add reset button

Author: venshine

.idea/misc.xml

@@ -122,7 +122,16 @@ public void print(String msg, String color, boolean bold) {
     public void clear(View v) {
         mBuilder.delete(0, mBuilder.length());
         mTextView.setText("");
+    }
+
+    /**
+     * 重置
+     *
+     * @param v
+     */
+    public void reset(View v) {
         mDrawImageView.setVisibility(View.GONE);
         mDrawTextView.setVisibility(View.VISIBLE);
+        clear(v);
     }
 }

app/src/main/java/com/wx/multiwindow/Activity2.java

@@ -11,6 +11,14 @@
         android:layout_height="wrap_content"
         android:orientation="vertical">
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_margin="5dp"
+            android:gravity="center"
+            android:onClick="reset"
+            android:text="重置" />
+
         <Button
             android:layout_width="match_parent"
             android:layout_height="wrap_content"