Android 如何将视图动态添加到已在 xml 布局中声明的 RelativeLayout？
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How to add views dynamically to a RelativeLayout already declared in the xml layout?
提问by user1276092
I declared a RelativeLayoutin a xml layout file. Now I want to add Viewsfrom code to the existing Layout. I added a Buttondynamically to this existing layout as below through code:
我RelativeLayout在 xml 布局文件中声明了a 。现在我想Views从代码添加到现有的布局。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);
Now I need to add another Buttonto the right of the already added Button. I am not able to find the way in which I can add the new one to the right of the previously added button.
现在我需要Button在已经添加的Button. 我无法找到将新按钮添加到先前添加的按钮右侧的方法。
回答by Luksprog
Add the rule RelativeLayout.RIGHT_OFfor the second added ButtonLayoutParams:
添加RelativeLayout.RIGHT_OF第二个添加的规则ButtonLayoutParams：
// 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);
回答by user1208720
may be this can help you, try it.
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);
回答by rizzz86
Create another button:
创建另一个按钮：
Button tv2 = new Button(this);
tv2.setText("World");
tv2.setLayoutParams(lprams);
tv2.setId(2);
Add add it into your RelativeLayout:
添加将其添加到您的 RelativeLayout 中：
rLayout.addView(tv2);
