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. */@Overridepublic 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;@Overridepublic 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;@Overridepublic 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。