Dialog和ListView，progressBar的结合使用

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今天看了体格Demos，使用Dialog和ListView结合使用。这个例子让我掌握了自定义Dialog的使用和自定义Adapter的使用。下面是实现的步骤以及代码实现。

DialogListView。
1、自定义dialog（PickDialog类）：设置context，title。将xml中的布局文件加入到该类中
1.1 PickDialog继承自Dialog，写构造方法初始化context、title、pickDialogListener。
1.2 重写onCreate方法，将布局文件加入到java文件中
1.3 定义public void initListViewData(ArrayList<String> list)方法，设置布局可见，并将适配器加入到布局文件中。
2、定义pickDialogListener接口，创建一下方法：
public void onLeftBtnClick();
public void onRightBtnClick();
public void onListItemClick(int position, String string);
public void onListItemLongClick(int position, String string);
public void onCancel();
2、自定义ListView适配器(DialogListViewAdapter类)：继承自BaseAdapter。覆写其中的方法。
public DialogListViewAdapter(Context context, List<String> list){
this.context=context;
this.list=list;
}

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

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

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

@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
Holder holder =null;
if(convertView==null){
convertView=LayoutInflater.from(context).inflate(R.layout.blend_dialog_list_item, null);
holder=new Holder();
holder.blend_dialog_list_item_textview=(TextView) convertView.findViewById(R.id.blend_dialog_list_item_textview);

convertView.setTag(holder);
}else{
holder=(Holder) convertView.getTag();
}
holder.blend_dialog_list_item_textview.setText(list.get(position));

return convertView;
}
class Holder{
TextView blend_dialog_list_item_textview;
}
3、在MainActivity中将内容显示出来，new Handler().postDelayed()方法延迟加载listView布局

activity_main.xml

<RelativeLayout 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">    <Button        android:id="@+id/start"        android:layout_centerHorizontal="true"        android:layout_centerVertical="true"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="开始"/></RelativeLayout>

pickdialog.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent" android:layout_height="match_parent">    <TextView        android:id="@+id/dialog_title"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <LinearLayout        android:id="@+id/progress_layout"        android:orientation="vertical"        android:layout_width="fill_parent"        android:layout_height="wrap_content">    <ProgressBar        android:layout_width="match_parent"        android:layout_height="374dp"        android:indeterminate="false"       />    </LinearLayout>    <LinearLayout        android:orientation="vertical"        android:layout_width="fill_parent"        android:layout_height="wrap_content">    <ListView        android:id="@+id/listview_list"        android:layout_width="fill_parent"        android:layout_height="wrap_content">    </ListView>        </LinearLayout></LinearLayout>

listview_item.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent" android:layout_height="match_parent">    <TextView        android:id="@+id/textview"        android:textColor="#000000"        android:layout_width="wrap_content"        android:layout_height="20dp" /></LinearLayout>

MainActivity.java

package lzl.edu.com.dialogtest;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.view.View;import android.widget.Button;import android.widget.Toast;import java.util.ArrayList;import java.util.List;public class MainActivity extends Activity {    Button start;    PickDialog pickDialog;    List<String> list = new ArrayList<String>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        start = (Button)findViewById(R.id.start);        for(int i=0;i<100;i++){            list.add("第"+i+"条数据");        }        start.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                pickDialog =new PickDialog(MainActivity.this,"明天的太阳", new PickDialogListener() {                    @Override                    public void onLeftBtnClick() {                    }                    @Override                    public void onRightBtnClick() {                    }                    @Override                    public void onListItemClick(int position, String string) {                        Toast.makeText(MainActivity.this,string,Toast.LENGTH_LONG).show();                    }                    @Override                    public void onListItemLongClick(int position, String string) {                    }                    @Override                    public void onCancel() {                    }                });                pickDialog.show();                //for test 延迟三秒加载                new Handler().postDelayed(new Runnable() {                    public void run() {                        //execute the task                        pickDialog.initListViewData(list);                    }                }, 3000);            }        });    }}

PickDialog.java

package lzl.edu.com.dialogtest;import android.app.Dialog;import android.content.Context;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.widget.AdapterView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.TextView;import java.util.ArrayList;import java.util.List;/** * Created by admin on 2015/8/18. */public class PickDialog extends Dialog {     Context context;     String title;    TextView dialog_title;     LinearLayout progress_layout;     ListView listview_list;     PickDialogListener pickDialogListener;    DialogListView dialogListView;    List<String> items = new ArrayList<String>();   public PickDialog(Context context,String title,PickDialogListener pickDialogListener){       super(context);       this.context = context;       this.title = title;       this.pickDialogListener = pickDialogListener;   }    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        //将xml文件中的布局加入到 java文件中        LayoutInflater inflater = LayoutInflater.from(context);        LinearLayout layout = (LinearLayout)inflater.inflate(R.layout.pickdialog, null);        dialog_title = (TextView)layout.findViewById(R.id.dialog_title);        progress_layout = (LinearLayout)layout.findViewById(R.id.progress_layout);        listview_list = (ListView)layout.findViewById(R.id.listview_list);        //将布局设置到view中。        this.setContentView(layout);    }    public void initListViewData(List<String> list){        items = list;        //将进度条设置不可见        progress_layout.setVisibility(View.GONE);        dialog_title.setText(title);        listview_list.setVisibility(View.VISIBLE);        dialogListView = new DialogListView(context,list);        listview_list.setAdapter(dialogListView);        //设置每个元素的 点击事件        listview_list.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                if(pickDialogListener!=null)                    pickDialogListener.onListItemClick(position,items.get(position));            }        });    }}

DialogListView.java

package lzl.edu.com.dialogtest;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;import java.util.ArrayList;import java.util.List;/** * Created by admin on 2015/8/18. */public class DialogListView extends BaseAdapter {    private Context context;    private List<String> list = new ArrayList<String>();    public DialogListView(Context context,List<String> list){        this.context = context;        this.list = list;    }    @Override    public int getCount() {        return list.size();    }    @Override    public Object getItem(int position) {        return position;    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        //将list_item.xml中的布局加载到listview中        Holder holder = null;        if(convertView == null){            holder = new Holder();            convertView = LayoutInflater.from(context).inflate(R.layout.listview_item,null);            holder.textview = (TextView)convertView.findViewById(R.id.textview);            convertView.setTag(holder);        }else{            holder = (Holder)convertView.getTag();        }        //设置文本内容        holder.textview.setText(list.get(position));        return convertView;    }    class Holder{        TextView textview;    }}

PickDialogListener.java

package lzl.edu.com.dialogtest;/** * Created by admin on 2015/8/18. */public interface PickDialogListener {    public void onLeftBtnClick();    public void onRightBtnClick();    public void onListItemClick(int position, String string);    public void onListItemLongClick(int position, String string);    public void onCancel();}

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