下拉刷新SwipeRefreshLayout源码

API doc：http://developer.android.com/reference/android/support/v4/widget/SwipeRefreshLayout.html

Google在support v4 19.1版本推出了一个下拉刷新组件SwipeRefreshLayout,使用起来方便，效果优美，但要注意的是其布局中只能有一个直接子布局。使用步骤如下：

1.在xml中，加载android.support.v4.widget.SwipeRefreshLayout

<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/layout_containter"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >
    
    <ListView 
        android:id="@+id/list"
        android:layout_width="match_parent"
    	android:layout_height="match_parent"></ListView>

</android.support.v4.widget.SwipeRefreshLayout>

2.使用

package com.example.testswiperefreshlayout;

import android.os.Bundle;
import android.os.Handler;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v4.widget.SwipeRefreshLayout.OnRefreshListener;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity implements OnRefreshListener {

	private SwipeRefreshLayout mSwipeRefreshLayout;
	private ListView mList;

	@SuppressLint("InlinedApi")
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		mList = (ListView) findViewById(R.id.list);
		mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.layout_containter);
		mSwipeRefreshLayout.setColorSchemeResources(android.R.color.holo_blue_light,
				android.R.color.holo_green_light,
				android.R.color.holo_orange_light,
				android.R.color.holo_red_light);
		mSwipeRefreshLayout.setOnRefreshListener(this);
		
	}

	@Override
	public void onRefresh() {
		new Handler().postDelayed(new Runnable() {
			
			@Override
			public void run() {
				mSwipeRefreshLayout.setRefreshing(false);
				mList.setAdapter(new MyAdapter());
			}
		}, 5000);
	}
	
	class MyAdapter extends BaseAdapter {

		@Override
		public int getCount() {
			return 10;
		}

		@Override
		public Object getItem(int position) {
			// TODO Auto-generated method stub
			return null;
		}

		@Override
		public long getItemId(int position) {
			// TODO Auto-generated method stub
			return 0;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			View inflate = null;
			TextView tvItem = null;
			if (convertView == null) {
				inflate = getLayoutInflater().inflate(R.layout.listview_item, null);
				tvItem = (TextView) inflate.findViewById(R.id.tv_item);
				inflate.setTag(tvItem);
			} else {
				inflate = convertView;
				tvItem = (TextView) inflate.getTag();
			}
			tvItem.setText("下拉刷新item"+position);
			return inflate;
		}
		
	}


}

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