How to dynamically set layout parameters in Android?

问题

I have these text fields which I generated dynamically. But I can't seem to set layout parameters for them. Please tell me what I'm doing wrong.

I'm able to generate the fields without layout parameters. However, If I use LayoutParams, it doesn't even get generated.

Code:

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);

回答1:

You are adding Table Row into table so use TableLayout.LayoutParams instead of LinearLayout.LayoutParams.As we use LayoutParam according to parent in which we are going to add

回答2:

You have to use TableRow.LayoutParams instead of LinearLayout.LayoutParams

Replace your code

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

with the below code.

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

Its working fine. Let me know what happened. :-)

来源：https://stackoverflow.com/questions/9079469/how-to-dynamically-set-layout-parameters-in-android