Android学习笔记——Menu介绍(二)

private TextView textView;
  final int RED = 0x101;
  final int BLUE = 0x102;
  final int GREEN = 0x103;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    textView=(TextView)findViewById(R.id.textView);
    //给textView注册上下文菜单
    registerForContextMenu(textView);
  }
//创建上下文菜单
  @Override
  public void onCreateContextMenu(ContextMenu menu, View v,
      ContextMenuInfo menuInfo) {
    menu.add(0, RED, 0, "Red");
    menu.add(0, BLUE, 0, "Blue");
    menu.add(0,GREEN,0,"Green");
    menu.setHeaderTitle("Set the color of the textView");
    menu.setGroupCheckable(0, true, true);
  }
  //菜单项响应事件
  @Override
  public boolean onContextItemSelected(MenuItem item) {
     switch (item.getItemId()) {
    case GREEN:
      item.setChecked(true);
      textView.setBackgroundColor(Color.GREEN);
      break;
    case BLUE:
      item.setChecked(true);
      textView.setBackgroundColor(Color.BLUE);
      break;
    case RED:
      item.setChecked(true);
      textView.setBackgroundColor(Color.RED);
      break;
    }
     return true;
  }

private ListView listView;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    listView=(ListView)findViewById(R.id.listview1);
    String arr[]={"New York","Shanghai","Los Angle","BeiJing","Paris","Tykyo","Moscow","Berlin","HongKong"};
    //将数组包装成ArrayAdapter
    ArrayAdapter<String> adapter1= new ArrayAdapter<String>(this,R.layout.array_item ,arr);
    listView.setAdapter(adapter1);
    
    listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
    listView.setMultiChoiceModeListener(new MultiChoiceModeListener() {
      
      @Override
      public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
        // TODO Auto-generated method stub
        return false;
      }
      
      @Override
      public void onDestroyActionMode(ActionMode mode) {
        // TODO Auto-generated method stub
        
      }
      
      @Override
      public boolean onCreateActionMode(ActionMode mode, Menu menu) {
        // TODO Auto-generated method stub
          MenuInflater inflater = mode.getMenuInflater();
          inflater.inflate(R.menu.contextmenu, menu);
          return true;
      }
      
      @Override
      public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
        switch (item.getItemId()) {
      case R.id.done:
        Toast.makeText(MainActivity.this, "You have clicked the DONE", Toast.LENGTH_LONG).show();
        break;
      case R.id.cancel:
        Toast.makeText(MainActivity.this, "You have clicked the CANCEL", Toast.LENGTH_LONG).show();
      default:
        break;
      }  
        return true;
      }
      
      @Override
      public void onItemCheckedStateChanged(ActionMode mode, int position,
          long id, boolean checked) {
        // TODO Auto-generated method stub
        
      }
    });
  }