大佬教程收集整理的这篇文章主要介绍了Android实现ListView左右滑动删除和编辑,大佬教程大佬觉得挺不错的,现在分享给大家,也给大家做个参考。
有时候,为了实现项目中的需求,完成设计好的用户交互体验,不的不把这些View重新改造成自己想要的效果。
Android原生的ListView是不支持左右滑动的,但是看到微信电话本上,联系人可以左右滑动进行操作的,就通过自己的设想和思路,并加以实现了。
思路:
1.获取到手指放到屏幕时的x,y位置,并判断点击的处于ListView的那个position。
2.判断滑动的方向,如果是上下方向,touch事件就交给ListView处理;如果是左右方向,就禁止ListView进行滑动。
3.根据手指的移动,来移动选中的View。
4.滑动结束后,把View归位。
5.通过传入的监听器,告诉用户是左滑动还是右滑动。
效果图:
重新的ListView的代码:
package com.example.wz.view; import android.Annotation.SuppressLint; import android.content.Context; import android.os.Handler; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.VeLocityTracker; import android.view.View; import android.view.ViewConfiguration; import android.view.WindowManager; import android.widget.AdapterView; import android.widget.ListView; import android.widget.TextView; import com.example.wz.R; import com.example.wz.util.MyLog; import com.example.wz.util.openLooper; import com.example.wz.util.openLooper.LoopCallBACk; public class MyListView extends ListView { public MyLog log = new MyLog(this,truE); public float screenWidth; public int mTouchSlop; public float density; public MyListView(Context context) { super(context); } public MyListView(Context context,AttributeSet attrs) { this(context,attrs,0); } public float transleteSpeed = 2f; public OpenLooper openLooper = null; public LoopCallBACk loopCallBACk = null; @SuppressWarnings("deprecation") public MyListView(Context context,AttributeSet attrs,int defStylE) { super(context,defStylE); this.screenWidth = ((WindowManager) context.getSystemservice(Context.WINDOW_serviCE)).getDefaultDisplay().getWidth(); this.mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop(); this.density = context.getresources().getDisplaymetrics().density; this.openLooper = new openLooper(); this.openLooper.createOpenLooper(); this.loopCallBACk = new ListLoopCallBACk(this.openLooper); this.openLooper.loopCallBACk = this.loopCallBACk; } public class BodyStatus { public int None = 0,Down = 1,Move = 2,Up = 3,Homing = 4; int state = None; } public BodyStatus bodyStatus = new BodyStatus(); public class RemoveDirection { public int None = 0,Left = 1,Right = 2,Homing_Left = 3,Homing_Right = 4; public int state = None; } public RemoveDirection removeDirection = new RemoveDirection(); public class ListLoopCallBACk extends LoopCallBACk { public ListLoopCallBACk(OpenLooper openLooper) { openLooper.super(); } @Override public void loop(double ellapsedMillis) { if (bodyStatus.state == bodyStatus.Homing) { goHoming((float) ellapsedMillis); } } } public void goHoming(float delta) { float distance = (float) delta * transleteSpeed; if (removeDirection.state == removeDirection.Left) { float currentX = itemView.getScrollX() + distance; if (currentX > screenWidth) { distance = distance - (currentX - screenWidth); } itemView.scrollBy((int) (distancE),itemView.getScrollY()); if (itemView.getScrollX() > screenWidth / 2 + 40 * screenWidth / 1080) { t2.setTranslationX(itemView.getScrollX() - screenWidth / 2 - 40 * 3f); } else { t2.setTranslationX(40 * 3f); } } else if (removeDirection.state == removeDirection.Right) { float currentX = itemView.getScrollX() - distance; if (currentX < -screenWidth) { distance = distance - (Math.abs(currentX) - screenWidth); } itemView.scrollBy((int) (-distancE),itemView.getScrollY()); if (itemView.getScrollX() < -(screenWidth / 2 + 40 * 3f * 2)) { t1.setTranslationX(-(Math.abs(itemView.getScrollX()) - screenWidth / 2 - 40 * 3f)); } else { t1.setTranslationX(-40 * 3f); } } else if (removeDirection.state == removeDirection.Homing_Left) { float currentX = itemView.getScrollX() - distance; if (currentX < 0) { distance = distance - (Math.abs(currentX)); } itemView.scrollBy((int) (-distancE),itemView.getScrollY()); } else if (removeDirection.state == removeDirection.Homing_Right) { float currentX = itemView.getScrollX() + distance; if (currentX > 0) { distance = distance - currentX; } itemView.scrollBy((int) (distancE),itemView.getScrollY()); } if (itemView.getScrollX() == 0 || itemView.getScrollX() >= screenWidth || itemView.getScrollX() <= -screenWidth) { openLooper.stop(); if (itemView.getScrollX() >= screenWidth) { mRemoveListener.removeItem(removeDirection,position); } else if (itemView.getScrollX() <= -screenWidth) { mRemoveListener.removeItem(removeDirection,position); } new Handler().postDelayed(new Runnable() { @Override public void run() { itemView.scrollTo(0,itemView.getScrollY()); bodyStatus.state = bodyStatus.None; } },300); } } public int touch_down_x; public int touch_down_y; public View itemView; public TextView t1; public TextView t2; public int SNAP_VELociTY = 800; public int position; @Override public Boolean dispatchTouchEvent(MotionEvent event) { int action = event.getAction(); if (action == MotionEvent.ACTION_DOWN) { // addVeLocityTracker(event); if (bodyStatus.state != bodyStatus.NonE) { return super.dispatchTouchEvent(event); } this.touch_down_x = (int) event.getX(); this.touch_down_y = (int) event.getY(); position = pointToPosition(touch_down_x,touch_down_y); if (position == AdapterView.INVALID_POSITION) { return super.dispatchTouchEvent(event); } itemView = getChildAt(position - getFirstVisiblePosition()); t2 = (TextView) itemView.findViewById(R.id.t2); t1 = (TextView) itemView.findViewById(R.id.t1); } else if (action == MotionEvent.ACTION_MOVE) { if (Math.abs(getScrollVeLocity()) > SNAP_VELociTY || (Math.abs(event.getX() - touch_down_X) > mTouchSlop && Math.abs(event.getY() - touch_down_y) < mTouchSlop)) { isSlide = true; } } else if (action == MotionEvent.ACTION_Up) { int veLocityX = getScrollVeLocity(); if (Math.abs(veLocityX) > SNAP_VELociTY) { if (veLocityX > SNAP_VELociTY) { bodyStatus.state = bodyStatus.Homing; removeDirection.state = removeDirection.Right; openLooper.start(); } else { bodyStatus.state = bodyStatus.Homing; removeDirection.state = removeDirection.Left; openLooper.start(); } } else { if (itemView.getScrollX() >= screenWidth / 2) { bodyStatus.state = bodyStatus.Homing; removeDirection.state = removeDirection.Left; openLooper.start(); } else if (itemView.getScrollX() <= -screenWidth / 2) { bodyStatus.state = bodyStatus.Homing; removeDirection.state = removeDirection.Right; openLooper.start(); } else { if (itemView.getScrollX() < 0) { removeDirection.state = removeDirection.Homing_Right; } else { removeDirection.state = removeDirection.Homing_Left; } bodyStatus.state = bodyStatus.Homing; openLooper.start(); } } recycleVeLocityTracker(); isSlide = false; } return super.dispatchTouchEvent(event); } public Boolean isSlide = false; @SuppressLint("Recycle") @Override public Boolean onTouchEvent(MotionEvent event) { if (isSlide && position != AdapterView.INVALID_POSITION) { requestDisallowInterceptTouchEvent(true); addVeLocityTracker(event); int x = (int) event.getX(); int action = event.getAction(); if (action == MotionEvent.ACTION_DOWN) { } else if (action == MotionEvent.ACTION_MOVE) { MotionEvent cancelEvent = MotionEvent.obtain(event); cancelEvent.setAction(MotionEvent.ACTION_CANCEL | (event.getActionIndex() << MotionEvent.ACTION_POINTER_INDEX_SHIFT)); onTouchEvent(cancelEvent); int deltaX = touch_down_x - x; touch_down_x = x; if (itemView.getScrollX() > screenWidth / 2 + 40 * 3f * 2) { t2.setTranslationX(itemView.getScrollX() - screenWidth / 2 - 40 * 3f); } else { t2.setTranslationX(40 * 3f); } if (itemView.getScrollX() < -(screenWidth / 2 + 40 * 3f * 2)) { t1.setTranslationX(-(Math.abs(itemView.getScrollX()) - screenWidth / 2 - 40 * 3f)); } else { t1.setTranslationX(-40 * 3f); } itemView.scrollBy(deltaX,0); return true; } } return super.onTouchEvent(event); } public RemoveListener mRemoveListener; public void setRemoveListener(RemoveListener removeListener) { this.mRemoveListener = removeListener; } public interface RemoveListener { public void removeItem(RemoveDirection direction,int position); } public VeLocityTracker veLocityTracker; public void addVeLocityTracker(MotionEvent event) { if (veLocityTracker == null) { veLocityTracker = VeLocityTracker.obtain(); } veLocityTracker.addMovement(event); } public int getScrollVeLocity() { if (veLocityTracker != null) { veLocityTracker.computeCurrentVeLocity(1000); int veLocity = (int) veLocityTracker.getXVeLocity(); return veLocity; } return 0; } public void recycleVeLocityTracker() { if (veLocityTracker != null) { veLocityTracker.recycle(); veLocityTracker = null; } } }
测试ListView的Activity代码:
package com.example.wz; import java.util.ArrayList; import android.app.Activity; import android.os.bundle; import android.util.Displaymetrics; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.baseAdapter; import android.widget.TextView; import com.example.wz.view.MyListView; import com.example.wz.view.MyListView.RemoveDirection; import com.example.wz.view.MyListView.RemoveListener; public class TestListActivity extends Activity { LayoutInflater mInflater; @Override protected void onCreate(Bundle savedInstanceStatE) { displaymetrics = new Displaymetrics(); this.getWindowManager().getDefaultDisplay().getMetrics(displaymetrics); super.onCreate(savedInstanceStatE); setContentView(R.layout.activity_testlist); mInflater = getLayoutInflater(); listView = (MyListView) findViewById(R.id.slideCutListView); showAddressDialog(); } public Displaymetrics displaymetrics; MyListView listView; public ArrayList<String> items; public void showAddressDialog() { items = new ArrayList<String>() { { add("item...1"); add("item...2"); add("item...3"); add("item...4"); add("item...5"); add("item...6"); add("item...7"); add("item...8"); add("item...9"); add("item...10"); add("item...11"); add("item...12"); add("item...13"); add("item...14"); add("item...15"); add("item...16"); add("item...17"); add("item...18"); add("item...19"); add("item...20"); } }; NearbyRelationAdapter nearbyRelationAdapter = new NearbyRelationAdapter(); listView.setAdapter(nearbyRelationAdapter); listView.setRemoveListener(new RemoveListener() { @Override public void removeItem(RemoveDirection direction,int position) { if (direction.state == direction.Left) { Log.e("A","left" + "-" + position); } else if (direction.state == direction.Right) { Log.e("A","right" + "-" + position); } } }); } public class NearbyRelationAdapter extends BaseAdapter { @Override public int getCount() { return items.size(); } @Override public Object getItem(int posotion) { return items.get(posotion); } @Override public long getItemId(int posotion) { return posotion; } @Override public View getView(int position,View convertView,ViewGroup parent) { Holder holder = null; if (convertView == null) { holder = new Holder(); convertView = mInflater.inflate(R.layout.view_menu_item1,null); holder.@R_607_10283@e = (TextView) convertView.findViewById(R.id.@R_607_10283@E); holder.o1 = convertView.findViewById(R.id.o1); holder.o1.setTranslationX(-displaymetrics.widthPixels); holder.o2 = convertView.findViewById(R.id.o2); holder.o2.setTranslationX(displaymetrics.widthPixels); convertView.setTag(holder); } else { holder = (Holder) convertView.getTag(); } holder.@R_607_10283@e.setText(items.get(position)); convertView.scrollTo(0,convertView.getScrollY()); return convertView; } class Holder { TextView @R_607_10283@e; View o1,o2; } } }
ListView布局文件:
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://scheR_838_11845@as.android.com/apk/res/android" xmlns:tools="http://scheR_838_11845@as.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:BACkground="@android:color/darker_gray" > <com.example.wz.view.MyListView android:id="@+id/slideCutListView" android:layout_width="match_parent" android:layout_height="match_parent" android:cachecolorHint="@android:color/transparent" android:listSELEctor="@android:color/transparent" > </com.example.wz.view.MyListView> <TextView android:layout_width="1dp" android:layout_height="match_parent" android:layout_centerHorizontal="true" android:BACkground="#0099cd" /> </RelativeLayout>
ListView 的Item布局:
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://scheR_838_11845@as.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:BACkground="#fff" > <RelativeLayout android:id="@+id/o1" android:layout_width="match_parent" android:layout_height="60dp" android:BACkground="#ff0000" > <TextView android:id="@+id/t1" android:layout_width="80dp" android:layout_height="wrap_content" android:layout_alignParentright="true" android:layout_centerVertical="true" android:gravity="center" android:padding="10dp" android:text="删除" android:textColor="#99000000" android:textSize="18sp" /> </RelativeLayout> <RelativeLayout android:id="@+id/o2" android:layout_width="match_parent" android:layout_height="60dp" android:BACkground="#660099cd" > <TextView android:id="@+id/t2" android:layout_width="80dp" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_centerVertical="true" android:gravity="center" android:padding="10dp" android:text="编辑" android:textColor="#99000000" android:textSize="18sp" /> </RelativeLayout> <RelativeLayout android:id="@+id/r1" android:layout_width="match_parent" android:layout_height="60dp" android:BACkground="#fff" > <TextView android:id="@+id/@R_607_10283@e" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_centerVertical="true" android:gravity="center_vertical" android:textColor="#99000000" android:textSize="18sp" /> </RelativeLayout> </RelativeLayout>
代码中用到的其他的类,在上一篇文章中有: @L_@R_@R_696_11287@_11280@_50@
转载来自:http://blog.csdn.net/qxs965266509
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