Android之PullToRefresh的使用方法

android studio 导入 PullToRefresh

// 下载
https://github.com/chrisbanes/Android-PullToRefresh
// 解压，得到 extras，sample，library(主要)
Android-PullToRefresh-master -> library
// 在你项目的根目录创建一个lib目录
[PATH]
[app]
    [src]
    [res]
    [build]
    build.gradle
    ...
[build]
[gradle]
[lib]
    // 将 library 重名名为 pull
    [pull]
        [src]
        [res]
        [build]
        ... 
build.gradle
settings.gradle
...
// 修改 settings.gradle 
include ':app', ':lib:pull'
// 修改 [app]/build.gradle
dependencies {
    // Library
    compile project(':lib:pull')
}
// 创建 [lib]/[pull]/build.gradle
apply plugin: 'android-library'
android {
    compileSdkVersion 17
    buildToolsVersion "21.1.2"
    sourceSets {
    main {
        manifest.srcFile 'AndroidManifest.xml'
        java.srcDirs = ['src']
        resources.srcDirs = ['src']
        aidl.srcDirs = ['aidl']
        renderscript.srcDirs = ['src']
        res.srcDirs = ['res']
        assets.srcDirs = ['assets']
    }
    }
}
// 完成 

使用 PullToRefresh 刷新 ListView

//  在 activity_main.xml 增加一个 PullToRefreshListView
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
    <com.handmark.pulltorefresh.library.PullToRefreshListView
    android:id="@+id/left_drawer"
    android:layout_width="240dp"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:choiceMode="singleChoice"
    android:dividerHeight="1px"
    android:divider="#ff000000"
    android:background="#ffffffff"
    android:layout_alignParentTop="true"
    android:layout_alignParentEnd="true"
    android:layout_alignParentStart="true" />
</RelativeLayout>
// 在 MainActivity
public class MainActivity extends Activity {
    PullToRefreshListView lv;
    private String[] mListTitle = {"姓名", "性别", "年龄", "居住地", "邮箱"};
    private String[] mListStr = {"雨松MOMO", "男", "25", "北京",
        "xuanyusong@gmail.com"};
    ListView mListView = null;
    ArrayList<Map<String, Object>> mData = new ArrayList<Map<String, Object>>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    // 获取 PullToRefreshListView View
    lv = (PullToRefreshListView) findViewById(R.id.left_drawer);
    // ....
    int lengh = mListTitle.length;
    for (int i = 0; i < lengh; i++) {
        Map<String, Object> item = new HashMap<String, Object>();
        item.put("title", mListTitle[i]);
        item.put("text", mListStr[i]);
        mData.add(item);
    }
    // ...
    SimpleAdapter adapter = new SimpleAdapter(this, mData, android.R.layout.simple_list_item_2,
         new String[]{"title", "text"}, new int[]{android.R.id.text1, android.R.id.text2});
    // 将 SimpleAdapter 设置到 PullToRefreshListView
    lv.setAdapter(adapter);
    // 刷新事件监听
    lv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener<ListView>() {
        @Override
        public void onRefresh(PullToRefreshBase<ListView> refreshView) {
        // ...
        new AsyncTask<Void, Void, Void>() {
            @Override
            protected Void doInBackground(Void... params) {
            // 处理刷新任务
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            return null;
            }
            @Override
            protected void onPostExecute(Void reslst)
            {
            // 更行内容，通知 PullToRefresh 刷新结束
            lv.onRefreshComplete();
            }
        }.execute();
        }
    });
    }
} 

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