@Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.simple_adapter_init);
      listView=(ListView)findViewById(R.id.lv);
      simpleAdapter=new SimpleAdapter(this,getData(),R.layout.simple_adapter_detail,new String[]{"pic","text"},new int[]{R.id.iv,R.id.tv});
      listView.setAdapter(simpleAdapter);
      listView.setOnItemClickListener(this);
  }

 @Override
  public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
      /*adapterView是指当前的listview；
       *view是当前listview中的item的view的布局,就是可用这个view获取里面控件id后操作控件
       * i是当前item在listview中适配器的位置
       * l是当前item在listview里第几行的位置
       */
      //获得选中项中的HashMap对象
      HashMap<String,String> map=(HashMap<String,String>)adapterView.getItemAtPosition(i);
      String Text=map.get("text");
      Toast.makeText(this,Text,Toast.LENGTH_SHORT).show();
  }

public void click(View view){
      AlertDialog alertDialog=new AlertDialog.Builder(this).setView(R.layout.loginview).
              setNegativeButton("Cancel", null).
              setPositiveButton("Sign in", null).create();
      alertDialog.show();
  }

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
  <item
      android:id="@+id/item1"
      android:title="字体大小" >
      <menu>
          <item
              android:id="@+id/inner1"
              android:title="小"/>
          <item
              android:id="@+id/inner2"
              android:title="中"/>
          <item
              android:id="@+id/inner3"
              android:title="大"/>
      </menu>
  </item>
  <item
      android:id="@+id/item2"
      android:title="普通菜单项" />
  <item
      android:id="@+id/item3"
      android:title="字体颜色" >
      <menu>
          <item
              android:id="@+id/inner4"
              android:title="红色"/>
          <item
              android:id="@+id/inner5"
              android:title="黑色"/>
      </menu>
  </item>
</menu>

@Override 
  public boolean onOptionsItemSelected(MenuItem item) {
      switch (item.getItemId()) {
          case R.id.inner1:
              textView.setTextSize(10);
              break;
          case R.id.inner2:
              textView.setTextSize(16);
              break;
          case R.id.inner3:
              textView.setTextSize(20);
              break;
          case R.id.item2:
              Toast.makeText(this, "这是普通菜单项", Toast.LENGTH_SHORT).show();
              break;
          case R.id.inner4:
              textView.setTextColor(Color.parseColor("#FF0000"));
              break;
          case R.id.inner5:
              textView.setTextColor(Color.parseColor("#000000"));
              break;
      }
      return true;
  }

listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
      listView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {

          @Override
          public void onItemCheckedStateChanged(ActionMode mode, int position,
                                                long id, boolean checked) {
              // Here you can do something when items are selected/de-selected,
              // such as update the title in the CAB
              mode.setTitle(listView.getCheckedItemCount()+" selected");

          }

          @Override
          public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
              // Respond to clicks on the actions in the CAB
              switch (item.getItemId()) {
                  case R.id.i1:
                      //deleteSelectedItems();
                      mode.finish(); // Action picked, so close the CAB
                      return true;
                  default:
                      return false;
              }
          }

          @Override
          public boolean onCreateActionMode(ActionMode mode, Menu menu) {
              // Inflate the menu for the CAB
              MenuInflater inflater = mode.getMenuInflater();
              inflater.inflate(R.menu.action_mode, menu);
              return true;
          }

          @Override
          public void onDestroyActionMode(ActionMode mode) {
              // Here you can make any necessary updates to the activity when
              // the CAB is removed. By default, selected items are deselected/unchecked.
          }

          @Override
          public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
              // Here you can perform updates to the CAB due to
              // an invalidate() request
              return false;
          }
      });

@Override
public void onItemCheckedStateChanged(ActionMode mode, int position,
                                      long id, boolean checked) {
    // Here you can do something when items are selected/de-selected,
    // such as update the title in the CAB
    mode.setTitle(listView.getCheckedItemCount()+" selected");
}

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item
      android:state_activated="true"
      android:drawable="@color/blue"/>
</selector>

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