需要獲取按下時候的坐標和松開時候的坐標，并將兩者進行比較。

①MainAbilitySlice.java文件

可以根據使用情況做修改代碼中判斷處的限制偏差范圍。

package com.example.yeman.slice;import com.example.yeman.ResourceTable; import ohos.aafwk.ability.AbilitySlice; import ohos.aafwk.content.Intent; import ohos.agp.components.Button; import ohos.agp.components.Component; import ohos.agp.components.DirectionalLayout; import ohos.agp.components.Text; import ohos.media.image.common.Position; import ohos.multimodalinput.event.MmiPoint; import ohos.multimodalinput.event.TouchEvent;public class MainAbilitySlice extends AbilitySlice implements Component.TouchEventListener{float starX;float starY;float endX;float endY;Text txt;@Overridepublic void onStart(Intent intent) {super.onStart(intent);super.setUIContent(ResourceTable.Layout_ability_main);//通過id找到布局對象（其也可以理解是一種組件）DirectionalLayout dl = (DirectionalLayout) findComponentById(ResourceTable.Id_dl);//通過id找到文本框組件txt = (Text) findComponentById(ResourceTable.Id_txt);//給整個布局添加滑動事件，當在整個布局上滑動時，就會不斷調用本類中onTouchEvent方法dl.setTouchEventListener(this);}@Overridepublic void onActive() {super.onActive();}@Overridepublic void onForeground(Intent intent) {super.onForeground(intent);}@Overridepublic boolean onTouchEvent(Component component, TouchEvent touchEvent) {//component表示滑動的哪個組件，布局也是一種組件，實際上這里示例就是在整個布局上進行的。//touchEvent表示動作對象（按下，滑動，抬起）。//獲取當前手指對于屏幕進行的操作（按下，滑動，抬起）int action = touchEvent.getAction(); //1表示按下，2表示抬起，3表示滑動（移動）if (action == TouchEvent.PRIMARY_POINT_DOWN){MmiPoint position = touchEvent.getPointerPosition(0);starX = position.getX();starY = position.getY();txt.setText(starX + "--" + starY);}else if (action == TouchEvent.PRIMARY_POINT_UP){MmiPoint position = touchEvent.getPointerPosition(0);endX = position.getX();endY = position.getY();txt.setText(endX + "--" + endY);//Math.abs(starY - endY) < 100是做一個Y方向的限定范圍，下面類似。if (starX > endX && Math.abs(starY - endY) < 100){txt.setText("左滑了");}else if (starX < endX && Math.abs(starY - endY) < 100){txt.setText("右滑了");}else if (starY > endY && Math.abs(starX - endX) < 100){txt.setText("上滑了");}else if (starY < endY && Math.abs(starX - endX) < 100){txt.setText("下滑了");}else txt.setText("無效滑動（請直一點！）");}else if (action == TouchEvent.POINT_MOVE){txt.setText("滑動中...");}return true;} }

②ability _main.xml文件

<?xml version="1.0" encoding="utf-8"?> <DirectionalLayoutohos:id="$+id:dl"xmlns:ohos="http://schemas.huawei.com/res/ohos"ohos:height="match_parent"ohos:width="match_parent"ohos:alignment="center"ohos:orientation="vertical"><Textohos:id="$+id:txt"ohos:height="match_content"ohos:width="match_content"ohos:text="這里是文本框"ohos:text_size="100"/></DirectionalLayout>

總結

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