新增labelTextWidth

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

@@ -13,6 +13,7 @@
         android:id="@+id/viewfinderView"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        app:labelTextWidth="180dp"
         app:labelText="@string/tips_scan_code"
         app:labelTextSize="@dimen/size_14sp"
         app:laserColor="@color/colorAccent"

lib/src/main/java/com/king/zxing/ViewfinderView.java

@@ -95,6 +95,10 @@ public class ViewfinderView extends View {
      * 提示文本与扫码框的边距
      */
     private float labelTextPadding;
+    /**
+     * 提示文本的宽度
+     */
+    private int labelTextWidth;
     /**
      * 提示文本的位置
      */
@@ -288,6 +292,7 @@ public class ViewfinderView extends View {
         labelTextColor = array.getColor(R.styleable.ViewfinderView_labelTextColor, ContextCompat.getColor(context,R.color.viewfinder_text_color));
         labelTextSize = array.getDimension(R.styleable.ViewfinderView_labelTextSize, TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,14f,getResources().getDisplayMetrics()));
         labelTextPadding = array.getDimension(R.styleable.ViewfinderView_labelTextPadding,TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,24,getResources().getDisplayMetrics()));
+        labelTextWidth = array.getDimensionPixelSize(R.styleable.ViewfinderView_labelTextWidth,0);
         labelTextLocation = TextLocation.getFromInt(array.getInt(R.styleable.ViewfinderView_labelTextLocation,0));
 
 //        isShowResultPoint = array.getBoolean(R.styleable.ViewfinderView_showResultPoint,false);
@@ -361,6 +366,10 @@ public class ViewfinderView extends View {
             frameHeight = size;
         }
 
+        if(labelTextWidth <= 0){
+            labelTextWidth = width - getPaddingLeft() - getPaddingRight();
+        }
+
         float leftOffsets = (width - frameWidth) / 2 + framePaddingLeft - framePaddingRight;
         float topOffsets = (height - frameHeight) / 2 + framePaddingTop - framePaddingBottom;
         switch (frameGravity){
@@ -420,7 +429,7 @@ public class ViewfinderView extends View {
             textPaint.setColor(labelTextColor);
             textPaint.setTextSize(labelTextSize);
             textPaint.setTextAlign(Paint.Align.CENTER);
-            StaticLayout staticLayout = new StaticLayout(labelText,textPaint,canvas.getWidth(), Layout.Alignment.ALIGN_NORMAL,1.0f,0.0f,true);
+            StaticLayout staticLayout = new StaticLayout(labelText,textPaint,labelTextWidth, Layout.Alignment.ALIGN_NORMAL,1.2f,0.0f,true);
             if(labelTextLocation == TextLocation.BOTTOM){
                 canvas.translate(frame.left + frame.width() / 2,frame.bottom + labelTextPadding);
             }else{

lib/src/main/res/values/attrs.xml

@@ -8,6 +8,7 @@
         <attr name="labelTextColor" format="color"/>
         <attr name="labelTextSize" format="dimension"/>
         <attr name="labelTextPadding" format="dimension"/>
+        <attr name="labelTextWidth" format="dimension"/>
         <attr name="labelTextLocation" format="enum">
             <enum name="top" value="0"/>
             <enum name="bottom" value="1"/>