Android 如何将cardview动态添加到网格布局

我正在尝试将cardview动态添加到GridLayout。但它并没有添加cardview

层次结构是ScrollView-->水平ScrollView-->线性布局-->GridLayout，我想添加到此网格布局。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);

}
}

因此，如何将视图动态添加到GridLayout

---

谢谢。

您的代码中有一些错误。。。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);

 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);

如果要将视图添加到特定行和特定列，请使用此

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);

 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，行和列总是使用0,0，所以基本上发生的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视图。代码中有一些错误。。。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);

 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);

如果要将视图添加到特定行和特定列，请使用此

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);

 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);

在您的例子中，行和列总是使用0,0，所以基本上发生的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视图