Spinner使用

     1.布局文件： <Spinner android:id="@+id/mySpinner" android:layout_width="match_parent" android:layout_height="wrap_content" />

     2.java后台：

 

           private Spinner statuSpinner;
           private ArrayAdapter<String> adapter;
           private static final String[] m_arr = {"全部","应用","指标"};
           private static final int [] m_value = {0,1,2};

 

 

         statuSpinner = (Spinner) findViewById(R.id.mySpinner);//初始化
  
          statuSpinner.setPrompt("请选择状态");
          adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,m_arr);//初始化下拉框的适配器
          adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
          statuSpinner.setAdapter(adapter);
          statuSpinner.setSelection(0);//初始：全部

          /**
           * 用户选择下拉框事件
           * @author Administrator
           *
           */
          class myOnItemSelectListen implements OnItemSelectedListener{
                   private ArrayAdapter<String> myArrayAdapter;
                   private Activity mcontext;
                   public myOnItemSelectListen(Activity c,ArrayAdapter<String> ad){
                            this.myArrayAdapter = ad;
                            this.mcontext = c;
                   }
                   public void onItemSelected(AdapterView<?> parent, View v, int pos,long row) {
                            Toast.makeText(mcontext, m_arr[pos]+"对应的ID为："+m_value[pos], Toast.LENGTH_LONG).show();
                            parent.setVisibility(View.VISIBLE);
                   }
                   public void onNothingSelected(AdapterView<?> parent){}
          }