Question

我在xml布局文件中声明了RelativeLayout。现在我想从代码中将Views添加到现有布局中。我通过以下代码动态地向此现有布局添加了Button：

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);

现在我需要在已添加的Button的右侧添加另一个Button。我无法找到在以前添加的按钮右侧添加新的方式。

Answer 1

为添加的第二个RelativeLayout.RIGHT_OF Button添加规则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

可能会帮助你，尝试一下。

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);

添加将其添加到RelativeLayout：

rLayout.addView(tv2);

如何动态地将视图添加到已在xml布局中声明的RelativeLayout？

3 个答案: