从手势文件中删除手势

Question

我正在开发一个小的手势应用程序，它创建并保存手势到文件中，并基于安卓示例中的gestureBuilder代码。

我想删除文件中存储的所有手势，代码的移植过程如下所示

private static GestureLibrary sStore;
final GestureLibrary store = sStore;
 if (store.load()) 
                    {
                        for (String name : store.getGestureEntries()) 
                        {
                           for (Gesture gesture : store.getGestures(name)) 
                           {
                                final NamedGesture namedGesture = new NamedGesture();
                                namedGesture.gesture = gesture;
                                namedGesture.name = name;

                                sStore.removeGesture(namedGesture.name, namedGesture.gesture);
                                sStore.save();
                            }
                        }
                    }

但是，在运行时会出现如下异常

03-13 14:42:07.009: E/AndroidRuntime(905)：致命异常: main 03-13 14:42:07.009: E/AndroidRuntime(905)：java.util.HashMap$HashIterator.nextEntry(HashMap.java:796) 03-13 14:42:07.009: E/AndroidRuntime(905)：at java.util.HashMap$KeyIterator.next(HashMap.java:823) 03-13 14:42:07.009: E/AndroidRuntime(905)：at java.util.ConcurrentModificationException 03-13 14:42: 42：07.009: E/AndroidRuntime(905)：at com.likith.gesturebuilder.GestureBuilderActivity$2$1.onClick(GestureBuilderActivity.java:127) 03-13 14:42:07.009: E/AndroidRuntime(905)：at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:159) 03-13 14:42:07.009: E/AndroidRuntime(905)：at android.os.Handler.dispatchMessage(Handler.java:99) 03-13 14:42:07.009: E/AndroidRuntime(905)：at android.os.Looper.loop(Looper.java:123) 03-13 14:42:07.009: E/AndroidRuntime(905)：at java.lang.reflect.Method.invoke(Method.java:507) 03-13 14:42:07.009: E/AndroidRuntime(905)：at android.os.Looper.loop(原生方法) 03-13 14:42:07.009: E/AndroidRuntime(905)：at at 03-13 14:42:07.009: E/AndroidRuntime(905)：at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 03-13 14:42:07.009: E/AndroidRuntime(905)：at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 03-13 14:42:07.009: E/AndroidRuntime(905)：at dalvik.system.NativeStart.main(原生方法)

有没有什么方法可以删除手势文件中的所有手势，请帮助…

Answer 1

1)如果您想要删除所有的手势(条目)，请执行以下操作：

if (store.load()) {
                try {
                    List list = new ArrayList();
                    for (String name : store.getGestureEntries()) {
                        list.add(name);
                    }
                    for (int i = 0; i < list.size(); i++) {
                        store.removeEntry(list.get(i).toString());
                        store.save();
                    }
                }catch (Exception e){
                    System.out.println(e.getMessage());
                }
            }

2)如果您一次只想删除一条条目：

if (store.load()) {
                try {
                    for (String name : store.getGestureEntries()) {
                        if (name.equals("name of the entry you want to delete")) {
                            Gesture gesture = store.getGestures(name).get(0);
                            store.removeGesture(name, gesture);
                            store.save();
                        }
                    }
                }catch (Exception e){
                    System.out.println(e.getMessage());
                }
            }

我希望它能为你工作。