Question

我在View类中创建一个不会破坏程序的工作布局时遇到问题。我认为代码中的所有内容都已正确完成，但可能有一些我不知道的设置，我希望你们能向我揭示这一点。

我正在尝试使用“清除”按钮和RadioGroup绘制视图。

首先，所有这一切都运行良好，但两个添加的内容视图（btnReset =“Clear”，btnScale = RadioGroup）相互遮挡。这就是为什么我想添加一个父布局，所以我可以轻松管理这些视图。

File1.java

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);     
    DrawView tv = new DrawView(this);
    setContentView(tv);
    addContentView(tv.btnReset, tv.params);
    addContentView(tv.btnScale, tv.paramsRadio);}

DrawView.java

public class DrawView extends View {

    public Button btnReset;
    public RelativeLayout.LayoutParams params;
    public RelativeLayout.LayoutParams paramsRadio;
    public RadioGroup btnScale;

 public DrawView(Context context) {
            super(context);

    btnReset = new Button(context);
    btnReset.setText("Clear Screen");

    btnScale = new RadioGroup(context);
    btnScale.setOrientation(RadioGroup.HORIZONTAL);

    params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
    RelativeLayout.LayoutParams.WRAP_CONTENT);

   paramsRadio = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
   RelativeLayout.LayoutParams.WRAP_CONTENT);

我省略了大部分代码，因为我觉得它无关紧要，一切正常，但布局。

无论如何，当我尝试创建一个布局时，我只需添加一些代码：

更改了File1.java

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);     
    DrawView tv = new DrawView(this);
    setContentView(tv);
    addContentView(tv.layout, tv.params); }

更改了DrawView.java

public class DrawView extends View {
    public Button btnReset;
    public RelativeLayout.LayoutParams params;
    public RelativeLayout.LayoutParams paramsRadio;
    public RelativeLayout layout;
    public RadioGroup btnScale;

 public DrawView(Context context) {
            super(context);

    btnReset = new Button(context);
    btnReset.setText("Clear Screen");

    btnScale = new RadioGroup(context);
    btnScale.setOrientation(RadioGroup.HORIZONTAL);

    params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
    RelativeLayout.LayoutParams.WRAP_CONTENT);

   paramsRadio = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
   RelativeLayout.LayoutParams.WRAP_CONTENT);

   layout.addView(btnReset, params);
   layout.addView(btnScale, paramsRadio);

我认为它应该像魅力一样工作，但不幸的是，当我尝试用新创建的布局做任何事情时，我的应用程序崩溃了。该代码有什么问题？

Answer 1

好吧，经过长时间的战斗，我设法解决了我自己的问题：D我没有这样做，就像@pskink建议的那样，因为老实说对我来说太先进了。我找到了更简单的解决方案。

问题是，你可以在DrawView.java中创建尽可能多的视图，但在File1.java中创建的Layout中对它们进行排序！

就像那样： File1.java

protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);     
     LinearLayout ll = new LinearLayout(this);
     ll.setOrientation(LinearLayout.VERTICAL);  
     DrawView tv = new DrawView(this);
     ll.addView(tv.btnReset, tv.params);
     ll.addView(tv.btnScale, tv.paramsRadio);
     ll.addView(tv);
     setContentView(ll);

DrawView.java保持不变：

 public class DrawView extends View {

    public Button btnReset;
    public LinearLayout.LayoutParams params;
    public LinearLayout.LayoutParams paramsRadio;
    public RadioGroup btnScale;

 public DrawView(Context context) {
            super(context);

    btnReset = new Button(context);
    btnReset.setText("Clear Screen");

    btnScale = new RadioGroup(context);
    btnScale.setOrientation(RadioGroup.HORIZONTAL);

    params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,
    LinearLayout.LayoutParams.WRAP_CONTENT);

   paramsRadio = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,
   LinearLayout.LayoutParams.WRAP_CONTENT);

如何以编程方式使RelativeLayout工作

1 个答案: