这几天,开始一个项目,需要一个小效果,就是一个输入邮箱地址的EditTest 需要动态的添加。默认有两个,然后最多5个,手机的屏幕总是有限的

好的 ,这就上代码了

布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"
android:orientation="vertical"> <TextView android:text="@string/hello_world" android:layout_width="wrap_content"
android:layout_height="wrap_content" /> <LinearLayout
android:id="@+id/layout_ll"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"> <EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="1"/> <EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="2"/> </LinearLayout> <Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="添加"
android:onClick="onInsert"/> <Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="最后一个Edit的数据"
android:onClick="onLast"/>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="倒数第二个Edit的数据"
android:onClick="onFast"/> </LinearLayout>

  这里时用一个有ID 的  LinearLayout   后面拿到它,向它加入EditTest 就OK了。

java 代码

package com.quseit.listedit.listedit;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.Toast; public class MainActivity extends ActionBarActivity {
private LinearLayout layout_ll;
private int edit_i=0;
private String[] Param; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
} public void initView(){
layout_ll=(LinearLayout)findViewById(R.id.layout_ll);
} public void setEdit(){
EditText edit_l=new EditText(this);
edit_i++;
edit_l.setTag(edit_i);
edit_l.setHint(edit_i + "");
edit_l.setText(edit_i + "zheshi");
layout_ll.addView(edit_l);
} @Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
} @Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId(); //noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
} return super.onOptionsItemSelected(item);
} public void onInsert(View v){
setEdit();
} public void onLast(View v){
int i=layout_ll.getChildCount();
EditText e =(EditText)layout_ll.getChildAt(i-1);
Toast.makeText(this,e.getText().toString()+":"+i,Toast.LENGTH_SHORT).show(); }
public void onFast(View v){
int i=layout_ll.getChildCount();
EditText e =(EditText)layout_ll.getChildAt(i-2);
Toast.makeText(this,e.getText().toString()+":"+i,Toast.LENGTH_SHORT).show();
} public void getEditstr(){
int edit_i=layout_ll.getChildCount();
if(edit_i>0) {
for (int i = 0; i < edit_i; i++) {
EditText edit = (EditText) layout_ll.getChildAt(i);
}
} } }

其实,实现还是很简单的,只需要 getChildAt()  一下 拿到 LinearLayout里面的 节点  注意LinearLayout最好只放EditTest

04-15 09:35