first commit.

utils/.gitignore

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+/build

utils/build.gradle

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+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion 29
+
+    defaultConfig {
+        minSdkVersion 18
+        targetSdkVersion 29
+        versionCode 1
+        versionName "1.0"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'androidx.appcompat:appcompat:1.0.2'
+
+    testImplementation 'junit:junit:4.13-beta-3'
+    androidTestImplementation 'androidx.test:runner:1.2.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+}

utils/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# 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

utils/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="cn.dxl.common">
+
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.NFC" />
+    <uses-permission android:name="android.permission.VIBRATE" />
+
+    <application>
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.fileprovider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths" />
+
+        </provider>
+
+        <!--APP重启服务-->
+        <service
+            android:name="cn.dxl.common.services.RestartService"
+            android:enabled="true"
+            android:process=":restart" />
+
+        <activity android:name="cn.dxl.common.activities.CrashActivity" />
+
+    </application>
+
+</manifest>

utils/src/main/java/cn/dxl/common/activities/CrashActivity.java

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+package cn.dxl.common.activities;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.os.Process;
+import androidx.annotation.Nullable;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import cn.dxl.common.R;
+
+
+/**
+ * show throwable!
+ */
+public class CrashActivity extends Activity {
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.act_crash_main);
+
+        TextView txtShowMsg = findViewById(R.id.txtView_showMsg);
+
+        //接收意图中序列化过来的Throwable对象
+        Throwable t = (Throwable) getIntent().getSerializableExtra("crash");
+        if (t == null) {
+            Toast.makeText(this, "接收到的异常对象为空!", Toast.LENGTH_SHORT).show();
+        } else {
+            StringBuilder msg = new StringBuilder();
+            msg.append(t.getLocalizedMessage()).append('\n');
+            for (StackTraceElement st : t.getStackTrace()) {
+                msg.append('\n');
+                msg.append("at: ");
+                msg.append(st.toString());
+            }
+            txtShowMsg.setText(msg);
+        }
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        //终止虚拟机的执行
+        finish();
+        Process.killProcess(Process.myPid());
+        System.exit(0);
+    }
+}

utils/src/main/java/cn/dxl/common/application/App.java

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+package cn.dxl.common.application;
+
+import android.app.Application;
+import android.content.Context;
+
+import cn.dxl.common.util.AppUtil;
+import cn.dxl.common.util.CrashUtil;
+
+public class App extends Application {
+
+    public interface ApplicationCallback {
+        Context onAttachBaseContext(Context context);
+    }
+
+    public ApplicationCallback getCallback() {
+        return callback;
+    }
+
+    public void setCallback(ApplicationCallback callback) {
+        this.callback = callback;
+    }
+
+    private ApplicationCallback callback;
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        //异常处理
+        CrashUtil.register(this);
+        //全局context，app环境缓存!
+        AppUtil.register(this);
+    }
+
+    @Override
+    protected void attachBaseContext(Context base) {
+        super.attachBaseContext(callback != null ? callback.onAttachBaseContext(base) : base);
+    }
+}

utils/src/main/java/cn/dxl/common/implement/AnimationListenerImpl.java

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+package cn.dxl.common.implement;
+
+import android.view.animation.Animation;
+
+public class AnimationListenerImpl implements Animation.AnimationListener {
+    @Override
+    public void onAnimationStart(Animation animation) {
+
+    }
+
+    @Override
+    public void onAnimationEnd(Animation animation) {
+
+    }
+
+    @Override
+    public void onAnimationRepeat(Animation animation) {
+
+    }
+}

utils/src/main/java/cn/dxl/common/implement/DialogOnclickListenerImpl.java

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+package cn.dxl.common.implement;
+
+import android.content.DialogInterface;
+
+public class DialogOnclickListenerImpl implements DialogInterface.OnClickListener {
+    @Override
+    public void onClick(DialogInterface dialogInterface, int i) {
+
+    }
+}

utils/src/main/java/cn/dxl/common/implement/ItemSelectedListenerImpl.java

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+package cn.dxl.common.implement;
+
+import android.view.View;
+import android.widget.AdapterView;
+
+public class ItemSelectedListenerImpl
+        implements AdapterView.OnItemSelectedListener {
+    @Override
+    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+
+    }
+
+    @Override
+    public void onNothingSelected(AdapterView<?> parent) {
+
+    }
+}

utils/src/main/java/cn/dxl/common/implement/OnPageChangeListenerImpl.java

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+package cn.dxl.common.implement;
+
+import androidx.viewpager.widget.ViewPager;
+
+public class OnPageChangeListenerImpl implements ViewPager.OnPageChangeListener {
+    @Override
+    public void onPageScrolled(int i, float v, int i1) {
+
+    }
+
+    @Override
+    public void onPageSelected(int i) {
+
+    }
+
+    @Override
+    public void onPageScrollStateChanged(int i) {
+
+    }
+}

utils/src/main/java/cn/dxl/common/implement/PermissionCallback.java

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+package cn.dxl.common.implement;
+
+import cn.dxl.common.util.PermissionUtil;
+
+public class PermissionCallback implements PermissionUtil.Callback {
+    @Override
+    public void onStartChecks(PermissionUtil util) {
+
+    }
+
+    @Override
+    public void onPermissionLose(PermissionUtil util) {
+
+    }
+
+    @Override
+    public void onPermissionNormal(PermissionUtil util) {
+
+    }
+
+    @Override
+    public void whatPermissionLose(String per, PermissionUtil util) {
+
+    }
+
+    @Override
+    public void onEndChecks() {
+
+    }
+}

utils/src/main/java/cn/dxl/common/interfaces/OnTouchListener.java

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+package cn.dxl.common.interfaces;
+
+import android.view.MotionEvent;
+
+/*
+ * 在触发时的回调!
+ * */
+public interface OnTouchListener {
+    boolean onTouch(MotionEvent event);
+}

utils/src/main/java/cn/dxl/common/interfaces/RegexCommon.java

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+package cn.dxl.common.interfaces;
+
+public interface RegexCommon {
+
+    //邮箱匹配规则!
+    String email = "[\\w!#$%&'*+/=?^_`{|}~-]+(?:\\.[\\w!#$%&'*+/=?^_`{|}~-]+)*@(?:[\\w](?:[\\w-]*[\\w])?\\.)+[\\w](?:[\\w-]*[\\w])?";
+}

utils/src/main/java/cn/dxl/common/posixio/Communication.java

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+package cn.dxl.common.posixio;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.io.Serializable;
+
+/*
+ * author DXL
+ * 通信接口，实现了必要的元素传递以及通信实现规定
+ */
+public interface Communication extends Serializable, Closeable {
+
+    /**
+     * @param sendMsg data buffer, transfer data from here.
+     * @param offset  the data from buffer valid offset.
+     * @param length  the data length from buffer,buffer may be 1024bytes, but valid data length is 512bytes.
+     * @param timeout if write need timeout, use me.
+     * @return the length of write finished.
+     * @throws IOException throw a IOException if have some problem.
+     */
+    int write(byte[] sendMsg, int offset, int length, int timeout) throws IOException;
+
+    /**
+     * @param recvMsg data buffer, read data to here.
+     * @param offset  read data to buffer from offset started.
+     * @param length  the length of data need read.
+     * @param timeout if read need timeout at data length no enough, use me.
+     * @return the length of read finished.
+     * @throws IOException throw a IOException if have some problem.
+     */
+    int read(byte[] recvMsg, int offset, int length, int timeout) throws IOException;
+
+    /**
+     * flush outputstream.
+     *
+     * @throws IOException throw a IOException if have some problem.
+     */
+    void flush() throws IOException;
+
+    /**
+     * close io stream
+     *
+     * @throws IOException throw a IOException if have some problem.
+     */
+    void close() throws IOException;
+}

utils/src/main/java/cn/dxl/common/services/RestartService.java

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+package cn.dxl.common.services;
+
+import android.app.Service;
+import android.content.Intent;
+import android.os.Handler;
+import android.os.IBinder;
+import androidx.annotation.Nullable;
+
+public class RestartService extends Service {
+
+    private static final String LOG_TAG = RestartService.class.getSimpleName();
+    private Handler handler;
+    private String PackageName;
+
+    public RestartService() {
+        handler = new Handler();
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        /*
+         * 关闭应用后多久重新启动
+         */
+        long stopDelayed = intent.getLongExtra("Delayed", 2000);
+        PackageName = intent.getStringExtra("PackageName");
+        handler.postDelayed(new Runnable() {
+            @Override
+            public void run() {
+                Intent LaunchIntent = RestartService.this.getPackageManager().getLaunchIntentForPackage(PackageName);
+                RestartService.this.startActivity(LaunchIntent);
+                RestartService.this.stopSelf();
+            }
+        }, stopDelayed);
+        return super.onStartCommand(intent, flags, startId);
+    }
+
+    @Nullable
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+}

utils/src/main/java/cn/dxl/common/util/AesUtils.java

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+package cn.dxl.common.util;
+
+import javax.crypto.*;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+
+import java.io.UnsupportedEncodingException;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+import java.util.Base64;
+
+/**
+ * AES 加密方法，是对称的密码算法(加密与解密的密钥一致)，这里使用最大的 256 位的密钥
+ */
+public class AesUtils {
+
+    private static final int size = 128;
+
+    /**
+     * 获得一个 密钥长度为 256 位的 AES 密钥，
+     *
+     * @return 返回经 BASE64 处理之后的密钥字符串
+     */
+    public static byte[] getStrKeyAES() throws NoSuchAlgorithmException, UnsupportedEncodingException {
+        KeyGenerator keyGen = KeyGenerator.getInstance("AES");
+        SecureRandom secureRandom = new SecureRandom(String.valueOf(System.currentTimeMillis()).getBytes(Charset.forName("UTF-8")));
+        keyGen.init(size, secureRandom);   // 这里可以是 128、192、256、越大越安全
+        SecretKey secretKey = keyGen.generateKey();
+        return secretKey.getEncoded();
+    }
+
+    /**
+     * 将使用 原生的类型byte的数组 secretKey 转为 SecretKey
+     *
+     * @param keyBytes raw key byte.
+     * @return SecretKey
+     */
+    public static SecretKey strKey2SecretKey(byte[] keyBytes) {
+        return new SecretKeySpec(keyBytes, "AES");
+    }
+
+    /**
+     * 将使用 byte 类型的 secretKey 转为 SecretKey
+     *
+     * @param bytesKey
+     * @return SecretKey
+     */
+    public static SecretKey bytesKey2SecretKey(byte[] bytesKey) {
+        return new SecretKeySpec(bytesKey, "AES");
+    }
+
+    /**
+     * 加密
+     *
+     * @param content   待加密内容
+     * @param secretKey 加密使用的 AES 密钥
+     * @return 加密后的密文 byte[]
+     */
+    public static byte[] encryptAES(byte[] content, SecretKey secretKey)
+            throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException {
+        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
+        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
+        return cipher.doFinal(content);
+    }
+
+    /**
+     * 解密
+     *
+     * @param content   待解密内容
+     * @param secretKey 解密使用的 AES 密钥
+     * @return 解密后的明文 byte[]
+     */
+    public static byte[] decryptAES(byte[] content, SecretKey secretKey)
+            throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException {
+        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
+        cipher.init(Cipher.DECRYPT_MODE, secretKey);
+        return cipher.doFinal(content);
+    }
+
+}

utils/src/main/java/cn/dxl/common/util/AppUtil.java

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+package cn.dxl.common.util;
+
+import android.app.Activity;
+import android.app.Application;
+
+import cn.dxl.common.application.App;
+
+public class AppUtil {
+    private static AppUtil thiz = null;
+    private static App app;
+
+    private AppUtil() {
+    }
+
+    public static AppUtil getInstance() {
+        if (thiz == null) {
+            thiz = new AppUtil();
+        }
+        return thiz;
+    }
+
+    public static void register(App app) {
+        AppUtil.app = app;
+    }
+
+    public App getApp() {
+        return app;
+    }
+
+    public void finishAll() {
+        for (Activity activity : CrashUtil.activities) {
+            activity.finish();
+        }
+    }
+}

utils/src/main/java/cn/dxl/common/util/AssetsUtil.java

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+package cn.dxl.common.util;
+
+import android.content.Context;
+import android.content.res.AssetManager;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+/*
+ * 针对Assets进行操作的类!
+ * */
+public class AssetsUtil {
+
+    private Context context;
+
+    public AssetsUtil(Context context) {
+        this.context = context;
+    }
+
+    //判断assets文件是否存在!
+    public boolean isFileExists(String fileName) {
+        InputStream is = null;
+        boolean ret = false;
+        try {
+            is = context.getResources().getAssets().open(fileName);
+            ret = true;
+        } catch (IOException e) {
+            e.printStackTrace();
+        } finally {
+            try {
+                if (is != null)
+                    is.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+        return ret;
+    }
+
+    //得到assets指定目录下的所有文件!
+    public String[] getFiles(String root) {
+        String[] files = new String[0];
+        try {
+            files = context.getAssets().list(root);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        if (files == null || files.length == 0) return null;
+        return files;
+    }
+
+    //移动assets中的文件到指定目录
+    public boolean moveFile(String asFile, String targetPath) {
+        File file = new File(targetPath);
+        if (!file.exists() || !file.isFile()) {
+            try {
+                if (!file.createNewFile()) {
+                    return false;
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+                return false;
+            }
+        }
+        boolean ret = false;
+        //移动默认key文件
+        AssetManager am = context.getResources().getAssets();
+        InputStream is = null;
+        FileOutputStream fos = null;
+        try {
+            is = am.open(asFile);
+            fos = new FileOutputStream(file);
+            int len = is.available();
+            for (int i = 0; i < len; ++i) {
+                fos.write((byte) is.read());
+            }
+            ret = true;
+        } catch (IOException e) {
+            e.printStackTrace();
+            try {
+                if (is != null) is.close();
+                if (fos != null) fos.close();
+                ret = false;
+            } catch (IOException e1) {
+                e1.printStackTrace();
+            }
+        } finally {
+            try {
+                if (is != null) is.close();
+                if (fos != null) fos.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+        return ret;
+    }
+}

utils/src/main/java/cn/dxl/common/util/CRC16.java

@@ -0,0 +1,66 @@
+package cn.dxl.common.util;
+
+/**
+ * crc16多项式算法
+ *
+ * @author eguid
+ */
+public class CRC16 {
+
+    /**
+     * CRC16-XMODEM算法（四字节）
+     *
+     * @param bytes
+     * @return
+     */
+    public static int crc16_ccitt_xmodem(byte[] bytes) {
+        return crc16_ccitt_xmodem(bytes, 0, bytes.length);
+    }
+
+    /**
+     * CRC16-XMODEM算法（四字节）
+     *
+     * @param bytes
+     * @param offset
+     * @param count
+     * @return
+     */
+    public static int crc16_ccitt_xmodem(byte[] bytes, int offset, int count) {
+        int crc = 0x0000; // initial value
+        int polynomial = 0x1021; // poly value
+        for (int index = offset; index < count; index++) {
+            byte b = bytes[index];
+            for (int i = 0; i < 8; i++) {
+                boolean bit = ((b >> (7 - i) & 1) == 1);
+                boolean c15 = ((crc >> 15 & 1) == 1);
+                crc <<= 1;
+                if (c15 ^ bit)
+                    crc ^= polynomial;
+            }
+        }
+        crc &= 0xffff;
+        return crc;
+    }
+
+    /**
+     * CRC16-XMODEM算法（两字节）
+     *
+     * @param bytes
+     * @param offset
+     * @param count
+     * @return
+     */
+    public static short crc16_ccitt_xmodem_short(byte[] bytes, int offset, int count) {
+        return (short) crc16_ccitt_xmodem(bytes, offset, count);
+    }
+
+    /**
+     * CRC16-XMODEM算法（两字节）
+     *
+     * @param bytes
+     */
+    public static short crc16_ccitt_xmodem_short(byte[] bytes) {
+        return crc16_ccitt_xmodem_short(bytes, 0, bytes.length);
+    }
+
+}

utils/src/main/java/cn/dxl/common/util/Checksum.java

@@ -0,0 +1,20 @@
+package cn.dxl.common.util;
+
+public class Checksum {
+    /**
+     * Calculates the checksum of the passed byte buffer.
+     *
+     * @param buffer
+     * @param byteCount
+     * @return byte checksum value
+     */
+    public static byte calcChecksum(byte[] buffer, int byteCount) {
+        byte checksum = 0;
+        int bufPos = 0;
+        while (byteCount-- != 0) {
+            checksum += buffer[bufPos++];
+        }
+        return checksum;
+    }
+
+}