android - 以编程方式的相对布局位置

Question

我正在尝试使用相对布局添加不同的视图。添加了edittext和微调器，但列表视图未显示。另外，我没有使用xmls进行布局

public class CustomView extends LinearLayout {
    Context rContext;
    private String rTitle;

    private Spinner rSpinner;
    private EditText rInput;
    private ListView rResultsList;

    public CustomView(Context context) {
        super(context);
        rContext = context;
    }

    public CustomView(Context context, AttributeSet attrs, int theme) {
        super(context, attrs, theme);
    }

    public void initialize(String title) {

        rTitle = title;
        rInput = new EditText(rContext);
        rInput.setId(1);
        rSpinner = new Spinner(rContext);
        rSpinner.setId(2);
        rResultsList = new ListView(rContext);
        rResultsList.setId(3);
        rInput.setText("1");

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(rContext, R.layout.result_item, R.id.result_item, new String[] { "this", "that" });
        rResultsList.setAdapter(adapter);
        addViews();
    }

    @Override
    public String toString() {

        return rTitle;
    }

    private void addViews() {

        RelativeLayout.LayoutParams relativeParams = new RelativeLayout.LayoutParams(ConvertoActivity.APP_WIDTH / 2, 100);
        relativeParams.addRule(RelativeLayout.RIGHT_OF, rInput.getId());

        RelativeLayout.LayoutParams relativeParams2 = new RelativeLayout.LayoutParams(ConvertoActivity.APP_WIDTH / 2, 100);
        relativeParams.addRule(RelativeLayout.LEFT_OF, rSpinner.getId());

        RelativeLayout.LayoutParams relativeParams3 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
        relativeParams.addRule(RelativeLayout.BELOW, rInput.getId());

        this.addView(rInput, relativeParams2);
        this.addView(rSpinner, relativeParams);
        this.addView(rResultsList, relativeParams3);


    }
}

Answer 1

您的自定义视图扩展了 LinearLayout 并且您正在使用 RelativeLayout.Layout 参数。更改您的自定义视图以扩展 RelativeLayout。

Answer 2

没关系，我找到了答案。我正在向相对参数的同一对象添加规则。