android - 如何将视图动态添加到已在 xml 布局中声明的 RelativeLayout？

Question

RelativeLayout我在 xml 布局文件中声明了a 。现在我想将Views代码添加到现有的布局中。我Button通过代码向这个现有布局动态添加了一个，如下所示：

rLayout = (RelativeLayout)findViewById(R.id.rlayout); 
        LayoutParams lprams = new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
        Button tv1 = new Button(this); 
        tv1.setText("Hello"); 
        tv1.setLayoutParams(lprams); 
        tv1.setId(1); 
        rLayout.addView(tv1); 

现在我需要Button在已经添加的右侧添加另一个Button. 我找不到将新按钮添加到先前添加的按钮右侧的方法。

Answer 1

RelativeLayout.RIGHT_OF添加第二个添加的规则Button LayoutParams：

    // first Button
    RelativeLayout rLayout = (RelativeLayout) findViewById(R.id.rlayout);
    RelativeLayout.LayoutParams lprams = new RelativeLayout.LayoutParams(
            RelativeLayout.LayoutParams.WRAP_CONTENT,
            RelativeLayout.LayoutParams.WRAP_CONTENT);
    Button tv1 = new Button(this);
    tv1.setText("Hello");
    tv1.setLayoutParams(lprams);
    tv1.setId(1);
    rLayout.addView(tv1);

    // second Button
    RelativeLayout.LayoutParams newParams = new RelativeLayout.LayoutParams(
            RelativeLayout.LayoutParams.WRAP_CONTENT,
            RelativeLayout.LayoutParams.WRAP_CONTENT);
    Button tv2 = new Button(this);
    tv1.setText("Hello2");
    newParams.addRule(RelativeLayout.RIGHT_OF, 1);
    tv2.setLayoutParams(newParams);
    tv2.setId(2);
    rLayout.addView(tv2);

Answer 2

也许这可以帮助你，试试吧。

rLayout = (RelativeLayout)findViewById(R.id.rlayout);
LayoutParams lprams = new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);

TableLayout tl=new TableLayout(this);
rLayout.addView(tl); 

TableRow tr1=new TableRow(this);
tl.addView(tr1);

Button btn1 = new Button(this);
btn1.setText("Hello");
btn1.setLayoutParams(lprams);
btn1.setId(1);
tr1.addView(btn1);

TextView tv1 = new TextView(this); 
tv1.setWidth(40);
tv1.setHeight(LayoutParams.WRAP_CONTENT);
tr1.addView(tv1);


Button btn2 = new Button(this);
btn2.setText("World");
btn2.setLayoutParams(lprams);
btn2.setId(2);
tr1.addView(btn2);

Answer 3

创建另一个按钮：

Button tv2 = new Button(this);
tv2.setText("World");
tv2.setLayoutParams(lprams);
tv2.setId(2);

将其添加到您的 RelativeLayout：

rLayout.addView(tv2);