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ListView实现RadioButton的功能有bug改进

Sat, 22 Feb 2014 14:58:00 GMT

前言�Q�之前做的ListView实现RadioButton的功能有bug,当ListView控�g的内容超出屏�q�可见区域时�Q�滑动ListView控�g会报错，下面有�ؓ什么出错和解决�Ҏ��q�行的注解，不多说了�Q�看源码�Q�有更好的解军_��法请指教

1�Q�MainActivity.java

package com.excetop.listradio;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.ListView;
import android.widget.RadioButton;
import android.widget.CompoundButton.OnCheckedChangeListener;

public class MainActivity extends Activity {
    private static final String TAG = "MainActivity";
    private ListView listView;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        listView = (ListView) this.findViewById(R.id.list);
        MyAdapter adapter = new MyAdapter();
        listView.setAdapter(adapter);
    }
    private class MyAdapter extends BaseAdapter{
        private String[] s = new String[]{"a","b","c","d","e","a","b","c","d","e","a","b","c","d","e","a","b","c","d","e"};
        private int temp = -1;

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return s.length;
        }

        @Override
        public Object getItem(int position) {
            // TODO Auto-generated method stub
            return null;
        }

        @Override
        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return 0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            convertView = MainActivity.this.getLayoutInflater().inflate(R.layout.item, null);  //解决办法�Q?每次都重新获取View
            Button button = (Button) convertView.findViewById(R.id.button);
            button.setText(s[position]);
            RadioButton radioButton = (RadioButton) convertView.findViewById(R.id.radioButton);
            radioButton.setId(position); //把position设�ؓradioButton的id
            radioButton.setOnCheckedChangeListener(new OnCheckedChangeListener() {

                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

                    if(isChecked){
                        //�q�段代码来实现单选功�?/font>
                        if(temp != -1){
                            RadioButton tempButton = (RadioButton) MainActivity.this.findViewById(temp);
                            if(tempButton != null){
                               tempButton.setChecked(false);
                            }

                        }

                        temp = buttonView.getId();
                        Log.i(TAG,"you are women- -   " + isChecked + "   " + temp);

                    }
                }
            });

            //�q�里实现单选框选的回显�Q�解决了单选框�U�d��屏幕范围未选中状�?/font>
            if(temp == position){
                radioButton.setChecked(true);
            }
            return convertView;
        }
//            Holder holder;
//            if(convertView == null){    //1�Q?font color="#ff0000">当第一�ơ加载ListView控�g�?nbsp; convertView为空
//                convertView = MainActivity.this.getLayoutInflater().inflate(R.layout.item, null); //所以当ListView控�g没有滑动旉��会执行这条语�?/font>
//                holder = new Holder();
//                convertView.setTag(holder);
//            }else{
//                holder = (Holder) convertView.getTag();
//            }
//
//            holder.button = (Button) convertView.findViewById(R.id.button);
//            holder.button.setText(s[position]);
//
//            holder.radioButton = (RadioButton) convertView.findViewById(R.id.radioButton);   //
//            holder.radioButton.setId(position);  //2�Q�因��里对radioButton的id�q�行重新讄��,滑动ListView时convertView不�ؓ�I�，上面的语句就没法得到radioButton对象�Q�这条语句就会报�I�指针异�?/font>

//            holder.radioButton.setOnCheckedChangeListener(new OnCheckedChangeListener() {
//
//                @Override
//                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
//
//                    if(isChecked){
//                        if(temp != -1){
//                            RadioButton tempButton = (RadioButton) MainActivity.this.findViewById(temp);
//                            tempButton.setChecked(false);
//
//                        }
//
//                        temp = buttonView.getId();
//                        Log.i(TAG,"you are women- -   " + isChecked + "   " + temp);
//
//                    }
//                }
//            });
//            return convertView;
//        }
//        private class Holder{
//            private Button button;
//            private RadioButton radioButton;
//        }
    }
}

2�Q�item.xml

xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
    android:id="@+id/button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="��试">



    android:id="@+id/radioButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />

3, main.xml

http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >

    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />
           android:id="@+id/list"
       android:layout_width="fill_parent"
       android:layout_height="fill_parent"
       />

何云�?/a> 2014-02-22 22:58 发表评论

listview与checkbox�l�合使用

Sat, 22 Feb 2014 14:56:00 GMT

一�Q�Layout

1�Q�main.xml

2�Q�item.xml

xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
    android:id="@+id/button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="��试">



    android:id="@+id/checkBox"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />

二，Activity

1�Q�MainActivity

package com.excetop.listradio;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.CompoundButton.OnCheckedChangeListener;

public class MainActivity extends Activity {
private static final String TAG = "MainActivity";
    private ListView listView;
    private Map checkMap;
@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        listView = (ListView) this.findViewById(R.id.list);

        checkMap = new HashMap();

        MyAdapter adapter = new MyAdapter();
        listView.setAdapter(adapter);

    }
private class MyAdapter extends BaseAdapter{
  private String[] s = new String[]{"a","b","c","d","e","a","b","c","d","e","a","b","c","d","e","a","b","c","d","e"};

  @Override
  public int getCount() {
   // TODO Auto-generated method stub
   return s.length;
  }

  @Override
  public Object getItem(int position) {
   // TODO Auto-generated method stub
   return null;
  }

  @Override
  public long getItemId(int position) {
   // TODO Auto-generated method stub
   return 0;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
   convertView = MainActivity.this.getLayoutInflater().inflate(R.layout.item, null); //解决办法�Q?每次都重新获取View
   Button button = (Button) convertView.findViewById(R.id.button);
   button.setText(s[position]);
   final CheckBox checkBox = (CheckBox) convertView.findViewById(R.id.checkBox);
   checkBox.setId(position); //把position设�ؓradioButton的id
   checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {

    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

     if(isChecked){

      checkMap.put(String.valueOf(checkBox.getId()), checkBox.getId());
//      Toast.makeText(MainActivity.this, String.valueOf( checkBox.getId()), 0).show();

     }else{
      checkMap.remove(String.valueOf(checkBox.getId()));
//      Toast.makeText(MainActivity.this, String.valueOf( checkBox.getId()), 0).show();
     }
    }
   });

   if(checkMap.get(String.valueOf(position)) != null){
    checkBox.setChecked(true);
//    Toast.makeText(MainActivity.this, String.valueOf(String.valueOf(position)), 0).show();
   }

   //�q�里实现单选框选的回显�Q�解决了单选框�U�d��屏幕范围未选中状�?br />   return convertView;
  }
}
}

何云�?/a> 2014-02-22 22:56 发表评论

处理多个fragment之间replace��h��问题

Sat, 22 Feb 2014 14:55:00 GMT

处理多个fragment之间replace��h��问题[转]

每次创徏fragment对象都会重新走onCreateView�Ҏ��Q�所以多个fragment互相替换会重新刷新界面，
在application中创��Z��个View�Q�保持onCreateVIew中创建的View
每次走onCreateView的时候判断application中是否保持了View�Q�如果�ؓnull�Q�重新inflater走initView和initData�Ҏ��Q�不为nul得到父类�Q�移除子View�Q�不然有父id无法再加入布局中，
以下是代码：
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
   Bundle savedInstanceState) {

  GalaxyApplication galaxyApplication = (GalaxyApplication) getActivity().getApplication();
  View recommendView = galaxyApplication.getRecommendView();
  if(recommendView != null){

   ViewGroup group = (ViewGroup) recommendView.getParent();
   group.removeAllViews();

   return recommendView;
  }

  View fmRootView = inflater.inflate(R.layout.fragment_recommend, container,false);




  initView(fmRootView);
  initData();
  galaxyApplication.setRecommendView(fmRootView);
  Logger.d("fragment: ", "onCreateView");
  return fmRootView;
}

如有好的�Ҏ��Q�处理onCreateView��h��问题 �Ƣ迎留言�?nbsp;

何云�?/a> 2014-02-22 22:55 发表评论

android讄��重复背景

Sun, 16 Feb 2014 01:59:00 GMT

创徏重复的背景图�?/p>

在drawable目录下创��Z��个repeat_bg.xml: src是引用图片的名称

1

"1.0" encoding="utf-8"?>


2
"

3
    android:src="@drawable/bg"
4
    android:tileMode="repeat" />

然后在布局的xml文�g中可以这样引�?

1

"fill_parent"


2
    android:layout_height="fill_parent"
3
    android:background="@drawable/repeat_bg">
4

何云�?/a> 2014-02-16 09:59 发表评论

CompoundButton

Fri, 20 Dec 2013 14:43:00 GMT

Android 中文 API �Q?9�Q?—— CompoundButton

前言

　　本章内容是android.widget.CompoundButton�Q�翻译来自�d�|��d�Q�再�ơ感谢�d�|��d �Q�期待你一起参与Android API 的中文翻译，联系我over140@gmail.com�?span class="Apple-converted-space">

转蝲

正文

　　一、结�?/p>

　　　　public abstract class CompoundButton extends Button implements Checkable

　　　　java.lang.Object
　　　　　　android.view.View
　　　　　　　　android.widget.TextView
　　　　　　　　　　android.widget.Button
　　　　　　　　　　　　android.widget.CompoundButton

　　二、概�q?/p>

　　　　一个带有选中/未选中状态的按钮。当按钮按下或点中时自动改变状态�?/span>

　　三、公共方�?/p>

public boolean dispatchPopulateAccessibilityEvent (AccessibilityEvent event)

在子视图的构建时分派一个辅助事件。（译者注�Q�通过源码可以看出�Q�视图构建时讄��光��中状态。）

参数

event 事�g

�q�回�?/span>

如果事�g全部完成�q�回True�?/span>

public boolean isChecked ()

�Q�译者注�Q�是否选中�Q?/span>

public void onRestoreInstanceState (Parcelable state)

允许视图重新应用以前通过onSaveInstanceState()生成代表内部的状态。这个函数决不调用一个空的状态�?/span>

参数

state �q�回以前调用onSaveInstanceState()保存下来的状态�?/span>

public Parcelable onSaveInstanceState ()

允许视图生成一个代表内部的状态，以后可用于创��Z��个与之相同的新的实例。这�U�状态应该只包含非持久或以后不能够重建的信息。例如，你决不存储你当前在屏�q�上的位�|�，因�ؓ�q�会在视囄��层面上重新计��放�|�一个新的实例�?/span>

你可以存储到�q�里的一些例子：一个文本框中当前光标的位置�Q�但通常不是文字本��n�Q�文字通常保存在内�Ҏ��供�?/span>(content provider)或其他持久的储存中）�Q�一个列表视图中的当前选中��V�?/span>

�q�回�?/span>

�q�回一个包含视囑ֽ�前状态的Parcelable对象�Q�或没有什么状态保存时�q�回null。默认实现返�?/span>null�?/span>

public boolean performClick ()

如果视图定义�?/span>OnClickListener监听器，调用此方法来执行�?/span>

�q�回�?/span>

定义了的OnClickListener被调用返�?/span>True�Q�否则返�?/span>False

public void setButtonDrawable (Drawable d)

�l�按钮背景设�|�一个可�l�制对象�Q�如�Q�图像）

参数

d 用作背景的可�l�制对象�Q�如�Q�图像）

public void setButtonDrawable (int resid)

通过资源Id�l�按钮背景设�|�一个图�?/span>

参数

resid 作�ؓ背景囑փ�的资�?/span>id

public void setChecked (boolean checked)

改变按钮的选中状�?/span>

参数

checked true选中�Q?/span>false非选中

public void setOnCheckedChangeListener (CompoundButton.OnCheckedChangeListener listener)

注册一个在按钮状态发生改变时执行的回调函�?/span>

参数

listener 当选中状态改变时调用的函�?/span>

public void toggle ()

改变选中状态�ؓ当前状态的逆状�?/span>

　　四、受保护�Ҏ��

protected void drawableStateChanged ()

在视囄��态的变化影响到所昄��可绘制的状态时调用�q�个�Ҏ��?/span>

��保在重载时中调用父�c�L��?/span>

protected int[] onCreateDrawableState (int extraSpace)

为当前视囄��成新的可�l�图区状态。这个方式当�~�存的图像绘囑֌�状态确定失效时通过视图�pȝ��调用。你可以使用getDrawableState()�Ҏ��重新取得当前的状态�?/span>

参数

extraSpace 如果为非�Ӟ��q�是你应该返回的数组在你可以存放你的状态的额外条目的数量�?/span>

�q�回�?/span>

�q�回一个记录着视图中当前绘囑֌�状态的数组

protected void onDraw (Canvas canvas)

实现你自��q��l�制�?/span>

参数

canvas 在画布上�l�制背景

protected boolean verifyDrawable (Drawable who)

如果你的视图子类昄��他自��q��可视化对象，他将要重写此�Ҏ��q�且��Z��昄��可绘制返�?/span>true。此操作允许�q�行�l�制时有动画效果�?/span>

　　��认当重写从�Ҏ��Ӟ��需调用父类相应�Ҏ��?/span>

参数

who 需判断的可�l�制对象�Q?/span>Drawable�Q�。如果是你要昄��的对象，�q�回True�Q�否则返回调用父�cȝ��l�果�?/span>

�q�回�?/span>

boolean 如果可绘制对象（Drawable�Q�已�l�在视图中显�C�，�q�回True否则�q�回false。�ƈ且此处不允许使用动画�?/span>

何云�?/a> 2013-12-20 22:43 发表评论

android library projects cannot be launched

Sat, 14 Dec 2013 15:04:00 GMT

android library projects cannot be launched

properties 在android选项中将 is library中将前面的勾��M��

何云�?/a> 2013-12-14 23:04 发表评论

Tue, 10 Dec 2013 13:00:00 GMT

BaseAdapter方式
activity_main.xml
xmlns:android1=" android:layout_width="match_parent"
android:layout_height="match_parent" >

            android1:id="@+id/listView1"
        android1:layout_width="match_parent"
        android1:layout_height="wrap_content"
        android1:layout_weight="1" >

list_item.xml

    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:gravity="center_vertical"
    android:id="@+id/waibubuju"
    >

            android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/bianhao"
        android:text="�~�号"
        android:textColor="#88ff0000"
        android:gravity="center"
         android:textSize="18sp"
        />
            android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:id="@+id/neibubuju"
        >
                android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="姓名"
       android:id="@+id/username"

            />
MainActivity.java

package com.hyl.listViewpack;

import java.util.ArrayList;

import android.R.string;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Adapter;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.ScrollView;
import android.widget.TextView;

public class MainActivity extends Activity {
protected static final String TAG = "MainActivity";
private ListView listView1;
ArrayList> arr ;

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  listView1=(ListView) findViewById(R.id.listView1);
  arr=new ArrayList>();
  for(int i=0;i<=50;i++){
   ArrayList a=new ArrayList();
   a.add("�~�号�Q?+i);
   a.add("姓名�Q?+i);
   a.add("电话�Q?+i);
   arr.add(a);


  }

  listView1.setAdapter(new BaseAdapter() {


   public View getView(int position, View convertView, ViewGroup parent) {
    //父窗�?挂蝲


    View view=View.inflate(MainActivity.this, R.layout.list_item, null);


    Log.e(TAG, "��试创徏对象位置�Q?+position);


    ArrayList a=arr.get(position);

    TextView tvbianhao=(TextView) view.findViewById(R.id.bianhao);
    tvbianhao.setText( a.get(0));

    TextView tvUserName=(TextView) view.findViewById(R.id.username);
    tvUserName.setText( a.get(1));

    TextView tvTel=(TextView) view.findViewById(R.id.tel);
    tvTel.setText( a.get(2));



    return view;
   }

   @Override
   public long getItemId(int position) {
    // TODO Auto-generated method stub
    return 0;
   }

   @Override
   public Object getItem(int position) {
    // TODO Auto-generated method stub
    return null;
   }

   @Override
   public int getCount() {

    return arr.size();
   }
  });






}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.main, menu);
  return true;
}

}

                    android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="电话"
        android:id="@+id/tel"

            />

ArrayAdapter方式
                                                                 //上下文对�?nbsp;   布局列表对象      昄��的TextView的ID   数组对象
  listView1.setAdapter(new ArrayAdapter(this, R.layout.list_item, R.id.bianhao, new String[]{"选项一","选项�?,"选项�?,"选项�?,"选项�?}));

SimpleAdapter方式

listView1=(ListView) findViewById(R.id.listView1);

  ArrayList> list=new ArrayList>();

  Map map1=new HashMap();
  map1.put("icon", R.drawable.ic1);
  map1.put("name", "功能一");
  list.add(map1);

  Map map2=new HashMap();
  map2.put("icon", R.drawable.ic2);
  map2.put("name", "功能�?);
  list.add(map2);


  Map map3=new HashMap();
  map3.put("icon", R.drawable.ic3);
  map3.put("name", "功能�?);
  list.add(map3);

  Map map4=new HashMap();
  map4.put("icon", R.drawable.ic1);
  map4.put("name", "功能�?);
  list.add(map4);

  Map map5=new HashMap();
  map4.put("icon", R.drawable.ic5);
  map4.put("name", "功能�?);
  list.add(map5);


  listView1.setAdapter(new SimpleAdapter(this, list, R.layout.list_item, new String[]{"icon","name"},new int[]{R.id.tubiao,R.id.gongneng} ));

何云�?/a> 2013-12-10 21:00 发表评论

Tue, 03 Dec 2013 06:30:00 GMT

创徏一个显�C�的界面xml
         android:id="@+id/lv_show_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="16dp" >


再创��Z��个item.xml

    android:layout_height="match_parent"
    android:orientation="vertical" >

      android:layout_width="250dip"
     android:layout_height="wrap_content"
     android:id="@+id/title"


     />
      android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:id="@+id/timelength"


     />

导入AsyncHttpClient需要的�c?br />
之后

  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_show_list_activy);
  lv_show_view = (ListView) findViewById(R.id.lv_show_view);

   AsyncHttpClient client=new AsyncHttpClient();

   String url = "     + "��试�Ҏ��";
   client.get(url, new AsyncHttpResponseHandler() {


   public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
     List list=new ArrayList();
    try {
     Toast.makeText(ShowListActivy.this,statusCode+"", 1).show();

     String json = new String(responseBody);
      JSONArray array = new JSONArray(json);
     for(int i=0 ; i < array.length() ; i++){
      JSONObject item= array.getJSONObject(i);

      String id = item.getString("id");
      String title = item.getString("title");
      String timelength = item.getString("time");
      Log.e("jsonget", id+title+timelength);
      list.add(new Video( id, title, Integer.parseInt(timelength)));
     }
     List> data = new ArrayList>();
     for (Video v : list) {
      Map it = new HashMap();
      it.put("id", v.getId());
      it.put("title", v.getTitle());
      it.put("timelength", v.getTime());
      data.add(it);
     }
     SimpleAdapter adapter = new SimpleAdapter(ShowListActivy.this, data,R.layout.item, new String[] { "title", "timelength" },new int[] { R.id.title, R.id.timelength });
     lv_show_view.setAdapter(adapter);

    } catch ( Exception e) {
      Log.e("MainActivity", e.toString());

    }


   }


   public void onFailure(int statusCode, Header[] headers,
     byte[] responseBody, Throwable error) {
    Toast.makeText(ShowListActivy.this,"shibai", 1).show();

   }
  });
  昄��Z��q�来的json�l�果�Q?br />


本文章只是自己学习笔讎ͼ�大家要慎重借鉴

何云�?/a> 2013-12-03 14:30 发表评论

Fri, 10 Aug 2012 12:52:00 GMT

AndroidManifest.xml

hyl.xml

误��入手机号�?lt;/string>
拨打此号�?lt;/string>

main.xml

android:layout_height="fill_parent">
   android:layout_height="wrap_content" android:text="@string/mobellabel"
  android:id="@+id/TextView01"

  />

android:layout_width="fill_parent" android:layout_height="wrap_content" />

何云�?/a> 2012-08-10 20:52 发表评论

亚洲国产精品成人精品小说,老司机亚洲精品影院,亚洲 欧洲 视频 伦小说

ListView实现RadioButton的功能有bug改进

listview与checkbox�l�合使用

处理多个fragment之间replace��h��问题

android讄���重复背景

CompoundButton

Android 中文 API �Q?9�Q?—— CompoundButton

android library projects cannot be launched

android library projects cannot be launched

亚洲国产精品成人精品小说,老司机亚洲精品影院,亚洲欧洲视频伦小说

android讄��重复背景