Dialog和ListView，progressBar的結合使用
今天看了體格Demos，使用Dialog和ListView結合使用。
這個樣例讓我掌握了自己定義Dialog的使用和自己定義Adapter的使用。
以下是實現的步驟以及代碼實現。
DialogListView。
1、自己定義dialog（PickDialog類）：設置context，title。
將xml中的布局文件增加到該類中
1.1 PickDialog繼承自Dialog。寫構造方法初始化context、title、pickDialogListener。
1.2 重寫onCreate方法，將布局文件增加到java文件裏
1.3 定義public void initListViewData(ArrayList<String> list)方法。設置布局可見。並將適配器增加到布局文件裏。
2、定義pickDialogListener接口。創建一下方法：
public void onRightBtnClick();
public void onListItemClick(int position, String string);
public void onListItemLongClick(int position, String string);
public void onCancel();
2、自己定義ListView適配器(DialogListViewAdapter類)：繼承自BaseAdapter。覆寫當中的方法。
public DialogListViewAdapter(Context context, List<String> list){
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
}
@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中將內容顯示出來，new Handler().postDelayed()方法延遲載入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="開始"/>
</RelativeLayout>pickdialog.xml
<?listview_item.xmlxml 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>
<?xml version="1.0" encoding="utf-8"?MainActivity.java> <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>
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+"條數據");
}
start.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
pickDialog =new PickDialog(MainActivity.this,"明天的太陽", 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 延遲三秒載入
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);
//將xml文件裏的布局增加到 java文件裏
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);
//將布局設置到view中。
this.setContentView(layout);
}
public void initListViewData(List<String> list){
items = list;
//將進度條設置不可見
progress_layout.setVisibility(View.GONE);
dialog_title.setText(title);
listview_list.setVisibility(View.VISIBLE);
dialogListView = new DialogListView(context,list);
listview_list.setAdapter(dialogListView);
//設置每一個元素的 點擊事件
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) {
//將list_item.xml中的布局載入到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();
}
//設置文本內容
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();
}
Dialog和ListView，progressBar的結合使用