1 package com.highxin.launcher01;
2
3
4
5 import java.util.ArrayList;
6 import java.util.HashMap;
7 import java.util.Iterator;
8 import java.util.List;
9 import java.util.Map;
10
11 import android.app.Activity;
12 import android.content.ComponentName;
13 import android.content.ContentResolver;
14 import android.content.Context;
15 import android.content.Intent;
16 import android.content.pm.ApplicationInfo;
17 import android.content.pm.PackageInfo;
18 import android.content.pm.PackageManager;
19 import android.content.pm.ResolveInfo;
20 import android.database.Cursor;
21 import android.graphics.drawable.Drawable;
22 import android.net.Uri;
23 import android.os.Bundle;
24 import android.os.Handler;
25 import android.os.Message;
26 import android.provider.ContactsContract;
27 import android.provider.ContactsContract.CommonDataKinds;
28 import android.provider.ContactsContract.PhoneLookup;
29 import android.provider.MediaStore;
30 import android.util.Log;
31 import android.view.KeyEvent;
32 import android.view.LayoutInflater;
33 import android.view.View;
34 import android.view.ViewGroup;
35 import android.view.Window;
36 import android.widget.AdapterView;
37 import android.widget.AdapterView.OnItemClickListener;
38 import android.widget.BaseAdapter;
39 import android.widget.GridView;
40 import android.widget.ImageView;
41 import android.widget.TextView;
42
43 public class MainActivity extends Activity implements Runnable,OnItemClickListener{
44 String name = "";
45 String phoneNO = "";
46 public static List<Map<String, Object>> contacts_list = new ArrayList<Map<String, Object>>();
47 public static List<Map<String, Object>> gv_applist = new ArrayList<Map<String,Object>>();
48 public static boolean switch_flag = false;
49 public static boolean click_flag = false;
50 public static boolean firstload_flag = false;//判断桌面是否是第一次加载
51 public static List<Integer> click_position = new ArrayList<Integer>();
52 private Intent serviceIntent;
53
54 public static List<ResolveInfo> appInfos;
55 public static List<ResolveInfo> showappInfos;
56 public static List<Map<String, Object>> lv_applist = new ArrayList<Map<String,Object>>();
57 public static List<Map<String, Object>> lv_addapplist = new ArrayList<Map<String,Object>>();
58 public static List<Map<String, Object>> lv_delapplist = new ArrayList<Map<String,Object>>();
59
60 static int []clickinfo;
61
62 static GridView gv_app;
63
64 String []appname ={"联系人","相机","电话","收音机","手电筒","更多"};
65 int []appicon = {R.drawable.contact,R.drawable.camera,R.drawable.dial,R.drawable.fm,R.drawable.light_off,R.drawable.shop};
66
67 private Handler mHandler = new Handler() {
68
69 @Override
70 public void handleMessage(Message msg) {
71 super.handleMessage(msg);
72
73 showappInfos = appInfos;
74
75
76 for(int i=0; i<appInfos.size();i++) {
77 if((appInfos.get(i).loadLabel(getPackageManager()).equals("相机") &&
78 appInfos.get(i).activityInfo.packageName.equals("com.android.camera")) ||
79 (appInfos.get(i).loadLabel(getPackageManager()).equals("收音机") &&
80 appInfos.get(i).activityInfo.packageName.equals("com.miui.fmradio")) ||
81 (appInfos.get(i).loadLabel(getPackageManager()).equals("老人桌面") &&
82 appInfos.get(i).activityInfo.packageName.equals("com.highxin.launcher01")) ){
83 showappInfos.remove(i);
84 }
85 }
86 clickinfo = new int[showappInfos.size()];
87 gv_app.setAdapter(new GridViewAdapter(MainActivity.this,gv_applist));
88 }
89 };
90
91
92 @Override
93 protected void onCreate(Bundle savedInstanceState) {
94 super.onCreate(savedInstanceState);
95 requestWindowFeature(Window.FEATURE_NO_TITLE);
96 setContentView(R.layout.activity_main);
97 Drawable drawable_appicon = null;
98 String s_appname = null;
99 serviceIntent = new Intent(this, LightService.class);
100 // if(!firstload_flag) {
101 for(int i=0; i<appname.length;i++) {
102 drawable_appicon = getResources().getDrawable(appicon[i]);
103 s_appname = appname[i];
104 Map<String, Object> map = new HashMap<String, Object>();
105 map.put("appname", s_appname);
106 map.put("drawable", drawable_appicon);
107
108 gv_applist.add(map);
109 }
110 // firstload_flag = true;
111 // }
112 gv_app = (GridView) findViewById(R.id.gv_apps);
113
114 gv_app.setOnItemClickListener(this);
115
116 Thread t = new Thread(this);
117 t.start();
118 }
119
120
121 private List<Map<String, Object>> fillMaps() {
122 List<Map<String, Object>> items = new ArrayList<Map<String, Object>>();
123
124 ContentResolver cr = getContentResolver();
125 HashMap<String,ArrayList<String>> hashMap = new HashMap<String,ArrayList<String>>();
126 Cursor phone = cr.query(CommonDataKinds.Phone.CONTENT_URI,
127 new String[] {
128 CommonDataKinds.Phone.CONTACT_ID,
129 CommonDataKinds.Phone.DISPLAY_NAME,
130 CommonDataKinds.Phone.NUMBER,
131 CommonDataKinds.Phone.DATA1
132 //CommonDataKinds.StructuredPostal.DATA3,
133 },
134 null, null, null);
135 while (phone.moveToNext()) {
136 String contactId = phone.getString(phone.getColumnIndex(CommonDataKinds.Phone.CONTACT_ID));
137 String displayName = phone.getString(phone.getColumnIndex(CommonDataKinds.Phone.DISPLAY_NAME));
138 String PhoneNumber = phone.getString(phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
139 String address = phone.getString(phone.getColumnIndex(CommonDataKinds.Phone.DATA1));
140
141 //以contactId为主键，把同一人的所有电话都存到一起。
142 ArrayList<String> ad = hashMap.get(contactId);
143 if(ad == null){
144 ad = new ArrayList<String>();
145 ad.add(displayName);
146 ad.add(PhoneNumber);
147 //ad.add(address);
148
149 hashMap.put(contactId, ad);
150 }
151 else{
152 ad.add(PhoneNumber);
153 }
154
155 }
156 phone.close();
157
158 ArrayList<String> tmpList;
159 String tmpStr = "";
160 int k;
161 Iterator iter = hashMap.entrySet().iterator();
162 while (iter.hasNext()) {
163 HashMap.Entry entry = (HashMap.Entry) iter.next();
164 Object key = entry.getKey();
165 Object val = entry.getValue();
166
167 tmpList = (ArrayList) val;
168 tmpStr = tmpList.get(1);
169 //注释掉的为读取多个联系人的方法
170 // for(k = 1; k < tmpList.size(); k++){
171 // tmpStr = tmpStr + tmpList.get(k) + ‘,‘ ;
172 // }
173
174 HashMap<String, Object> tmpMap = new HashMap<String, Object>();
175 tmpMap.put("name", tmpList.get(0));
176 tmpMap.put("phoneNO", tmpStr);
177 tmpMap.put("img", R.drawable.image);
178
179 items.add(tmpMap);
180 }
181 return items;
182 }
183
184
185 class GridViewAdapter extends BaseAdapter{
186
187 LayoutInflater inflater;
188 List<Map<String, Object>> gvlist;
189 public GridViewAdapter(Context context,List<Map<String, Object>> locallist) {
190 inflater = LayoutInflater.from(context);
191 gvlist = locallist;
192 }
193 @Override
194 public int getCount() {
195 // TODO Auto-generated method stub
196 return gvlist.size();
197 }
198
199 @Override
200 public Object getItem(int position) {
201 // TODO Auto-generated method stub
202 return gvlist.get(position);
203 }
204
205 @Override
206 public long getItemId(int position) {
207 // TODO Auto-generated method stub
208 return position;
209 }
210
211 @Override
212 public View getView(int position, View convertView, ViewGroup parent) {
213 // TODO Auto-generated method stub
214
215 View view = inflater.inflate(R.layout.gv_item, null);
216 TextView name = (TextView)view.findViewById(R.id.gv_item_appname);
217 ImageView iv = (ImageView)view.findViewById(R.id.gv_item_icon);
218 name.setText((CharSequence) gvlist.get(position).get("appname"));
219 iv.setImageDrawable((Drawable) gvlist.get(position).get("drawable"));
220
221 return view;
222 }
223
224 }
225
226
227 @Override
228 protected void onResume() {
229 super.onResume();
230 gv_app.setAdapter(new GridViewAdapter(MainActivity.this,gv_applist));
231 }
232
233 @Override
234 public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
235 // TODO Auto-generated method stub
236 switch(arg2) {
237
238 case 0:{
239 contacts_list = fillMaps();
240 Intent contact = new Intent(MainActivity.this, Contacts.class);
241 startActivity(contact);
242 }break;
243 case 1:{
244 Intent imageCaptureIntent = new Intent("android.media.action.STILL_IMAGE_CAMERA");
245 startActivityForResult(imageCaptureIntent,1);
246 }break;
247 case 2:{
248 Intent i = new Intent();
249 String packageName = "com.android.contacts";
250 String mainActivityName = "com.android.contacts.activities.TwelveKeyDialer";
251 i.setComponent(new ComponentName(packageName,mainActivityName));
252 startActivity(i);
253 }break;
254 case 3:{
255 Intent intent = new Intent();
256 intent.setPackage("com.miui.fmradio");
257 startActivityForResult(intent, 3);
258 }break;
259 case 4:{
260 switch_flag = !switch_flag;
261 if(switch_flag) {
262 startService(serviceIntent);
263 ImageView iv = (ImageView) arg1.findViewById(R.id.gv_item_icon);
264 iv.setImageResource(R.drawable.light);
265
266 }else {
267 stopService(serviceIntent);
268 ImageView iv = (ImageView) arg1.findViewById(R.id.gv_item_icon);
269 iv.setImageResource(R.drawable.light_off);
270 }
271 }break;
272 case 5:{
273 Intent applist = new Intent(MainActivity.this, AppList.class);
274 startActivityForResult(applist,5);
275 }break;
276 default:{
277 Intent i = new Intent();
278 String packageName = (String) MainActivity.gv_applist.get(arg2).get("pkgname");
279 String mainActivityName = (String) MainActivity.gv_applist.get(arg2).get("activityname");
280 i.setComponent(new ComponentName(packageName,mainActivityName));
281 startActivity(i);
282
283
284 }break;
285 }
286 }
287
288 @Override
289 public void run() {
290
291 appInfos = getResolveInfoLists();
292 mHandler.sendEmptyMessage(0);
293 }
294
295
296 /**
297 * @Title: getResolveInfoLists
298 * @Description: 它是通过解析< Intent-filter>标签得到有 < action
299 * android:name=”android.intent.action.MAIN”/> < action
300 * android:name=”android.intent.category.LAUNCHER”/>
301 * @param ：
302 * @return List<ResolveInfo>
303 * @throws
304 */
305 private List<ResolveInfo> getResolveInfoLists() {
306
307 // TODO Auto-generated method stub
308 PackageManager packageManager = this.getPackageManager();
309
310 Intent intent = new Intent(Intent.ACTION_MAIN);
311 intent.addCategory(Intent.CATEGORY_LAUNCHER);
312
313 return packageManager.queryIntentActivities(intent, 0);
314 }
315
316 @Override
317 protected void onDestroy() {
318 // TODO Auto-generated method stub
319 super.onDestroy();
320 // gv_applist.clear();
321 }
322
323 // @Override
324 // public boolean onKeyDown(int keyCode, KeyEvent event) {
325 // if (keyCode == KeyEvent.KEYCODE_BACK){
326 // return true;
327 // }
328 // if(keyCode == KeyEvent.KEYCODE_HOME) {
329 // gv_applist.clear();
330 // }
331 //
332 // return super.onKeyDown(keyCode, event);
333 //
334 // }
335 }
每次按返回键，重新进入程序gv_applist.add(map)，会在原来的基础上不断增加。
找到一篇文章是描述的大概也是这个问题：
突然想到了一个问题，因为我在这两个Activity中使用了不一样的结束方式，一个为System.exit(0);一种为finishi();感觉可能是这两个方式造成的，后来经过测试，确实是这两个方式造成的，如果是使用System.exit（0）；的方式的话，等于把这个Acitvity结束了，因此他所操作过的数据都不会再存在了，系统也许认为没有存在的必要了吧，使用finishi();的话，虽然也是退出，但是这个并不是释放资源，只是把当前的Activity推向后台，不再显示，但是他不释放资源，具体资源什么时候释放，由系统决定，当然System.exit（0）；这种形式，也并不是真正的退出系统，因为我们还可能有别的Activity在运行，但是他确实把资源释放了！这个是为什么，不太明白！
的确重写onDestroy(),调用finish方法还是有这个问题，但是调用System.exit(0)就不存在这个问题啦。如果仅仅就是解决这个问题，当然可以继续坚持使用static变量，要么在destroy方法中对gv_applist清零,要么设置变量判断是不是第一次启动。
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
// System.exit(0);
finish();
// gv_applist.clear();
}
但当把这个程序变成桌面程序时,又有一个问题出现啦
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<category android:name="android.intent.category.HOME" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
MainActivity中还有一个变量：static int []clickinfo;这个变量只在点击应用程序后面的按钮时值才会发生改变，为+号时，点击会将图标添加到主屏幕，添加完成之后立即变成-号
gv_applist决定主屏幕上加载哪些图标，但当添加完一个图标之后，立即按home键，（桌面程序被推入后台，但是不释放资源，重启桌面程序）会发现主屏幕仍然存在这个图标，但是原来应用列表里面的-号却变成了加号。
if (MainActivity.clickinfo[position] == 0) {
ibt_operate.setImageDrawable(getResources().getDrawable(
R.drawable.add));
} else {
ibt_operate.setImageDrawable(getResources().getDrawable(
R.drawable.del));
}
但应用列表里的图标仅仅依据clickinfo变量加载，所以可以断定clickinfo被初始化成全零啦。
static int []clickinfo;
public static List<Map<String, Object>> lv_applist = new ArrayList<Map<String,Object>>();
原来定义时，clickinfo没有使用new方法，这种变量进入后台后值是不能够保存的。
如果使用全局变量：
1、尽量减少对代码的同步计算
例如：
for(int i =0;i<list.size;i++){
}
|
应替换为：
for(int i = 0, int len= list.size();i<len;i++){
}
|
2、尽量采用lazy loading的策略，在需要的时候才开始创建
例如：
String str = "aaa";
if(i==1){
list.add(str)
}
|
应替换为：
if(i ==1){
String str = "aaa"
list.add(str)
}
|
时间： 2024-11-10 04:13:30