Android在单击(+)按钮时添加edittext字段,并通过单击(-)删除 [英] Android add edittext field on click of (+) button and remove by click of (-)
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问题描述
我正在创建一个添加联系人活动.只有一个编辑文本和一个按钮(+),当单击按钮时,应添加另一个编辑文本,并且上一个按钮应更改为(-).通过这种方法,我想添加和删除编辑文本字段.类似这样的事情.我正在这样做,但是无法实现我想要的.有什么主意吗?
I am creating a add contact activity. There will be only one edit text and a button (+), when click on button then another edit text should be added and previous button should change into (-). By this method i want to add and remove edit text fields.Some thing like this. I am doing like this but not able to achieve that i want. Any idea?
public class TextField extends Activity {
Context con;
TableLayout table;
TableRow tr[] = new TableRow[6];
EditText txt[] = new EditText[6];
//ImageView img[] = new ImageView[5];
Button img[]=new Button[6];
int count ;
int lastDeletedIndex;
int lastPopulatedIndex;
boolean isDel;
public void onCreate(Bundle obj) {
super.onCreate(obj);
// Log.d("","On Create");
con = this;
count = 1;
table = new TableLayout(this);
tr[count] = new TableRow(this);
tr[count].setId(count);
tr[count].setLayoutParams(new TableRow.LayoutParams( LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
txt[count] = new EditText(this);
txt[count].setId(count);
txt[count].setText("1");
txt[count].setMaxLines(1);
txt[count].setWidth(160);
img[count] = new Button(this);
img[count].setId(count);
img[count].setText("+");
img[count].setBackgroundResource(R.drawable.add);
img[count].setPadding(5, 7, 20, 0);
tr[count].addView(txt[count]);
tr[count].addView(img[count]);
tr[count].setPadding(20, 20, 0, 0);
img[count].setOnClickListener(new OnClick(img[count]));
table.addView(tr[count]);
setContentView(table);
}
class OnClick implements OnClickListener {
View view;
Button addIcon;
public OnClick(View view) {
this.addIcon = (Button) view;
}
@Override
public void onClick(View arg0) {
int id=addIcon.getId();
if(addIcon.getText().toString().equals("-"))
{
if ((id >1 )) {
isDel=true;
count=id;
lastDeletedIndex=id;
txt[count]=null;
img[count]=null;
table.removeView(tr[count]);
tr[count]=null;
Log.d("", "Cancel img Id" + addIcon.getId());
}
} else {
if (count <5) {
if(table.getChildCount()!=5)
{
addIcon.setBackgroundDrawable(getResources().getDrawable(R.drawable.delete));
addIcon.setText("-");
addIcon.setId(count);
if(!isDel) {
count++;
}else
{
count=lastDeletedIndex;
}
tr[count] = new TableRow(con);
tr[count].setId(count);
img[count] = new Button(con);
img[count].setId(count);
img[count].setBackgroundDrawable(getResources().getDrawable(R.drawable.add));
img[count].setText("+");
img[count].setPadding(3, 7, 20, 0);
img[count].setOnClickListener(new OnClick(img[count]));
txt[count] = new EditText(con);
txt[count].setId( count);
txt[count].setText(""+count);
txt[count].setMaxLines(1);
txt[count].setWidth(160);
tr[count].addView(txt[count]);
tr[count].addView(img[count]);
tr[count].setPadding(20, 20, 0, 0);
table.addView(tr[count]);
setContentView(table);
isDel=false;
lastPopulatedIndex=count;
Log.d("", "Cancel img Id" + addIcon.getId());
}
} else
ShowDialog.showAlert("Info","You can't add more than 5 contacts!", con);
}
}
}
推荐答案
private void addEditView() {
// TODO Auto-generated method stub
LinearLayout li=new LinearLayout(this);
EditText et=new EditText(this);
Button b=new Button(this);
b.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int pos=(Integer) v.getTag();
mainLayout.removeViewAt(pos);
}
});
b.setTag((mainLayout.getChildCount()+1));
}
当您单击addEditText按钮时,请调用此函数.
call this function when you click on a addEditText button.
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