Question

我在网上搜索了近2个小时，但找不到任何适合我的东西。

简单，我有一个带有列表视图的Android应用程序，其中包含复选框。

现在，当我点击一个按钮时，我想要的就是检查一个复选框（并且这在屏幕上可见）无论我到目前为止尝试了什么，都不会检查复选框。

那是我的代码：

public class MainActivity extends Activity {
SparseArray<Group> groups = new SparseArray<Group>();
List<String> checkedMedia = new ArrayList<String>();
ExpandableListView listView;
MyExpandableListAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    createData();
    listView = (ExpandableListView) findViewById(R.id.listView);
    adapter = new MyExpandableListAdapter(this,
            groups);
    listView.setAdapter(adapter);
    listView.expandGroup(0);
}


public void onCheckboxClicked(View view) {
    CheckBox checkBox = (CheckBox) view;
    boolean checked = checkBox.isChecked();

    View chBoxParent = (View) checkBox.getParent();
    TextView textView = (TextView) chBoxParent.findViewById(R.id.textView1);
    String medium = textView.getText().toString();

    if (checked) {
        Toast.makeText(this, "checked: " + medium, Toast.LENGTH_SHORT).show();
    } else {
        Toast.makeText(this, "unchecked: " + medium, Toast.LENGTH_SHORT).show();
    }
}

public void onButtonClicked(View view) {
    View view0 = adapter.getChildView(0, 0, false, null, null);
    CheckBox cb0 = (CheckBox) view0.findViewById(R.id.checkBox);
    cb0.setChecked(true);
    cb0.setWillNotDraw(false);
    cb0.invalidate();

    Toast.makeText(this, "button clicked", Toast.LENGTH_SHORT).show();
}



public void createData() {

        Group group = new Group("Test ");
        for (int i = 0; i < 5; i++) {
            group.children.add("Sub Item" + i);
        }
        groups.append(0, group);

}

}

Answer 1

您可以像这样以编程方式检查复选框...

cb0.post(new Runnable() {
            @Override
            public void run() {
                cb0.setChecked(true);
            }
        });

如何以编程方式检查Android中的Checkbox？

1 个答案: