首先页面采用ViewPager，在第一个页面中有一个按钮，要求点击这个页面上的按钮弹出一个对话框。
先贴出效果图：
分析难点：1、在ViewPager中，共有四个选项卡页，找到第一个页面中Button按钮。先贴出代码：
1 package com.example.acountrecorder;
2 import java.util.ArrayList;
3 import java.util.HashMap;
4 import java.util.List;
5 import com.example.adapter.MyPagerAdapter;
6 import com.example.entity.DishesMenu;
7 import com.example.service.MenuService;
8 import android.app.Activity;
9 import android.app.AlertDialog;
10 import android.content.DialogInterface;
11 import android.os.Bundle;
12 import android.support.v4.view.ViewPager;
13 import android.support.v4.view.ViewPager.OnPageChangeListener;
14 import android.view.LayoutInflater;
15 import android.view.Menu;
16 import android.view.View;
17 import android.view.View.OnClickListener;
18 import android.view.ViewGroup;
19 import android.widget.Button;
20 import android.widget.ListView;
21 import android.widget.RadioButton;
22 import android.widget.RadioGroup;
23 import android.widget.SimpleAdapter;
24 import android.widget.RadioGroup.OnCheckedChangeListener;
25 import android.widget.Toast;
26
27 public class MainActivity extends Activity {
28
29 private Button btnMoney,adddish;
30 private RadioButton dishes,choosedishbyhand,choosedishrandom,payrecorder;
31 private RadioGroup radioGroup;
32 private ListView listView;
33 private SimpleAdapter simpleAdapter;
34 private ViewPager vpager;
35 private int currIndex=0;
36 private ArrayList<View> listViews;
37
38 @Override
39 protected void onCreate(Bundle savedInstanceState) {
40 super.onCreate(savedInstanceState);
41 setContentView(R.layout.activity_main);
42
43 init();
44 InitViewPager();
45 doSthRelative();
46 setAction();
47 }
48
49 private void setAction() {
50 if (currIndex==0) {
51 //下面两句诗关键！！！！
52 View view1 = listViews.get(currIndex);
53 adddish = (Button) view1.findViewById(R.id.adddish);
54 adddish.setOnClickListener(new OnClickListener() {
55 @Override
56 public void onClick(View v) {
57 LayoutInflater inflater = getLayoutInflater();
58 View layout = inflater.inflate(R.layout.dialog_adddish,
59 (ViewGroup) findViewById(R.id.dialog_dish));
60
61 new AlertDialog.Builder(MainActivity.this).setTitle("").setView(layout).setPositiveButton("确定",
62 new DialogInterface.OnClickListener() {
63 @Override
64 public void onClick(DialogInterface dialog, int which) {
65 // TODO Auto-generated method stub
66 Toast.makeText(MainActivity.this, "dialog弹出来的", Toast.LENGTH_SHORT).show();
67 }
68 }
69
70 ).setNegativeButton("取消", null).show();
71 }
72
73 });
74 }
75
76 }
77
78 private void init() {
79 btnMoney = (Button) findViewById(R.id.btn_money);
80 radioGroup = (RadioGroup) findViewById(R.id.radiogroup_item);
81 dishes = (RadioButton) findViewById(R.id.disheschoice);
82 choosedishbyhand = (RadioButton) findViewById(R.id.choosedishbyhand);
83 choosedishrandom = (RadioButton) findViewById(R.id.choosedishrandom);
84 payrecorder = (RadioButton) findViewById(R.id.paymentrecord);
85 //listView = (ListView) findViewById(R.id.checkdishes);
86 radioGroup.setOnCheckedChangeListener(rdgcc);
87 vpager = (ViewPager) findViewById(R.id.vPager);
88 }
89
90 private RadioGroup.OnCheckedChangeListener rdgcc = new OnCheckedChangeListener() {
91
92 @Override
93 public void onCheckedChanged(RadioGroup group, int checkedId) {
94 int r1 = dishes.getId(),r2 = choosedishbyhand.getId(),r3 = choosedishrandom.getId(),r4 = payrecorder.getId();
95 if (r1==checkedId) {
96 Toast.makeText(MainActivity.this, dishes.getText().toString(), Toast.LENGTH_SHORT).show();
97 currIndex = 0;
98 vpager.setCurrentItem(currIndex);//加载完页面后再加载页面上的元素
99 //adddish = (Button) findViewById(R.id.adddish);
100 }else if (r2==checkedId) {
101 Toast.makeText(MainActivity.this, choosedishbyhand.getText().toString(), Toast.LENGTH_SHORT).show();
102 currIndex = 1;
103 vpager.setCurrentItem(currIndex);
104 }else if (r3==checkedId) {
105 Toast.makeText(MainActivity.this, choosedishrandom.getText().toString(), Toast.LENGTH_SHORT).show();
106 currIndex = 2;
107 vpager.setCurrentItem(currIndex);
108 }else if (r4==checkedId) {
109 Toast.makeText(MainActivity.this, payrecorder.getText().toString(), Toast.LENGTH_SHORT).show();
110 currIndex = 3;
111 vpager.setCurrentItem(currIndex);
112 }
113 }
114 };
115
116 private void InitViewPager() {
117 vpager = (ViewPager) findViewById(R.id.vPager);
118 listViews = new ArrayList<View>();
119 LayoutInflater mInflater = getLayoutInflater();
120 listViews.add(mInflater.inflate(R.layout.mydishes, null));
121 listViews.add(mInflater.inflate(R.layout.chosdishhandly, null));
122 listViews.add(mInflater.inflate(R.layout.chosdishrandom, null));
123 listViews.add(mInflater.inflate(R.layout.recorders, null));
124 vpager.setAdapter(new MyPagerAdapter(listViews));
125 vpager.setCurrentItem(0);
126 vpager.setOnPageChangeListener(new OnPageChangeListener() {
127 @Override
128 public void onPageSelected(int arg0) {
129 switch (arg0) {
130 case 0:
131 dishes.setChecked(true);
132 break;
133 case 1:
134 choosedishbyhand.setChecked(true);
135 break;
136 case 2:
137 choosedishrandom.setChecked(true);
138 break;
139 case 3:
140 payrecorder.setChecked(true);
141 break;
142
143 default:
144 break;
145 }
146 }
147 @Override
148 public void onPageScrolled(int arg0, float arg1, int arg2) {
149 }
150 @Override
151 public void onPageScrollStateChanged(int arg0) {
152 }
153 });
154 }
155 private void doSthRelative(){
156 if (currIndex==0) {
157 //首先查询数据库中是否有数据，有数据则加载数据
158 listView = (ListView)findViewById(R.id.allmydishes);
159 ArrayList<HashMap<String, Object>> listMap = new ArrayList<HashMap<String, Object>>();
160 DishesMenu dish = new DishesMenu();
161 MenuService menuService = new MenuService(MainActivity.this);
162 List<DishesMenu> listMenu = menuService.queryAll();
163 if (listMenu!=null) {
164 for (int i = 0; i < listMenu.size(); i++) {
165 dish = listMenu.get(i);
166 HashMap<String, Object> map = new HashMap<String, Object>();
167 map.put("dishname", dish.getDishname());
168 map.put("dishprice", dish.getDishprice());
169 listMap.add(map);
170 }
171 simpleAdapter = new SimpleAdapter(this,listMap, R.layout.checkdisheslistviewitem, new String[]{"dishname","dishprice"}, new int[]{R.id.display_dishname,R.id.display_dishprice});
172 listView.setAdapter(simpleAdapter);
173 }
174
175 }
176
177 }
178 @Override
179 public boolean onCreateOptionsMenu(Menu menu) {
180 // Inflate the menu; this adds items to the action bar if it is present.
181 getMenuInflater().inflate(R.menu.main, menu);
182 return true;
183 }
184
185 }
其次是activitymain.xml代码：
1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 xmlns:tools="http://schemas.android.com/tools" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" 5 android:orientation="vertical" 6 android:background="#FFFFFFFF" > 7 8 <RelativeLayout 9 android:layout_width="match_parent" 10 android:layout_height="50dip" 11 android:background="#FF333333" > 12 <TextView 13 android:layout_width="wrap_content" 14 android:layout_height="wrap_content" 15 android:layout_centerInParent="true" 16 android:text="@string/title" 17 android:textColor="#FFFFFFFF" 18 android:textSize="20sp" /> 19 <Button 20 android:layout_width="40dip" 21 android:layout_height="40dip" 22 android:id="@+id/btn_money" 23 android:layout_centerInParent="true" 24 android:layout_alignParentRight="true" 25 android:layout_marginRight="20dip" 26 android:background="@drawable/moneypackage" /> 27 </RelativeLayout> 28 29 <RadioGroup 30 android:id="@+id/radiogroup_item" 31 android:layout_width="wrap_content" 32 android:layout_height="40dip" 33 android:orientation="horizontal"> 34 <RadioButton android:id="@+id/disheschoice" 35 android:layout_width="wrap_content" 36 android:layout_height="40dip" 37 android:layout_weight="1" 38 android:background="@drawable/rb_bg" 39 android:button="@null" 40 android:checked="true" 41 android:gravity="center" 42 android:text="@string/dishestochoose" 43 android:textColor="#FFFFFFFF" 44 android:textSize="18sp" 45 android:textStyle="bold" 46 /> 47 <RadioButton android:id="@+id/choosedishbyhand" 48 android:layout_width="wrap_content" 49 android:layout_height="40dip" 50 android:layout_weight="1" 51 android:background="@drawable/rb_bg" 52 android:button="@null" 53 android:checked="false" 54 android:gravity="center" 55 android:text="@string/choosedishbyhand" 56 android:textColor="#FFFFFFFF" 57 android:textSize="18sp" 58 android:textStyle="bold" 59 /> 60 <RadioButton android:id="@+id/choosedishrandom" 61 android:layout_width="wrap_content" 62 android:layout_height="40dip" 63 android:layout_weight="1" 64 android:background="@drawable/rb_bg" 65 android:button="@null" 66 android:checked="false" 67 android:gravity="center" 68 android:text="@string/choosedishrandom" 69 android:textColor="#FFFFFFFF" 70 android:textSize="18sp" 71 android:textStyle="bold" 72 /> 73 <RadioButton android:id="@+id/paymentrecord" 74 android:layout_width="wrap_content" 75 android:layout_height="40dip" 76 android:layout_weight="1" 77 android:background="@drawable/rb_bg" 78 android:button="@null" 79 android:checked="false" 80 android:gravity="center" 81 android:text="@string/paymentrecord" 82 android:textColor="#FFFFFFFF" 83 android:textSize="18sp" 84 android:textStyle="bold" 85 /> 86 </RadioGroup> 87 <android.support.v4.view.ViewPager 88 android:layout_width="wrap_content" 89 android:layout_height="wrap_content" 90 android:id="@+id/vPager" 91 android:layout_gravity="center" 92 android:background="#000000" 93 android:flipInterval="30" 94 android:persistentDrawingCache="animation" 95 /> 96 97 </LinearLayout>
第一个选项卡页面：
1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 xmlns:tools="http://schemas.android.com/tools" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" 5 android:orientation="vertical" 6 android:background="#FFFF1565" 7 android:paddingBottom="@dimen/activity_vertical_margin" 8 tools:context=".MainActivity" > 9 10 11 <ListView 12 android:layout_width="match_parent" 13 android:layout_height="340dip" 14 android:id="@+id/allmydishes" 15 android:layout_marginTop="10dip" 16 > 17 18 </ListView> 19 <Button 20 android:layout_width="50dip" 21 android:layout_height="50dip" 22 android:background="@drawable/btn_add" 23 android:gravity="bottom" 24 android:id="@+id/adddish" 25 android:layout_marginTop="20dip" 26 android:layout_marginLeft="40dip" 27 /> 28 </LinearLayout>
还有dialog.xml页面：
1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 xmlns:tools="http://schemas.android.com/tools" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" 5 android:orientation="vertical" 6 android:id="@+id/dialog_dish" 7 android:background="#00000000" > 8 9 <LinearLayout 10 android:layout_width="match_parent" 11 android:layout_height="wrap_content" 12 android:layout_marginLeft="10dip" 13 android:orientation="horizontal"> 14 <TextView 15 android:layout_width="wrap_content" 16 android:layout_height="wrap_content" 17 android:text="@string/diahname" 18 android:textColor="#FFFFFFFF" 19 android:textSize="16sp"> 20 </TextView> 21 <EditText 22 android:layout_width="200dip" 23 android:layout_height="wrap_content" 24 android:layout_marginLeft="10dip" 25 android:inputType="text" 26 android:textSize="16sp" 27 android:id="@+id/dish_addnewname"/> 28 </LinearLayout> 29 <LinearLayout 30 android:layout_width="match_parent" 31 android:layout_height="wrap_content" 32 android:layout_marginLeft="10dip" 33 android:orientation="horizontal"> 34 <TextView 35 android:layout_width="wrap_content" 36 android:layout_height="wrap_content" 37 android:text="@string/diahprice" 38 android:textColor="#FFFFFFFF" 39 android:textSize="16sp"> 40 </TextView> 41 <EditText 42 android:layout_width="200dip" 43 android:layout_height="wrap_content" 44 android:layout_marginLeft="10dip" 45 android:inputType="text" 46 android:textSize="16sp" 47 android:id="@+id/dish_addnewprice"/> 48 </LinearLayout> 49 </LinearLayout>
难点分析：2、AlertDialog的用法，详细查看AndroidAPI。
时间： 2024-08-24 19:51:22