如何在Android中动态设置布局参数？

Question

我有动态生成的这些文本字段.但我似乎无法为它们设置布局参数.请告诉我我做错了什么.

我能够生成没有布局参数的字段.但是,如果我使用LayoutParams,它甚至不会生成.

码:

TableLayout table = (TableLayout) findViewById(R.id.TableLayout1);

TableRow tr = new TableRow(this);
LinearLayout.LayoutParams trparams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
tr.setLayoutParams(trparams);

cg[i] = new EditText(this);
weight[i] = new EditText(this);
cg[i].setInputType(InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_FLAG_DECIMAL);
weight[i].setInputType(InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_FLAG_DECIMAL);

//Here's where it goes wrong. By adding fieldparams, the text field doesn't even get generated.
LinearLayout.LayoutParams fieldparams = new LinearLayout.LayoutParams(10, LinearLayout.LayoutParams.WRAP_CONTENT, 1.0f);
tr.addView(cg[i], fieldparams);
tr.addView(weight[i], fieldparams);

table.addView(tr);

Answer 1

您正在将表行添加到表中,因此请使用TableLayout.LayoutParams而不是LinearLayout.LayoutParams.我们根据要添加的父级使用LayoutParam

Answer 2

您必须使用TableRow.LayoutParams而不是LinearLayout.LayoutParams

替换你的代码

LinearLayout.LayoutParams fieldparams = new LinearLayout.LayoutParams(10, LinearLayout.LayoutParams.WRAP_CONTENT, 1.0f);

使用以下代码.

TableRow.LayoutParams fieldparams = new TableRow.LayoutParams(10, TableRow.LayoutParams.WRAP_CONTENT, 1.0f);

它的工作正常.让我知道发生了什么.:-)