侧滑删除进阶（一）

package com.yangfuhai.animation1;

import java.util.ArrayList;

import android.app.ListActivity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends ListActivity {
private ArrayList<String> array;
private ArrayAdapter<String> adapter;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ListView listView = getListView();
array = new ArrayList<String>();
String aa[] = { "items1", "item2", "items3", "item4", "items5",
"item6", "items7", "item8", "items9", "item10", "items11",
"item12" };
for (int i = 0; i < aa.length; i++) {
array.add(aa[i]);
}
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, array);
listView.setAdapter(adapter);

listView.setOnTouchListener(new OnTouchListener() {
float x, y, upx, upy;

public boolean onTouch(View view, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
Toast.makeText(MainActivity.this, "down", 0).show();
x = event.getX();
y = event.getY();
}
if (event.getAction() == MotionEvent.ACTION_UP) {
Toast.makeText(MainActivity.this, "up", 0).show();
upx = event.getX();
upy = event.getY();
// 我把它理解为通过x和y的位置来确定这个listView里面这个item的位置
int position1 = ((ListView) view).pointToPosition((int) x,
(int) y);
int position2 = ((ListView) view).pointToPosition(
(int) upx, (int) upy);

if (position1 == position2 && upx > x
&& Math.abs(x - upx) > 50) {
View v = ((ListView) view).getChildAt(position1);
removeListItem(v, position1);
}
}
return false;
}

});

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> parent, View rowView,
int positon, long id) {
Toast.makeText(rowView.getContext(),
"你点击了第" + positon + "位置的item", Toast.LENGTH_SHORT)
.show();
}
});
}

protected void removeListItem(View rowView, final int positon) {

final Animation animation = (Animation) AnimationUtils.loadAnimation(
rowView.getContext(), R.anim.item_anim);
animation.setAnimationListener(new AnimationListener() {
public void onAnimationStart(Animation animation) {
}

public void onAnimationRepeat(Animation animation) {
}

public void onAnimationEnd(Animation animation) {
array.remove(positon);
adapter.notifyDataSetChanged();
animation.cancel();
}
});

rowView.startAnimation(animation);

}
}

<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="800"
android:fromXDelta="0"
android:fromYDelta="0"
android:toXDelta="800"
android:toYDelta="0" />