如何将cardview动态添加到网格布局答案

【问题标题】：How to dynamically add cardview to grid layout如何将cardview动态添加到网格布局
【发布时间】：2023-03-14 19:58:02
【问题描述】：

我正在尝试将 cardview 动态添加到 GridLayout。但它没有添加卡片视图。

层次结构是 ScrollView --> HorizontalScrollView --> LinearLayout --> GridLayout，我想添加到这个网格布局中。我的代码是：

public class MainActivity extends AppCompatActivity {
GridLayout gridLayout;
TextView tc;
CardView newc;
@SuppressLint("SetTextI18n")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    gridLayout = findViewById(R.id.gridlayout);

   newc = new CardView(getApplicationContext());
   newc.setLayoutParams(new CardView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
   newc.setRadius(8);
   newc.setCardElevation(10);
   tc = new TextView(getApplicationContext());
   tc.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
   tc.setText("This is dynamic");
   newc.addView(tc);
   GridLayout.Spec row = GridLayout.spec(0);
   GridLayout.Spec col = GridLayout.spec(0);
   GridLayout.LayoutParams gridP = new GridLayout.LayoutParams(row, col);
   gridLayout.addView(newc, gridP);

}
}

那么如何将视图动态添加到 GridLayout。

谢谢。

【问题讨论】：

标签： android android-layout grid-layout

【解决方案1】：

你的代码中有一些错误......使用这个

newc = new CardView(getApplicationContext());
newc.setLayoutParams(new CardView.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
newc.setRadius(8);
 newc.setCardElevation(10);
tc = new TextView(getApplicationContext());
tc.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
tc.setText("This is dynamic");
newc.addView(tc);
gridLayout.setColumnCount(2);
gridLayout.setOrientation(GridLayout.HORIZONTAL);
gridLayout.addView(newc);

如果你想为特定的行和特定的列添加视图，请使用这个

 GridLayout.Spec row = GridLayout.spec(0); // Mention row index here
   GridLayout.Spec col = GridLayout.spec(0);// Mention column index here
   GridLayout.LayoutParams gridP = new GridLayout.LayoutParams(row, col);

在您的情况下，您始终使用 0,0 表示行和列，因此基本上发生的情况是视图被添加到网格布局中，但它们是重叠的，因此您无法看到这些

【讨论】：