侧滑删除进阶（三）

本文主要是介绍侧滑删除进阶（三），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

附上一张不是效果的效果图，之前图丢了，从新弄下，大概意思就是这个

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent" ><com.example.listviewitemslidedeletebtnshow.QQListViewandroid:id="@+id/id_listview"android:layout_width="fill_parent"android:layout_height="wrap_content" ></com.example.listviewitemslidedeletebtnshow.QQListView></RelativeLayout>

listview_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="wrap_content" ><TextViewandroid:id="@+id/id_item_tv"android:layout_width="fill_parent"android:layout_height="wrap_content"android:background="@drawable/listbg_normal"android:gravity="center_vertical"android:text="helloworld" /></RelativeLayout>

delete_btn.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="wrap_content"android:layout_height="wrap_content"android:orientation="vertical" ><Buttonandroid:id="@+id/id_item_btn"android:layout_width="60dp"android:layout_height="wrap_content"android:layout_marginRight="15dp"android:background="@drawable/d_delete_btn"android:paddingLeft="15dp"android:paddingRight="15dp"android:singleLine="true"android:text="删除"android:textColor="#ffffff" /></LinearLayout>

delete_btn_hide.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"><scale  android:interpolator="@android:anim/accelerate_decelerate_interpolator"android:fromXScale="1.0"android:toXScale="0.0"android:fromYScale="1.0"android:toYScale="1.0"android:pivotX="100%"android:pivotY="50%"android:fillAfter="false"android:duration="200" ></scale></set>

delete_btn_show.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" ><scaleandroid:duration="200"android:fillAfter="false"android:fromXScale="0.0"android:fromYScale="1.0"android:interpolator="@android:anim/accelerate_decelerate_interpolator"android:pivotX="100%"android:pivotY="50%"android:toXScale="1.0"android:toYScale="1.0" ></scale></set>

MainActivity

package com.example.listviewitemslidedeletebtnshow;import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Toast;import com.example.listviewitemslidedeletebtnshow.QQListView.DelButtonClickListener;public class MainActivity extends Activity {private QQListView mListView;private ArrayAdapter<String> mAdapter;private List<String> mDatas;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mListView = (QQListView) findViewById(R.id.id_listview);// 不要直接Arrays.asListmDatas = new ArrayList<String>(Arrays.asList("HelloWorld", "Welcome","Java", "Android", "Servlet", "Struts", "Hibernate", "Spring","HTML5", "Javascript", "Lucene"));mAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, mDatas);mListView.setAdapter(mAdapter);mListView.setDelButtonClickListener(new DelButtonClickListener() {@Overridepublic void clickHappend(final int position) {Toast.makeText(MainActivity.this,position + " : " + mAdapter.getItem(position), 1).show();mAdapter.remove(mAdapter.getItem(position));}});mListView.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view,int position, long id) {Toast.makeText(MainActivity.this,position + " : " + mAdapter.getItem(position), 1).show();}});}
}

QQListView

package com.example.listviewitemslidedeletebtnshow;import android.content.Context;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.PopupWindow;public class QQListView extends ListView {private static final String TAG = "QQlistView";// private static final int VELOCITY_SANP = 200;// private VelocityTracker mVelocityTracker;/*** 用户滑动的最小距离*/private int touchSlop;/*** 是否响应滑动*/private boolean isSliding;/*** 手指按下时的x坐标*/private int xDown;/*** 手指按下时的y坐标*/private int yDown;/*** 手指移动时的x坐标*/private int xMove;/*** 手指移动时的y坐标*/private int yMove;private LayoutInflater mInflater;private PopupWindow mPopupWindow;private int mPopupWindowHeight;private int mPopupWindowWidth;private Button mDelBtn;/*** 为删除按钮提供一个回调接口*/private DelButtonClickListener mListener;/*** 当前手指触摸的View*/private View mCurrentView;/*** 当前手指触摸的位置*/private int mCurrentViewPos;/*** 必要的一些初始化* * @param context* @param attrs*/public QQListView(Context context, AttributeSet attrs) {super(context, attrs);mInflater = LayoutInflater.from(context);touchSlop = ViewConfiguration.get(context).getScaledTouchSlop();View view = mInflater.inflate(R.layout.delete_btn, null);mDelBtn = (Button) view.findViewById(R.id.id_item_btn);mPopupWindow = new PopupWindow(view,LinearLayout.LayoutParams.WRAP_CONTENT,LinearLayout.LayoutParams.WRAP_CONTENT);/*** 先调用下measure,否则拿不到宽和高*/mPopupWindow.getContentView().measure(0, 0);mPopupWindowHeight = mPopupWindow.getContentView().getMeasuredHeight();mPopupWindowWidth = mPopupWindow.getContentView().getMeasuredWidth();}@Overridepublic boolean dispatchTouchEvent(MotionEvent ev) {int action = ev.getAction();int x = (int) ev.getX();int y = (int) ev.getY();switch (action) {case MotionEvent.ACTION_DOWN:xDown = x;yDown = y;/*** 如果当前popupWindow显示，则直接隐藏，然后屏蔽ListView的touch事件的下传*/if (mPopupWindow.isShowing()) {dismissPopWindow();return false;}// 获得当前手指按下时的item的位置mCurrentViewPos = pointToPosition(xDown, yDown);// 获得当前手指按下时的itemView view = getChildAt(mCurrentViewPos - getFirstVisiblePosition());mCurrentView = view;break;case MotionEvent.ACTION_MOVE:xMove = x;yMove = y;int dx = xMove - xDown;int dy = yMove - yDown;/*** 判断是否是从右到左的滑动*/if (xMove < xDown && Math.abs(dx) > touchSlop&& Math.abs(dy) < touchSlop) {isSliding = true;}break;}return super.dispatchTouchEvent(ev);}@Overridepublic boolean onTouchEvent(MotionEvent ev) {int action = ev.getAction();/*** 如果是从右到左的滑动才相应*/if (isSliding) {switch (action) {case MotionEvent.ACTION_MOVE:int[] location = new int[2];// 获得当前item的位置x与ymCurrentView.getLocationOnScreen(location);// 设置popupWindow的动画mPopupWindow.setAnimationStyle(R.style.popwindow_delete_btn_anim_style);mPopupWindow.update();/*** location[0]为0* */mPopupWindow.showAtLocation(mCurrentView, Gravity.LEFT| Gravity.TOP, location[0] + mCurrentView.getWidth(),location[1] + mCurrentView.getHeight() / 2- mPopupWindowHeight / 2);// 设置删除按钮的回调mDelBtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {if (mListener != null) {mListener.clickHappend(mCurrentViewPos);mPopupWindow.dismiss();}}});// Log.e(TAG, "mPopupWindow.getHeight()=" + mPopupWindowHeight);break;case MotionEvent.ACTION_UP:isSliding = false;}// 相应滑动期间屏幕itemClick事件，避免发生冲突return true;}return super.onTouchEvent(ev);}/*** 隐藏popupWindow*/private void dismissPopWindow() {if (mPopupWindow != null && mPopupWindow.isShowing()) {mPopupWindow.dismiss();}}public void setDelButtonClickListener(DelButtonClickListener listener) {mListener = listener;}interface DelButtonClickListener {public void clickHappend(int position);}}

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