add restore() method

Author: zaaach

LineMatchingView/build.gradle

@@ -8,8 +8,8 @@ android {
     defaultConfig {
         minSdk 16
         targetSdk 30
-        versionCode 1
-        versionName "1.0"
+        versionCode 2
+        versionName "1.1"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFiles "consumer-rules.pro"

LineMatchingView/src/main/java/com/zaaach/linematchingview/LineMatchingView.java

@@ -83,9 +83,34 @@ public LineMatchingView<T> init(@NonNull LinkableAdapter<T> adapter){
         return this;
     }
 
+    public void restore(){
+        finished = false;
+        oldLines.addAll(newLines);
+        newLines.clear();
+        invalidate();
+        if (leftItems != null){
+            for (int i = 0; i < leftItems.size(); i++) {
+                leftItems.get(i).lined = false;
+                leftItems.get(i).line = null;
+                notifyItemStateChanged(i, NORMAL, true);
+            }
+        }
+        if (rightItems != null){
+            for (int i = 0; i < rightItems.size(); i++) {
+                rightItems.get(i).lined = false;
+                rightItems.get(i).line = null;
+                notifyItemStateChanged(i, NORMAL, false);
+            }
+        }
+    }
+
+    public boolean isFinished(){
+        return finished;
+    }
+
     public void setItems(@NonNull List<T> left, @NonNull List<T> right){
         if (linkableAdapter == null) {
-            throw new IllegalStateException("LinkableAdapter must not be null, please see method setLinkableAdapter()");
+            throw new IllegalStateException("LinkableAdapter must not be null, please see method init()");
         }
         leftItems = new ArrayList<>();
         rightItems = new ArrayList<>();

app/build.gradle

@@ -9,8 +9,8 @@ android {
         applicationId "com.zaaach.demo"
         minSdk 16
         targetSdk 30
-        versionCode 1
-        versionName "1.0"
+        versionCode 2
+        versionName "1.1"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }

app/src/main/java/com/zaaach/demo/MainActivity.java

@@ -7,8 +7,10 @@
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.Button;
 import android.widget.ImageView;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import com.zaaach.linematchingview.LineMatchingView;
 
@@ -24,6 +26,17 @@ protected void onCreate(Bundle savedInstanceState) {
         setContentView(R.layout.activity_main);
 
         lineMatchingView = findViewById(R.id.line_matching_view);
+        Button btnRetry = findViewById(R.id.btn_retry);
+        btnRetry.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (lineMatchingView.isFinished()){
+                    lineMatchingView.restore();
+                }else {
+                    Toast.makeText(MainActivity.this, "连线未完成", Toast.LENGTH_SHORT).show();
+                }
+            }
+        });
 
         List<ItemInfo> left = new ArrayList<>();
         left.add(new ItemInfo(ItemInfo.TEXT, "草莓"));

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

@@ -5,6 +5,7 @@
     android:layout_height="match_parent"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:gravity="center"
+    android:orientation="vertical"
     tools:context=".MainActivity">
 
     <com.zaaach.linematchingview.LineMatchingView
@@ -22,4 +23,11 @@
         app:lmv_line_color_correct="@color/correct_color"
         app:lmv_line_color_error="@color/error_color"/>
 
+    <Button
+        android:id="@+id/btn_retry"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="重做"/>
+
 </LinearLayout>