ListView 的简单应用包括点击事件

项目当中用到了ListView ，今天抽出时间整理了一下ListView的简单用法。

public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener ,AdapterView.OnItemClickListener,AbsListView.OnScrollListener{

    private ListView listView;
    private ArrayAdapter<String>arr_adapter;
    private SimpleAdapter simp_adapter;
    private List<Map<String,Object>>dataList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        listView = (ListView) findViewById(R.id.listView);
  //这个是数组适配器的数据源 ArrayAdapter      

String []arr_data={"逗你玩1","逗你玩2","逗你玩3","逗你玩4","逗你玩5","逗你玩6",};
//简单适配器SimpleAdapter 数据源    Map键值对形式   

 dataList = new ArrayList<Map<String,Object>>();
        arr_adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,arr_data);
        simp_adapter = new SimpleAdapter(this,getSimpDataList(),R.layout.simpitems,new String[]{"pic","text"},new int[]{R.id.simp_pic,R.id.simp_text});
//        listView.setAdapter(arr_adapter );
        listView.setAdapter(simp_adapter);
        listView.setOnItemClickListener(this);
        listView.setOnScrollListener(this);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.setDrawerListener(toggle) ;
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
    }

    private List<Map<String,Object>> getSimpDataList(){

        for(int i=0;i<30;i++){
            Map<String ,Object>map = new HashMap<String ,Object>();
            map.put("pic",R.mipmap.ic_launcher);
            map.put("text","DEMO逗你玩"+i);
            dataList.add(map);

        }
        return dataList;
    }

    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.nav_camera) {
            // Handle the camera action
        } else if (id == R.id.nav_gallery) {

        } else if (id == R.id.nav_slideshow) {

        } else if (id == R.id.nav_manage) {

        } else if (id == R.id.nav_share) {

        } else if (id == R.id.nav_send) {

        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
//监听点击事件

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        Toast.makeText(getApplicationContext(),"点击了"+position,Toast.LENGTH_LONG).show();
    }

//手势的监听
    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {

        switch (scrollState){
            case SCROLL_STATE_FLING:
                int i = 0;
                Log.i("Main","用户手指在离开屏幕之前，由于用力滑了一下，试图在惯性的情况下接着滑动");
                Map<String,Object>map = new HashMap<String,Object>();
                map.put("pic",R.mipmap.ic_launcher);
                map.put("text","我是增加项"+ ++i);
                dataList.add(map);
                simp_adapter.notifyDataSetChanged();
                break;
            case SCROLL_STATE_IDLE:
                Log.i("Main","视图已经停止滑动");
                break;
            case SCROLL_STATE_TOUCH_SCROLL:
                Log.i("Main","手指没有离开屏幕，试图正在滑动");
                break;
        }
    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {

    }
}

SimpAdapterXML布局 很简单

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:orientation="horizontal"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/simp_pic"
        android:layout_marginLeft="15dp"
        android:src="@mipmap/ic_launcher"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <TextView
        android:id="@+id/simp_text"
        android:textSize="20dip"
        android:textColor="#000"
        android:gravity="center"
        android:text="demo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>