_background"/>
+
+</selector>

javasample/src/main/res/drawable/dialog_light_theme_button_background.xml

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+<?xml version="1.0" encoding="utf-8"?>
+
+<selector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:enterFadeDuration="@android:integer/config_shortAnimTime"
+    android:exitFadeDuration="@android:integer/config_shortAnimTime">
+
+    <item android:drawable="@color/dialog_light_theme_background_selected" android:state_selected="true"/>
+    <item android:drawable="@color/dialog_light_theme_background"/>
+
+</selector>