Android Intent隐式意图显示菜单

1package com.example.mytest;
2import android.os.Bundle;
3import android.app.Activity;
4import android.view.Menu;
5public class MainActivity extends Activity {
6 @Override
7 protected void onCreate(Bundle savedInstanceState) {
8  super.onCreate(savedInstanceState);
9  setContentView(R.layout.activity_main);
10 }
11
12}
13
14package com.example.mytest;
15import android.app.ActivityGroup;
16import android.app.AlertDialog;
17import android.app.Dialog;
18import android.content.DialogInterface;
19import android.content.Intent;
20import android.graphics.Color;
21import android.graphics.drawable.ColorDrawable;
22import android.os.Bundle;
23import android.view.Gravity;
24import android.view.KeyEvent;
25import android.view.View;
26import android.view.Window;
27import android.view.ViewGroup.LayoutParams;
28import android.widget.AdapterView;
29import android.widget.GridView;
30import android.widget.LinearLayout;
31import android.widget.AdapterView.OnItemClickListener;
32 
33public class MyActivityGroupImageDemo1 extends ActivityGroup{
34 private GridView gridviewToolbar;         // 定义GridView工具条
35 private MenuImageAdapter menu = null;        // 图片适配器
36 private Intent intent=null;// 要操作的Intent
37 private LinearLayout content = null;        // 显示内容的布局管理器
38 private int menu_img[] = new int[] { R.drawable.menu_phone,
39   R.drawable.common_account, R.drawable.common_download, R.drawable.menu_news,
40   R.drawable.common_exit };         // 图片显示资源ID
41 private int width = 0 ;           // 保存每个菜单项的图片宽度
42 private int height = 0 ;
43 @Override
44 protected void onCreate(Bundle savedInstanceState) {
45  // TODO Auto-generated method stub
46  super.onCreate(savedInstanceState);
47  super.requestWindowFeature(Window.FEATURE_NO_TITLE);
48  super.setContentView(R.layout.mylist);
49  this.gridviewToolbar=(GridView)super.findViewById(R.id.gridviewbar);
50  this.content=(LinearLayout)super.findViewById(R.id.content);
51  this.gridviewToolbar.setNumColumns(this.menu_img.length);
52  this.gridviewToolbar.setBackgroundColor(Color.GRAY);
53  this.gridviewToolbar.setSelector(new ColorDrawable(Color.TRANSPARENT));
54  this.gridviewToolbar.setGravity(Gravity.CENTER);
55  this.gridviewToolbar.setVerticalSpacing(0);
56  this.width = super.getWindowManager().getDefaultDisplay().getWidth()
57    / this.menu_img.length;        // 计算平均宽度
58  this.height = super.getWindowManager().getDefaultDisplay().getHeight() 
59    / 8;            // 高度
60  this.menu = new MenuImageAdapter(this, this.menu_img, this.width,
61    this.height, R.drawable.menu_selected);    // 实例化适配器
62  this.gridviewToolbar.setAdapter(this.menu);     // 设置显示数据
63  this.switchActivity(0);          // 默认打开第一个
64  this.gridviewToolbar.setOnItemClickListener(
65    new OnItemClickListenerImpl());      // 选中监听
66 }
67 private class OnItemClickListenerImpl implements OnItemClickListener {
68  @Override
69  public void onItemClick(AdapterView<?> parent, View view, int position,
70    long id) {
71   MyActivityGroupImageDemo1.this.switchActivity(position); // 切换选项
72  }
73 }
74 
75 /**
76  * 根据ID打开指定的Activity
77  * @param id GridView选中项的序号
78  */
79 private void switchActivity(int id) {       // 切换视图
80  this.menu.setFocus(id);          // 选中项获得高亮
81  this.content.removeAllViews();        // 先清除容器中所有View
82  switch (id) {            // 根据操作实例化Intent
83  case 0:              // 指定操作的Intent
84   this.intent = new Intent(MyActivityGroupImageDemo1.this,
85     MainActivity.class);
86   break;
87  case 1:              // 指定操作的Intent
88   this.intent = new Intent(MyActivityGroupImageDemo1.this,
89     MainActivity.class);
90   break;
91  case 2:              // 指定操作的Intent
92   this.intent = new Intent(MyActivityGroupImageDemo1.this,
93     MainActivity.class);
94   break;
95  case 3:              // 指定操作的Intent
96   this.intent = new Intent(MyActivityGroupImageDemo1.this,
97     MainActivity.class);
98   break;
99  case 4:              // 指定操作的Intent
100   this.exitDialog();          // 退出判断
101   return;
102  }
103  this.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);  // 增加标记 
104  Window subActivity = this.getLocalActivityManager().startActivity(
105    "subActivity", this.intent);      // Activity 转为 View
106  this.content.addView(subActivity.getDecorView(),
107    LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT); // 容器添加View
108 }
109 private void exitDialog() {
110  Dialog dialog = new AlertDialog.Builder(
111    MyActivityGroupImageDemo1.this)      // 实例化对象
112    .setIcon(R.drawable.pic_m)        // 设置显示图片
113    .setTitle("程序退出？")         // 设置显示标题
114    .setMessage("您确定要退出本程序吗？")      // 设置显示内容
115    .setPositiveButton("确定",        // 增加一个确定按钮
116      new DialogInterface.OnClickListener() {  // 设置操作监听
117       public void onClick(DialogInterface dialog,
118         int whichButton) {     // 单击事件
119        MyActivityGroupImageDemo1.this.finish();// 程序结束
120       }
121      }).setNegativeButton("取消",     // 增加取消按钮
122      new DialogInterface.OnClickListener() {  // 设置操作监听
123       public void onClick(DialogInterface dialog,
124         int whichButton) {     // 单击事件
125        MyActivityGroupImageDemo1.this
126          .switchActivity(0);
127       }
128      }).create();         // 创建Dialog
129  dialog.show();             // 显示对话框
130 }
131 @Override
132 public boolean onKeyDown(int keyCode, KeyEvent event) {
133  if (keyCode == KeyEvent.KEYCODE_BACK) {      // 如果是手机上的返回键
134   this.exitDialog();           // 提示退出对话框
135  }
136  return false;
137 }
138}
139
140package com.example.mytest;
141import android.content.Context;
142import android.view.View;
143import android.view.ViewGroup;
144import android.widget.BaseAdapter;
145import android.widget.GridView;
146import android.widget.ImageView;
147public class MenuImageAdapter extends BaseAdapter{
148 private Context context;
149 private ImageView[] menuImg;
150 private int selectedMenuImg;
151 public MenuImageAdapter(Context context,int imgIds[],int width,int height,int selectedMenuImg) {
152  // TODO Auto-generated constructor stub
153  this.context=context;
154  this.selectedMenuImg=selectedMenuImg;
155  this.menuImg=new ImageView[imgIds.length];
156  for (int x = 0; x < imgIds.length; x++) {
157   this.menuImg[x]=new ImageView(this.context);
158   this.menuImg[x].setLayoutParams(new GridView.LayoutParams(width,height));
159   this.menuImg[x].setAdjustViewBounds(false);
160   this.menuImg[x].setPadding(3, 3, 3, 3);
161   this.menuImg[x].setImageResource(imgIds[x]);
162  }
163 }
164 
165 @Override
166 public int getCount() {
167  // TODO Auto-generated method stub
168  return this.menuImg.length;
169 }
170 @Override
171 public Object getItem(int position) {
172  // TODO Auto-generated method stub
173  return this.menuImg[position];
174 }
175 @Override
176 public long getItemId(int position) {
177  // TODO Auto-generated method stub
178  return 0;
179 }
180 @Override
181 public View getView(int position, View convertView, ViewGroup parent) {
182  // TODO Auto-generated method stub
183  ImageView imageView=null;
184  if (convertView==null) {
185   imageView=this.menuImg[position];
186  }else{
187   imageView=(ImageView)convertView;
188  }
189  return imageView;
190 }
191 
192 public void setFocus(int selId) {
193  // 遍历菜单图片数组
194  for (int x = 0; x < this.menuImg.length; x++) {
195   if (x!=selId) {
196    this.menuImg[x].setBackgroundResource(0);
197   }
198  }
199  //选中的菜单图片高亮显示
200  this.menuImg[selId].setBackgroundResource(this.selectedMenuImg);
201 }
202}
203
204<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
205    xmlns:tools="http://schemas.android.com/tools"
206 android:orientation="vertical" 
207 android:layout_width="fill_parent"
208 android:layout_height="fill_parent"
209 android:background="@color/gold">
210    <TextView
211        android:id="@+id/textView1"
212        android:layout_width="wrap_content"
213        android:layout_height="wrap_content"
214        android:layout_alignParentLeft="true"
215        android:layout_centerVertical="true"
216        android:background="@android:color/transparent"
217        android:text="@string/pledge"
218        android:textSize="25dp" />
219</RelativeLayout>
220
221<?xml version="1.0" encoding="utf-8"?>
222<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
223    android:layout_width="match_parent"
224    android:layout_height="match_parent"
225    android:orientation="vertical" 
226    android:background="@color/gold">
227    <RelativeLayout
228        android:layout_width="match_parent"
229        android:layout_height="match_parent" >
230    <LinearLayout 
231        android:id="@+id/content"
232  android:layout_width="fill_parent" 
233  android:layout_height="wrap_content"
234  android:orientation="horizontal">
235   
236    </LinearLayout>
237    <GridView
238   android:layout_height="wrap_content" 
239   android:id="@+id/gridviewbar"
240   android:layout_alignParentBottom="true" 
241   android:layout_width="fill_parent"
242   android:fadingEdgeLength="5px" 
243   android:fadingEdge="vertical">
244    </GridView>
245</RelativeLayout>
246</LinearLayout>
247
248<?xml version="1.0" encoding="utf-8"?>
249<manifest xmlns:android="http://schemas.android.com/apk/res/android"
250    package="com.example.mytest"
251    android:versionCode="1"
252    android:versionName="1.0" >
253    <uses-sdk
254        android:minSdkVersion="8"
255        android:targetSdkVersion="18" />
256    <application
257        android:allowBackup="true"
258        android:icon="@drawable/icon"
259        android:label="@string/app_name"
260        android:theme="@style/AppTheme" >
261        <activity
262            android:name=".MyActivityGroupImageDemo1"
263            android:label="@string/app_name" >
264            <intent-filter>
265                <action android:name="android.intent.action.MAIN" />
266                <category android:name="android.intent.category.LAUNCHER" />
267            </intent-filter>
268        </activity>
269        <activity 
270            android:name=".MainActivity"
271            android:label="@string/app_name">
272        </activity>
273    </application>
274</manifest>