将 gridView 项目的高度设置为宽度的两倍

Question

网格项的宽度会随着屏幕尺寸的变化而变化。 我需要将网格项的高度设置为网格项宽度的两倍。 即如果网格的宽度item=25dp高度必须为50dp。

这是我的适配器的 getView 功能

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    TextView no=new TextView(context);
    no.setText(position+"");
    // I need to set double of width instead of 150
    no.setLayoutParams(new FrameLayout.LayoutParams(android.widget.FrameLayout.LayoutParams.FILL_PARENT,150));
}

更新中...... 我的完整 getView

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    final int pos=position;
    View layout=null;
    itemWidth=gridView.getColumnWidth();
    layout=layout.inflate(context, R.layout.exam_grid_item, null);
    TextView examName=(TextView) layout.findViewById(R.id.examNameTextView);
    TextView examStatus=(TextView) layout.findViewById(R.id.textViewExamStatus);
    LinearLayout itemContainer = (LinearLayout)layout.findViewById(R.id.itemContainar);

    itemContainer.setLayoutParams(new FrameLayout.LayoutParams(android.widget.FrameLayout.LayoutParams.WRAP_CONTENT,itemWidth*2));

    ImageView statusImage=(ImageView)layout.findViewById(R.id.examStatusImageView);
    examName.setText("exam name"+itemHeight+"\n"+itemWidth);

    statusImage.setImageResource(R.drawable.tic);
    examStatus.setText("Attended");

    return layout;
}

Answer 1

这可以通过在适配器的 getView() 中以编程方式更改视图项大小来实现。我自己做了。

这样的事情应该可以工作：

@Override
    public View getView(int position, View convertView, ViewGroup viewGroup) {

        ....

        // Get item width by using getColumnWidth.
        // By doing this you support dynamic column width in grid.    
        final int columnWidth = gridView.getColumnWidth();

        // Set your views height here 
        final int columnHeight = 50; // This is in px

        AbsListView.LayoutParams lp = (AbsListView.LayoutParams)view.getLayoutParams();
        lp.width = columnWidth;
        lp.height = columnHeight;

        view.setLayoutParams(lp);

        return view;
    }

祝你好运！

Answer 2

创建一个继承 TextView 的子类（例如 DoubleWidthTextView）：

public class DoubleWidthTextView  extends TextView {

  ...

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);

    int width = getMeasuredWidth();
    int height = 2 * width;
    setMeasuredDimension(width, height);
  }

  ...

}

并使用它来代替 TextView。