标签：popupwindow dispatchtouchevent getfirstvisibleposit setanimationstyle pointtoposition
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.QQListView
android:id="@+id/id_listview"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
</com.example.listviewitemslidedeletebtnshow.QQListView>
</RelativeLayout><?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" >
<TextView
android: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><?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" >
<Button
android: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><?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><?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<scale
android: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>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;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mListView = (QQListView) findViewById(R.id.id_listview);
// 不要直接Arrays.asList
mDatas = 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() {
@Override
public void clickHappend(final int position) {
Toast.makeText(MainActivity.this,
position + " : " + mAdapter.getItem(position), 1)
.show();
mAdapter.remove(mAdapter.getItem(position));
}
});
mListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(MainActivity.this,
position + " : " + mAdapter.getItem(position), 1)
.show();
}
});
}
}
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();
}
@Override
public 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item
View 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);
}
@Override
public 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y
mCurrentView.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() {
@Override
public 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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标签：popupwindow dispatchtouchevent getfirstvisibleposit setanimationstyle pointtoposition
原文地址：http://blog.csdn.net/u013210620/article/details/47447143
