android - 如何识别布局中的 View ？

Question

我创建了一个 ImageView

ImageView _view;
ViewGroup _root;
public void CreateImageView() {
    _root = (ViewGroup) findViewById(R.id.root);
    for (int i = 0; i < 5; i++) {
        _view = new ImageView(this);
        RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(100, 100);
        layoutParams.leftMargin = 150;
        layoutParams.topMargin = 50;
        _view.setLayoutParams(layoutParams);
        _view.setId(i);
        _root.addView(_view);
    }
}

当我点击 id = 3 的 ImageView 时，应该调用 Toast。我怎样才能做到这一点？

Answer 1

取一个像 _view = new ImageView[size]; 这样的 imageview 整数数组，在 forloop 中初始化并将标签设置为 imageview，然后在处理点击事件时，获取tag likeint k = (Integer) v.getTag(); 这样你就可以准确点击 View 。

ImageView _view;
      ViewGroup _root;
      public void CreateImageView()
      {
          _root = (ViewGroup)findViewById(R.id.root);
_view = new ImageView[5];
            for ( int i = 0; i< 5;i++)
            {
                _view[i] = new RadioButton(this);
                _view[i].setTag(i);
                RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(100, 100);
                layoutParams.leftMargin = 150;
                layoutParams.topMargin = 50;
                _view.setLayoutParams(layoutParams);
                _root.addView(_view[i]);
            }
      }

点击事件#

 _view[j].setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View v) {
    // TODO Auto-generated method stub.
    int k = (Integer) v.getTag();

        if(k==3){
        Toast.makeText(this, "Your Message", Toast.LENGTH_LONG).show();
      }

    }
 }