Android - View 未正确对齐

Question

这是我的代码:

  rl=(RelativeLayout)findViewById(R.id.ScoreLayout);


    rtb=new RatingBar(this);
    rl.addView(rtb);
    rtb.setNumStars(5);
    rtb_params=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
    rtb_params.addRule(RelativeLayout.CENTER_HORIZONTAL);
    rtb_params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
    rtb.setLayoutParams(rtb_params);


    txt1=new TextView(this);
    rl.addView(txt1);
    txt1.setSingleLine();
    txt1.setTextSize(TypedValue.COMPLEX_UNIT_PX,15);
    txt1.setText("Best Score: ");
    txt1_params=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
    txt1_params.addRule(RelativeLayout.ALIGN_TOP, rtb.getId());
    txt1_params.addRule(RelativeLayout.CENTER_HORIZONTAL);
    txt1.setLayoutParams(txt1_params);


    txt2=new TextView(this);
    rl.addView(txt2);
    txt2.setSingleLine();
    txt2.setTextSize(TypedValue.COMPLEX_UNIT_PX,30);
    txt2.setText(String.valueOf(DataBase.HighScore));
    txt2_params=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
    txt2_params.addRule(RelativeLayout.ALIGN_TOP, txt1.getId());
    txt2_params.addRule(RelativeLayout.CENTER_HORIZONTAL);
    txt2.setLayoutParams(txt1_params);


    txt3=new TextView(this);
    rl.addView(txt3);
    txt3.setSingleLine();
    txt3.setTextSize(TypedValue.COMPLEX_UNIT_PX,15);
    txt2.setText("Current Score: ");
    txt3_params=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
    txt3_params.addRule(RelativeLayout.ALIGN_TOP, txt2.getId());
    txt3_params.addRule(RelativeLayout.CENTER_HORIZONTAL);
    txt3.setLayoutParams(txt1_params);


    txt4=new TextView(this);
    rl.addView(txt4);
    txt4.setSingleLine();
    txt4.setTextSize(TypedValue.COMPLEX_UNIT_PX,30);
    txt4.setText(String.valueOf(DataBase.score));
    txt4_params=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
    txt4_params.addRule(RelativeLayout.ALIGN_TOP, txt3.getId());
    txt4_params.addRule(RelativeLayout.CENTER_HORIZONTAL);
    txt4.setLayoutParams(txt1_params);


    btn1=new Button(this);
    rl.addView(btn1);
    btn1_params=new RelativeLayout.LayoutParams(150,40);
    btn1_params.addRule(RelativeLayout.CENTER_HORIZONTAL);
    btn1_params.topMargin=DataBase.Layout_Height-80-80;//first 80 for the advertisment Bar and second for the two 40-height-buttons
    btn1.setLayoutParams(btn1_params);


    btn2=new Button(this);
    rl.addView(btn2);
    btn2_params=new RelativeLayout.LayoutParams(150,40);
    btn2_params.addRule(RelativeLayout.CENTER_HORIZONTAL);
    btn2_params.addRule(RelativeLayout.ALIGN_TOP, btn1.getId());
    btn2.setLayoutParams(btn2_params);

虽然这些 View 应该水平居中并且很有策略，但它们看起来像这样:

http://postimg.org/image/peqhzw0uh/

我希望每个 View 都在另一个 View 之下，并且所有 View 都应该水平居中! RatingBar(rtb) 应该在上面，下面应该是

txt1-->txt2-->txt3-->txt4-->btn1-->btn2

我花了很多时间来查询这个问题，但我找不到为什么会这样的答案谢谢你的帮助:)

Answer 1

您需要为您的 View setId() 一些标识符，以便ALIGN_TOP, view.getId() 规则实际执行某些操作。

尽管 ALIGN_TOP 只对齐 View 的顶部，使 View 在彼此之上绘制。请改用 LAYOUT_BELOW 规则或 LinearLayout。

对于 View ID，任何大于 0 的整数都可以。只需确保 ID 不同，以便 RelativeLayout 可以找到您所指的正确 View 。

对于 Android Studio 的“Expected resource of type Id”错误，使用 @IdRes 注释将您的整数注释为资源标识符。例如，

@android.support.annotation.IdRes int id = 1;
view.setId(id); // no error

id++; // next id
view2.setId(id); // and so on

...虽然在这种情况下，LinearLayout 将首先避免生成 id 的需要。