小伙伴们在逛淘宝或者是各种app上,都可以看到这样的功能,下拉刷新和加载更多以及滑动删除,刷新,指刷洗之后使之变新,比喻突破旧的而创造出新的,比如在手机上浏览新闻的时候,使用下拉刷新的功能,我们可以第一时间掌握最新消息,加载更多是什么nie,简单来说就是在网页上逛淘宝的时候,我们可以点击下一页来满足我们更多的需求,但是在手机端就不一样了,没有上下页,怎么办nie,方法总比困难多,细心的小伙伴可能会发现,在手机端中,有加载更多来满足我们的要求,其实加载更多也是分页的一种体现。小伙伴在使用手机版QQ的时候,消息界面会有很多的信息,如果你也像小编一样有强迫症,想把看完的消息进行删除,怎么办nie,QQ实现了向右滑动删除的功能,最近在小编的项目中,就遇到这样的功能下拉刷新和加载更多以及滑动删除,经过几天的捣鼓,当冬日的第二缕阳光照到小编身上的时候,小编终于把她捣鼓出来了,今天这篇博客,小编主要和小伙伴们分享下拉刷新和加载更多一级滑动删除,希望可以帮助到有需要的小伙伴,还请小伙伴们多多指教。
首先我们需要来编写xml里面的内容,我们命名为activity_item,具体代码如下所示:
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:id="@+id/ll_parent"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:background="@android:color/darker_gray"
- android:orientation="vertical" >
- <TextView
- android:id="@+id/tv_text"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:gravity="center"
- android:textSize="25sp" />
- </LinearLayout>
接着,我们来编写list_item里面有关xml的代码,具体代码如下所示:
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- xmlns:tools="http://schemas.android.com/tools"
- android:id="@+id/ll_parent"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:gravity="center"
- android:background="@android:color/darker_gray"
- tools:context=".MainActivity" >
- <TextView
- android:id="@+id/list_item_textview"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerVertical="true"
- android:textColor="#000"
- android:textSize="16sp" />
- <FrameLayout
- android:layout_width="wrap_content"
- android:layout_height="match_parent"
- android:layout_centerVertical="true"
- android:layout_alignParentRight="true"
- android:padding="15dp" >
- <TextView
- android:id="@+id/tv_functions"
- android:layout_width="90dp"
- android:layout_height="50dp"
- android:layout_gravity="center"
- android:background="@drawable/btn_del_bg"
- android:gravity="center"
- android:textColor="@android:color/white"
- android:text="删除" />
- <TextView
- android:id="@+id/tv_coating"
- android:layout_width="90dp"
- android:layout_height="50dp"
- android:background="@android:color/darker_gray"
- android:layout_gravity="center"
- android:visibility="gone" />
- </FrameLayout>
- </RelativeLayout>
第三步,我们来编写main里面的xml文件,具体代码如下所示:
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:background="#f0f0f0"
- android:orientation="vertical" >
- <TextView
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="@string/hello" />
- <me.maxwin.view.XListView
- android:id="@+id/xListView"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:cacheColorHint="#00000000" >
- </me.maxwin.view.XListView>
- </LinearLayout>
第四步,我们来编写xlistview_footer里面的xml文件,具体代码如下所示:
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content" >
- <RelativeLayout
- android:id="@+id/xlistview_footer_content"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:padding="10dp" >
- <ProgressBar
- android:id="@+id/xlistview_footer_progressbar"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerInParent="true"
- android:visibility="invisible" />
- <TextView
- android:id="@+id/xlistview_footer_hint_textview"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerInParent="true"
- android:text="@string/xlistview_footer_hint_normal" />
- </RelativeLayout>
- </LinearLayout>
第五步,我们来编写xlistview_header里面的xml文件,具体代码如下所示:
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:gravity="bottom" >
- <RelativeLayout
- android:id="@+id/xlistview_header_content"
- android:layout_width="fill_parent"
- android:layout_height="60dp" >
- <LinearLayout
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerInParent="true"
- android:gravity="center"
- android:orientation="vertical" android:id="@+id/xlistview_header_text">
- <TextView
- android:id="@+id/xlistview_header_hint_textview"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="@string/xlistview_header_hint_normal" />
- <LinearLayout
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_marginTop="3dp" >
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="@string/xlistview_header_last_time"
- android:textSize="12sp" />
- <TextView
- android:id="@+id/xlistview_header_time"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:textSize="12sp" />
- </LinearLayout>
- </LinearLayout>
- <ImageView
- android:id="@+id/xlistview_header_arrow"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignLeft="@id/xlistview_header_text"
- android:layout_centerVertical="true"
- android:layout_marginLeft="-35dp"
- android:src="@drawable/xlistview_arrow" />
- <ProgressBar
- android:id="@+id/xlistview_header_progressbar"
- android:layout_width="30dp"
- android:layout_height="30dp"
- android:layout_alignLeft="@id/xlistview_header_text"
- android:layout_centerVertical="true"
- android:layout_marginLeft="-40dp"
- android:visibility="invisible" />
- </RelativeLayout>
- </LinearLayout>
至此,关于我们的布局xml文件的代码都已经写完了,接着,我们开始编写java类里面的代码,首先,我们来编写ItemActivity里面的代码,具体代码如下所示:
- import android.app.Activity;
- import android.os.Bundle;
- import android.view.MotionEvent;
- import android.view.View;
- import android.view.View.OnTouchListener;
- import android.widget.TextView;
- public class ItemActivity extends Activity implements OnTouchListener {
- private float x, upx;
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_item);
- init();
- }
- private void init() {
- findViewById(R.id.ll_parent).setOnTouchListener(this);
- ((TextView) findViewById(R.id.tv_text)).setText(getIntent().getStringExtra("item"));
- }
- public boolean onTouch(View v, MotionEvent event) {
- if (event.getAction() == MotionEvent.ACTION_DOWN) {
- x = event.getX();
- }
- if (event.getAction() == MotionEvent.ACTION_UP) {
- upx = event.getX();
- if (Math.abs(x - upx) > 20) {
- this.finish();
- overridePendingTransition(0, R.anim.slide_out_to_right);
- }
- }
- return true;
- }
- }
接着,我们来编写适配器adapter里面的代码,具体代码如下所示:
- import java.util.ArrayList;
- import android.content.Context;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.ViewGroup;
- import android.widget.BaseAdapter;
- import android.widget.TextView;
- public class ItemAdapter extends BaseAdapter {
- private LayoutInflater inflater;
- private ArrayList<String> datas;
- public ItemAdapter(Context context) {
- inflater = LayoutInflater.from(context);
- }
- public void setData(ArrayList<String> datas) {
- this.datas = datas;
- }
- public int getCount() {
- return datas.size();
- }
- public Object getItem(int position) {
- return datas.get(position);
- }
- public long getItemId(int position) {
- return position;
- }
- public View getView(final int position, View convertView, ViewGroup parent) {
- ViewHolder holder = null;
- if (convertView == null) {
- holder = new ViewHolder();
- convertView = inflater.inflate(R.layout.list_item, null);
- holder.coating = (TextView) convertView.findViewById(R.id.tv_coating);
- holder.functions = (TextView) convertView.findViewById(R.id.tv_functions);
- holder.list_item_textview=(TextView) convertView.findViewById(R.id.list_item_textview);
- convertView.setTag(holder);
- } else {
- holder = (ViewHolder) convertView.getTag();
- }
- holder.list_item_textview.setText(datas.get(position));
- holder.coating.setVisibility(View.VISIBLE);
- holder.functions.setClickable(false);
- return convertView;
- }
- public final class ViewHolder {
- public TextView coating;
- public TextView functions;
- public TextView list_item_textview;
- }
- }
最后我们来编写XListViewActivity里面的代码,具体代码如下所示:
- import java.util.ArrayList;
- import me.maxwin.view.XListView;
- import me.maxwin.view.XListView.IXListViewListener;
- import me.maxwin.view.XListView.RemoveListener;
- import android.app.Activity;
- import android.content.Context;
- import android.content.Intent;
- import android.os.Bundle;
- import android.os.Handler;
- import android.view.View;
- import android.widget.AdapterView;
- import android.widget.AdapterView.OnItemClickListener;
- public class XListViewActivity extends Activity implements IXListViewListener ,RemoveListener,OnItemClickListener{
- private XListView mListView;
- // private ArrayAdapter<String> mAdapter;
- private ItemAdapter adapter;
- // private Context context;
- private ArrayList<String> items = new ArrayList<String>();
- private Handler mHandler;
- private int start = 0;
- private static int refreshCnt = 0;
- /** Called when the activity is first created. */
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- geneItems();
- init();
- mHandler = new Handler();
- }
- private void init() {
- // TODO Auto-generated method stub
- mListView = (XListView) findViewById(R.id.xListView);
- mListView.setPullLoadEnable(true);
- mListView.setRemoveListener(this);
- mListView.setOnItemClickListener(this);
- // mListView.setPullLoadEnable(false);
- // mListView.setPullRefreshEnable(false);
- mListView.setXListViewListener(this);
- adapter=new ItemAdapter(this);
- adapter.setData(items);
- mListView.setAdapter(adapter);
- }
- private void geneItems() {
- for (int i = 0; i != 20; ++i) {
- items.add("refresh cnt " + (++start));
- }
- }
- private void onLoad() {
- mListView.stopRefresh();
- mListView.stopLoadMore();
- mListView.setRefreshTime("刚刚");
- }
- @Override
- public void onRefresh() {
- mHandler.postDelayed(new Runnable() {
- @Override
- public void run() {
- start = ++refreshCnt;
- items.clear();
- geneItems();
- // mAdapter.notifyDataSetChanged();
- adapter=new ItemAdapter(XListViewActivity.this);
- adapter.setData(items);
- mListView.setAdapter(adapter);
- onLoad();
- }
- }, 2000);
- }
- @Override
- public void onLoadMore() {
- mHandler.postDelayed(new Runnable() {
- @Override
- public void run() {
- geneItems();
- adapter.notifyDataSetChanged();
- onLoad();
- }
- }, 2000);
- }
- @Override
- public void removeItem(int position) {
- // TODO Auto-generated method stub
- mListView.isSlide = false;
- mListView.itemView.findViewById(R.id.tv_coating).setVisibility(View.VISIBLE);
- items.remove(position);
- adapter.notifyDataSetChanged();
- }
- @Override
- public void onItemClick(AdapterView<?> parent, View view, int position,
- long id) {
- // TODO Auto-generated method stub
- Intent intent = new Intent(getApplicationContext(), ItemActivity.class);
- intent.putExtra("item", items.get(position));
- startActivity(intent);
- overridePendingTransition(R.anim.slide_in_from_right, R.anim.remain_original_location);
- }
- }
至此,我们代码部分都已经编写完毕,由于小编的genymotion暂时不能运行,所以截图暂时看不了了,还请小伙伴们多多见谅哦`(*∩_∩*)′!
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