dev

app/build.gradle

@@ -37,7 +37,7 @@ android {
 
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
-    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+//    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
     implementation 'androidx.core:core-ktx:1.3.1'
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'com.google.android.material:material:1.2.1'
@@ -47,6 +47,7 @@ dependencies {
     implementation("com.squareup.okhttp3:okhttp:4.9.3")
     implementation("com.squareup.okhttp3:logging-interceptor:3.9.0")
     implementation("com.squareup.retrofit2:retrofit:2.9.0")
+    implementation("com.google.android.material:material:1.2.0")
     implementation 'androidx.annotation:annotation:1.1.0'
     testImplementation 'junit:junit:4.+'
     implementation 'com.squareup.retrofit2:converter-gson:2.9.0'

app/src/main/java/com/miya/fastcashier/dialog/CodeScanDialog.java

+package com.miya.fastcashier.dialog;
+
+import android.app.Dialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.text.TextUtils;
+import android.view.Gravity;
+import android.view.KeyEvent;
+import android.view.View;
+import android.view.Window;
+import android.view.WindowManager;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import androidx.constraintlayout.widget.Group;
+
+import com.miya.fastcashier.R;
+import com.miya.fastcashier.utils.ScanGunKeyEventHelper;
+
+
+public class CodeScanDialog extends Dialog implements DialogInterface.OnDismissListener {
+
+    private final ScanGunKeyEventHelper scanGunKeyEventHelper;
+    private OnScanListener listener;
+
+    public CodeScanDialog(Context context) {
+        super(context);
+        initWindow();
+        setContentView(R.layout.dialog_code_scan);
+        setCanceledOnTouchOutside(false);
+        setOnDismissListener(this);
+        scanGunKeyEventHelper = new ScanGunKeyEventHelper();
+        scanGunKeyEventHelper.setOnBarCodeCatchListener(barcode -> {
+            if (listener != null) {
+                listener.onScan(barcode);
+            }
+        });
+    }
+
+    @Override
+    public boolean dispatchKeyEvent(KeyEvent event) {
+        scanGunKeyEventHelper.analysisKeyEvent(event);
+        return true;
+    }
+
+    private void initWindow() {
+        Window win = this.getWindow();
+        win.getDecorView().setPadding(0, 0, 0, 0);
+        WindowManager.LayoutParams lp = win.getAttributes();
+        lp.width = WindowManager.LayoutParams.MATCH_PARENT;
+        lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
+        lp.gravity = Gravity.BOTTOM;
+        lp.windowAnimations = R.style.BottomInAndOutStyle;
+        win.setAttributes(lp);
+        win.setBackgroundDrawableResource(android.R.color.transparent);
+    }
+
+    public void setOnScanListener(OnScanListener listener) {
+        this.listener = listener;
+    }
+
+    @Override
+    public void onDismiss(DialogInterface dialogInterface) {
+        if (scanGunKeyEventHelper != null) {
+            scanGunKeyEventHelper.onDestroy();
+        }
+    }
+
+    public interface OnScanListener {
+        void onScan(String result);
+    }
+}

app/src/main/java/com/miya/fastcashier/ui/main/MainActivity.kt

@@ -4,18 +4,22 @@ import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
 import androidx.lifecycle.ViewModelProvider
 import com.miya.fastcashier.R
-import com.miya.fastcashier.viewmodel.MainViewModel
+import com.miya.fastcashier.dialog.CodeScanDialog
+import com.miya.fastcashier.viewmodel.PayViewModel
 
 class MainActivity : AppCompatActivity() {
 
-    private lateinit var viewModel: MainViewModel
+    private lateinit var viewModel: PayViewModel
+    private lateinit var scanDialog: CodeScanDialog
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.main_activity)
-        viewModel = ViewModelProvider(this).get(MainViewModel::class.java)
-
-
+        setContentView(R.layout.activity_main)
+        viewModel = ViewModelProvider(this).get(PayViewModel::class.java)
+        scanDialog = CodeScanDialog(this);
 
+        scanDialog.setOnScanListener {
+            viewModel.
+        }
     }
 }
\ No newline at end of file

app/src/main/java/com/miya/fastcashier/utils/ScanGunKeyEventHelper.java

+package com.miya.fastcashier.utils;
+
+import android.os.Handler;
+import android.text.TextUtils;
+import android.view.KeyEvent;
+
+
+/**
+ * 扫码枪解码器
+ * Created by fengyu on 2018/1/12.
+ */
+
+public class ScanGunKeyEventHelper {
+
+    //延迟500ms，判断扫码是否完成。
+    private final static long MESSAGE_DELAY = 500;
+    //扫码内容
+    private final StringBuffer mStringBufferResult = new StringBuffer();
+    //大小写区分
+    private boolean mCaps;
+    private OnScanSuccessListener mOnScanSuccessListener;
+    private final Handler mHandler = new Handler();
+
+    private final Runnable mScanningFishedRunnable = new Runnable() {
+        @Override
+        public void run() {
+            performScanSuccess();
+        }
+    };
+
+    //返回扫描结果
+    private void performScanSuccess() {
+        String barcode = mStringBufferResult.toString();
+        if (mOnScanSuccessListener != null && !TextUtils.isEmpty(barcode))
+            mOnScanSuccessListener.onScanSuccess(barcode);
+        mStringBufferResult.setLength(0);
+    }
+
+    //key事件处理
+    public void analysisKeyEvent(KeyEvent event) {
+
+        int keyCode = event.getKeyCode();
+
+        //字母大小写判断
+        checkLetterStatus(event);
+
+        if (event.getAction() == KeyEvent.ACTION_DOWN) {
+
+            char aChar = getInputCode(event);
+            if (keyCode == KeyEvent.KEYCODE_ENTER) {
+                //若为回车键，直接返回
+                mHandler.removeCallbacks(mScanningFishedRunnable);
+                mHandler.post(mScanningFishedRunnable);
+            } else {
+                if (aChar != 0) {
+                    mStringBufferResult.append(aChar);
+                }
+                //延迟post，若500ms内，有其他事件
+                mHandler.removeCallbacks(mScanningFishedRunnable);
+                mHandler.postDelayed(mScanningFishedRunnable, MESSAGE_DELAY);
+            }
+
+        }
+    }
+
+    //检查shift键
+    private void checkLetterStatus(KeyEvent event) {
+        int keyCode = event.getKeyCode();
+        if (keyCode == KeyEvent.KEYCODE_SHIFT_RIGHT || keyCode == KeyEvent.KEYCODE_SHIFT_LEFT) {
+            if (event.getAction() == KeyEvent.ACTION_DOWN) {
+                //按着shift键，表示大写
+                mCaps = true;
+            } else {
+                //松开shift键，表示小写
+                mCaps = false;
+            }
+        }
+    }
+
+
+    //获取扫描内容
+    private char getInputCode(KeyEvent event) {
+
+        int keyCode = event.getKeyCode();
+
+        char aChar;
+
+        if (keyCode >= KeyEvent.KEYCODE_A && keyCode <= KeyEvent.KEYCODE_Z) {
+            //字母
+            aChar = (char) ((mCaps ? 'A' : 'a') + keyCode - KeyEvent.KEYCODE_A);
+        } else if (keyCode >= KeyEvent.KEYCODE_0 && keyCode <= KeyEvent.KEYCODE_9) {
+            //数字
+            aChar = (char) ('0' + keyCode - KeyEvent.KEYCODE_0);
+        } else {
+            //其他符号
+            switch (keyCode) {
+                case KeyEvent.KEYCODE_PERIOD:
+                    aChar = '.';
+                    break;
+                case KeyEvent.KEYCODE_MINUS:
+                    aChar = mCaps ? '_' : '-';
+                    break;
+                case KeyEvent.KEYCODE_SLASH:
+                    aChar = '/';
+                    break;
+                case KeyEvent.KEYCODE_BACKSLASH:
+                    aChar = mCaps ? '|' : '\\';
+                    break;
+                default:
+                    aChar = 0;
+                    break;
+            }
+        }
+
+        return aChar;
+
+    }
+
+
+    public interface OnScanSuccessListener {
+        public void onScanSuccess(String barcode);
+    }
+
+    public void setOnBarCodeCatchListener(OnScanSuccessListener onScanSuccessListener) {
+        mOnScanSuccessListener = onScanSuccessListener;
+    }
+
+    public void onDestroy() {
+        mHandler.removeCallbacks(mScanningFishedRunnable);
+        mOnScanSuccessListener = null;
+    }
+}

app/src/main/java/com/miya/fastcashier/viewmodel/MainViewModel.kt

 package com.miya.fastcashier.viewmodel
 
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.miya.fastcashier.beans.LoginRequest
+import com.miya.fastcashier.service.LoginService
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.async
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+
+class PayViewModel : ViewModel() {
+
+    fun refund(userName:String,passWord:String) {
+        viewModelScope.launch {
+            val refundResult = async(Dispatchers.IO) {
+                booksRepository.getAllBooks()
+            }
+
+            refundResult,
+        }
+    }
+
+
 
-class MainViewModel : ViewModel() {
-    // TODO: Implement the ViewModel
 }
\ No newline at end of file

app/src/main/res/anim/in_bottom.xml

+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate
+        android:duration="300"
+        android:fromYDelta="100%p"
+        android:toYDelta="0"/>
+</set>
+

app/src/main/res/anim/in_right.xml

+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate
+        android:duration="300"
+        android:fromXDelta="100%p"
+        android:toXDelta="0"/>
+</set>
+

app/src/main/res/anim/out_bottom.xml

+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate
+        android:duration="300"
+        android:fromYDelta="0"
+        android:toYDelta="100%p"/>
+</set>
+

app/src/main/res/anim/out_left.xml

+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate
+        android:duration="300"
+        android:fromXDelta="0"
+        android:toXDelta="-100%p"/>
+</set>
+

app/src/main/res/layout/dialog_code_scan.xml

+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <TextView
+        android:id="@+id/tvRefund"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="请扫码退款"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.498"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.258" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file

app/src/main/res/values/styles.xml

+<resources>
+    <style name="BottomInAndOutStyle">
+        <item name="android:windowEnterAnimation">@anim/in_bottom</item>
+        <item name="android:windowExitAnimation">@anim/out_bottom</item>
+    </style>
+</resources>

settings.gradle

 rootProject.name = "MiYaFastCashier"
 include ':app'
+include ':core'