为 GridView 编译 android 示例时出错

Question

我正在尝试根据 google GridView 示例为 GridView 编写一个简单的适配器；这是我的 getView 函数。

public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;

        if (convertView == null) {
            imageView = new ImageView(mContext);
            imageView.setLayoutParams(new GridLayout.LayoutParams(120,120));
            imageView.setScaleType(ImageView.ScaleType.CENTER);
            imageView.setPadding(2, 2, 2, 2);
        }
        else
        {
            imageView = (ImageView) convertView;
        }
        imageView.setImageResource(mThumbIds[position]);
        return imageView;
    }

但是我在这行 imageView.setLayoutParams(new GridLayout.LayoutParams(120,120));

遇到了这样的错误

Error:(39, 39) error: no suitable constructor found for LayoutParams(int,int)
constructor android.widget.GridLayout.LayoutParams.android.widget.GridLayout.LayoutParam (Context,AttributeSet) is not applicable
(actual argument int cannot be converted to Context by method invocation conversion)
constructor android.widget.GridLayout.LayoutParams.android.widget.GridLayout.LayoutParams(android.widget.GridLayout.LayoutParams) is not applicable
(actual and formal argument lists differ in length)
constructor android.widget.GridLayout.LayoutParams.android.widget.GridLayout.LayoutParams(MarginLayoutParams) is not applicable
(actual and formal argument lists differ in length)
constructor android.widget.GridLayout.LayoutParams.android.widget.GridLayout.LayoutParams(android.view.ViewGroup.LayoutParams) is not applicable
(actual and formal argument lists differ in length)
constructor android.widget.GridLayout.LayoutParams.android.widget.GridLayout.LayoutParams() is not applicable
(actual and formal argument lists differ in length)
constructor android.widget.GridLayout.LayoutParams.android.widget.GridLayout.LayoutParams(Spec,Spec) is not applicable
(actual argument int cannot be converted to Spec by method invocation conversion)

有什么解决办法吗？

Answer 1

尝试删除 imageView.setLayoutParams(新 GridLayout.LayoutParams(120,120));

Answer 2

检查以下代码：

import android.widget.GridLayout.LayoutParams;//import this statement

int dp = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 120, getResources().getDisplayMetrics()); 
imageView.setLayoutParams(new LayoutParams(dp, dp));//120dp

为 GridView 编译 android 示例时出错

Error while compiling android example for GridView

android

gridview

layout

layoutparams

getview