android动态布局之动态加入TextView和ListView的方法

本文实例讲述了android动态布局之动态加入textview和listview的方法。分享给大家供大家参考。具体实现方法如下：

package org.guoshi; 
import java.util.arraylist; 
import java.util.hashmap; 
import java.util.list; 
import java.util.map; 
import org.guoshi.adapter.imageandtextadapter; 
import android.app.activity; 
import android.graphics.color; 
import android.os.bundle; 
import android.util.log; 
import android.view.view; 
import android.view.view.onclicklistener; 
import android.view.viewgroup.layoutparams; 
import android.widget.linearlayout; 
import android.widget.listadapter; 
import android.widget.listview; 
import android.widget.relativelayout; 
import android.widget.textview; 
public class main extends activity { 
 /** called when the activity is first created. */ 
 @override 
 public void oncreate(bundle savedinstancestate) { 
  super.oncreate(savedinstancestate); 
  setcontentview(r.layout.friend_info_view);  
  final linearlayout linearlayout = (linearlayout) findviewbyid(r.id.groups); 
  final listview lv = new listview(this); 
  list<map<string, object>> data = new arraylist<map<string, object>>(); 
  map<string, object> map = new hashmap<string, object>(); 
  map.put("title", "jayqean"); 
  map.put("imgsrc", r.drawable.icon); 
  data.add(map); 
  listadapter adapter = new imageandtextadapter(main.this, data, r.layout.chats_view_item, new string[] { "title", "imgsrc" }, new int[] { 
    r.id.chats_view_name, 
    r.id.chats_view_item_image }); 
  lv.setadapter(adapter); 
  final textview tv1 = new textview(this); 
  tv1.settext("常用联系人"); 
  tv1.setid(1); 
  final relativelayout.layoutparams lp1 = new relativelayout.layoutparams(layoutparams.fill_parent, layoutparams.wrap_content); 
  lp1.addrule(relativelayout.below, r.id.groups); 
  tv1.setlayoutparams(lp1); 
  tv1.setbackgroundcolor(r.color.group_view_background); 
  tv1.setonclicklistener(new onclicklistener() { 
   boolean flag = false; 
   @override 
   public void onclick(view v) { 
    // todo auto-generated method stub 
    log.d("tag", tv1.gettext().tostring()); 
    if(!flag){ 
     linearlayout.addview(lv, linearlayout.indexofchild(tv1) + 1); 
//     lp1.addrule(relativelayout.below, 1); 
//     linearlayout.addview(lv, lp1); 
     flag = true; 
    } else{ 
     linearlayout.removeview(lv); 
     flag = false; 
    } 
   } 
  }); 
  linearlayout.addview(tv1, lp1);
  // 线性布局 通过参数index控制加入的控件的位置 
  // ------------------------ 
  // 加入分割线 
  final textview line = new textview(this); 
  line.setlayoutparams(new layoutparams(layoutparams.fill_parent, 1)); 
  line.setbackgroundcolor(color.white); 
  linearlayout.addview(line, 1); 
  // ------------------------ 
  final listview lv2 = new listview(this); 
  list<map<string, object>> data2 = new arraylist<map<string, object>>(); 
  map<string, object> map2 = new hashmap<string, object>(); 
  map2.put("title", "xiaobei"); 
  map2.put("imgsrc", r.drawable.icon); 
  data2.add(map2); 
  listadapter adapter2 = new imageandtextadapter(main.this, data2, r.layout.chats_view_item, new string[] { "title", "imgsrc" }, new int[] { 
    r.id.chats_view_name, 
    r.id.chats_view_item_image }); 
  lv2.setadapter(adapter2); 
  final textview tv2 = new textview(this); 
  tv2.settext("离线好友");   
  tv2.setlayoutparams(new layoutparams(layoutparams.fill_parent, layoutparams.wrap_content)); 
  tv2.setbackgroundcolor(r.color.group_view_background); 
  tv2.setonclicklistener(new onclicklistener() { 
   boolean flag = false; 
   @override 
   public void onclick(view v) { 
    // todo auto-generated method stub 
    log.d("tag", tv2.gettext().tostring()); 
    if(!flag){ 
     linearlayout.addview(lv2, linearlayout.indexofchild(tv2) + 1); 
     flag = true; 
    } else{ 
     linearlayout.removeview(lv2); 
     flag = false; 
    } 
   } 
  }); 
  linearlayout.addview(tv2, 2); 
 }
}

控制布局,可以通过relativelayout.layoutparams类

final linearlayout linearlayout = (linearlayout) findviewbyid(r.id.groups);
final textview tv1 = new textview(this);
tv1.settext("常用联系人");
relativelayout.layoutparams lp1 = new relativelayout.layoutparams(layoutparams.fill_parent, layoutparams.wrap_content);
lp1.addrule(relativelayout.below, r.id.groups);
tv1.setlayoutparams(lp1);
linearlayout.addview(tv1, lp1);

也可采用linearlayout.addview(tv1, 0); // 线性布局 通过参数index控制加入的控件的位置

package org.guoshi.adapter; 
import java.util.list; 
import java.util.map; 
import android.content.context; 
import android.graphics.bitmap; 
import android.graphics.bitmapfactory; 
import android.util.log; 
import android.view.layoutinflater; 
import android.view.view; 
import android.view.view.onclicklistener; 
import android.view.viewgroup; 
import android.widget.checkable; 
import android.widget.imageview; 
import android.widget.simpleadapter; 
import android.widget.textview; 
public class imageandtextadapter extends simpleadapter { 
 private context mcontext; 
 private int[] mto; 
 private string[] mfrom; 
 private viewbinder mviewbinder; 
 private list<? extends map<string, ?>> mdata; 
 private int mresource; 
 private layoutinflater minflater; 
 public imageandtextadapter(context context, 
   list<? extends map<string, ?>> data, int resource, string[] from, 
   int[] to) { 
  super(context, data, resource, from, to); 
  mcontext = context; 
  mdata = data; 
  mresource = resource; 
  mfrom = from; 
  mto = to; 
  minflater = (layoutinflater) context 
    .getsystemservice(context.layout_inflater_service); 
//  minflater = layoutinflater.from(mcontext); 
 } 
 /** 
  * @see android.widget.adapter#getview(int, view, viewgroup) 
  */ 
 public view getview(int position, view convertview, viewgroup parent) { 
  return createviewfromresource(position, convertview, parent, mresource); 
 } 
 private view createviewfromresource(int position, view convertview,
   viewgroup parent, int resource) { 
  view v; 
  if (convertview == null) { 
   v = minflater.inflate(resource, parent, false); 
   final int[] to = mto; 
   final int count = to.length; 
   final view[] holder = new view[count]; 
   for (int i = 0; i < count; i++) { 
    holder[i] = v.findviewbyid(to[i]); 
   } 
   v.settag(holder); 
  } else { 
   v = convertview; 
  } 
  bindview(position, v); 
//  final int index = position; 
//  v.setonclicklistener(new onclicklistener() { 
//   
//   public void onclick(view v) { 
//    // todo auto-generated method stub 
//    log.d("item", index + ""); 
//   } 
//  }); 
  return v; 
 } 
 private void bindview(int position, view view) { 
  final map<string, ?> dataset = mdata.get(position); 
  if (dataset == null) { 
   return; 
  } 
  final viewbinder binder = mviewbinder; 
  final view[] holder = (view[]) view.gettag(); 
  final string[] from = mfrom; 
  final int[] to = mto; 
  final int count = to.length; 
  for (int i = 0; i < count; i++) { 
   final view v = holder[i]; 
   if (v != null) { 
    final object data = dataset.get(from[i]); 
    string text = data == null ? "" : data.tostring(); 
    if (text == null) { 
     text = ""; 
    } 
    boolean bound = false; 
    if (binder != null) { 
     bound = binder.setviewvalue(v, data, text); 
    } 
    if (!bound) { 
     if (v instanceof checkable) { 
      if (data instanceof boolean) { 
       ((checkable) v).setchecked((boolean) data); 
      } else { 
       throw new illegalstateexception(v.getclass() 
         .getname() 
         + " should be bound to a boolean, not a " 
         + data.getclass()); 
      } 
     } else if (v instanceof textview) { 
      setviewtext((textview) v, text); 
     } else if (v instanceof imageview) { 
      if (data instanceof integer) { 
       setviewimage((imageview) v, (integer) data); 
      } else { 
       setviewimage((imageview) v, text); 
      } 
     } else { 
      throw new illegalstateexception( 
        v.getclass().getname() 
          + " is not a " 
          + " view that can be bounds by this simpleadapter"); 
     } 
    } 
   } 
  } 
 } 
 /** 
  * called by bindview() to set the image for an imageview but only if there 
  * is no existing viewbinder or if the existing viewbinder cannot handle 
  * binding to an imageview. 
  * 
  * this method is called instead of {@link #setviewimage(imageview, string)} 
  * if the supplied data is an int or integer. 
  * 
  * @param v 
  *   imageview to receive an image 
  * @param value 
  *   the value retrieved from the data set 
  * 
  * @see #setviewimage(imageview, string) 
  */ 
 public void setviewimage(imageview v, int value) { 
  v.setimageresource(value); 
 } 
 /** 
  * called by bindview() to set the image for an imageview but only if there 
  * is no existing viewbinder or if the existing viewbinder cannot handle 
  * binding to an imageview. 
  * 
  * by default, the value will be treated as an image resource. if the value 
  * cannot be used as an image resource, the value is used as an image uri. 
  * 
  * this method is called instead of {@link #setviewimage(imageview, int)} if 
  * the supplied data is not an int or integer. 
  * 
  * @param v 
  *   imageview to receive an image 
  * @param value 
  *   the value retrieved from the data set 
  * 
  * @see #setviewimage(imageview, int) 
  */ 
 public void setviewimage(imageview v, string value) { 
  bitmap bitmap = bitmapfactory.decodefile(value); 
  v.setimagebitmap(bitmap); 
 } 
}

下面是friend_info_view.xml

<?xml version="1.0" encoding="utf-8"?> 
<!-- 好友信息列表.xml --> 
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical" android:layout_width="fill_parent" 
 android:layout_height="fill_parent" android:background="#ffffff"> 
 <relativelayout android:layout_width="wrap_content" 
  android:layout_height="wrap_content"> 
  <imageview android:id="@+id/selfimage" 
   android:adjustviewbounds="true" android:layout_width="@dimen/self_image_width" 
   android:layout_height="@dimen/self_image_height" 
   android:layout_marginleft="5.0dip" android:layout_marginbottom="10.0dip" 
   android:layout_margintop="3.0dip" android:src="@drawable/default_image" /> 
  <imageview android:id="@+id/currentstatus" 
   android:layout_width="wrap_content" android:layout_height="wrap_content" 
   android:src="@drawable/status_available" android:layout_marginleft="8.0dip" 
   android:layout_margintop="20.0dip" android:layout_torightof="@id/selfimage" /> 
  <textview android:id="@+id/setstatus" android:layout_width="wrap_content" 
   android:layout_height="wrap_content" android:layout_margintop="20.0dip" 
   android:layout_marginleft="8.0dip" android:text="tap here to set your status" 
   android:layout_torightof="@+id/currentstatus" /> 
 </relativelayout> 
 <edittext android:id="@+id/searchfriend" 
  android:adjustviewbounds="true" android:layout_height="50dip" 
  android:layout_width="fill_parent" android:text="search..." /> 
 <!-- 好友组 点击textview后出现组里的详细好友列表 --> 
 <linearlayout android:id="@+id/groups" android:layout_width="fill_parent" 
  android:layout_height="wrap_content" android:orientation="vertical" >  
 </linearlayout> 
</linearlayout>

chats_view_item.xml

<?xml version="1.0" encoding="utf-8"?> 
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" 
 android:orientation="vertical" android:layout_width="fill_parent" 
 android:layout_height="fill_parent" android:background="@color/white"> 
 <relativelayout android:id="@+id/chats_view_item" 
  android:layout_width="wrap_content" android:layout_height="wrap_content"> 
  <imageview android:id="@+id/chats_view_item_image" 
   android:layout_width="@dimen/friend_image_width" 
   android:layout_height="@dimen/friend_image_height" 
   android:paddingleft="5.0dip" android:paddingtop="2.0dip" 
   android:src="@drawable/default_image" /> 
  <textview android:id="@+id/chats_view_name" android:textsize="14.0sp" 
   android:paddingleft="10.0dip" android:textstyle="bold" 
   android:ellipsize="marquee" android:layout_width="wrap_content" 
   android:layout_height="wrap_content" android:text="username" 
   android:singleline="true" android:paddingtop="2.0dip" 
   android:layout_torightof="@+id/chats_view_item_image" /> 
  <imageview android:id="@+id/friend_status_icon" 
   android:layout_width="wrap_content" android:layout_height="wrap_content" 
   android:paddingleft="10.0dip" android:paddingtop="1.0dip" 
   android:layout_below="@+id/chats_view_name" android:layout_torightof="@+id/chats_view_item_image" 
   android:src="@drawable/jabber_available" /> 
  <textview android:id="@+id/chats_view_status" 
   android:textcolor="@android:color/secondary_text_light" 
   android:ellipsize="marquee" android:layout_width="fill_parent" 
   android:layout_height="wrap_content" android:text="available" 
   android:singleline="true" android:paddingleft="2.0dip" 
   android:layout_torightof="@+id/friend_status_icon" 
   android:layout_below="@+id/chats_view_name" /> 
 </relativelayout> 
</linearlayout>

效果图如下:

希望本文所述对大家的android程序设计有所帮助。