Android桌面Widget

写这篇博客主要是为了纪念一下我转做App之后的第一个应用，当时确实很多都不懂，一点一点开始研究，虽然写的很一般，但是当时真的很用心在做，连续做了2周，每天加班都在10点以后，全公司最后走的就是我，现在想想真的不错。
这个应用的需求改了又改，改了又改，经过无数次的需求修改，终于确定下来了，首先桌面要有一个widget负责定时显示图片内容，图片地址给出来的很多张图片，每张图片的显示时间也不同，对应每个图片还有不同的消息内容，如果是应用那么就去打开应用，如果是网页就去打开网页，数据为每12小时获取一次，图片要在wifi的情况下获得，原本还有获得手机的各种状态，包括地理位置，mac地址，蓝牙地址，如果有卡的话要获得基站信息，ip地址等发给后台，而且时间很短，10分钟发一次，由于这样做太费电，所以后面的需求被拿掉了。
需求就这么多，说说实现吧，widget在开机时接收到开机广播，去拿图片，并使用handler做12小时延迟操作，拿到数据后，放到一个list里面，然后通过list里面的对象获得图片地址，然后去下载每张图片，保存在本地，如果下次拿到数据后图片已经有了就不再去下载。
有的同学会说还有什么下载现在网上N多的显示网络图片的框架，improt进来直接用多方便，对不起我到现在还不知道widget中imageview怎么来设置网络图片，至少我找到的还不支持这种设置，如果有同学做过，请千万告诉我，省得写download图片的代码，好了话不多说开始上代码。
如果你想在桌面上生成一个widget,那么在AndroidManifest里面需要定义一个receiver,并且包含meta-data为

        <receiver android:name=".LogoAppWidgetProvider"><intent-filter><action android:name="android.net.conn.CONNECTIVITY_CHANGE" /><action android:name="android.net.wifi.WIFI_STATE_CHANGED" /><action android:name="android.net.wifi.STATE_CHANGE" /></intent-filter><meta-data
                android:name="android.appwidget.provider"android:resource="@xml/adv_widget_provider" /></receiver>

这里面resource = @xml/adv_widget_provider就是用来获得布局的

<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"android:initialLayout="@layout/adv_service_layout"android:minHeight="30dp"android:minWidth="250dp"android:previewImage="@drawable/ic_launcher" >
</appwidget-provider>

简单说说第一行布局文件，用来绘制你的widget的形体，后面的就是宽高，最下面的是你这个widget在launcher里面注册的图标样式，其中我要吐槽一下，金立做的launcher实在是让人发指，定制的launcher的大小完全和其他手机不同，我在其他手机上面写一行的数据，到了他这就是2行，而且左右两边无法对齐，好了这不是重点。
@layout/adv_service_layout

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:background="@android:color/transparent"android:gravity="center"android:orientation="vertical"><ImageView
        android:id="@+id/adv_imageview"android:layout_width="match_parent"android:layout_height="match_parent"android:scaleType="fitXY" />
</LinearLayout>

这个没什么了，就一个imageview
后面就是Java代码了，首先是Application

public class LogoApplication extends Application {public static List<LogoInfo> logoinfolist = new ArrayList<LogoInfo>();public static List<LogoInfo> tempLogoInfoList = new ArrayList<LogoInfo>();public static int logoinfolistLength;public static int logoeverytime;public static RequestQueue queues;public static String picPath = "/sdcard/LogoWidget/";public static List<String> picNameList = new ArrayList<String>();public void onCreate() {super.onCreate();queues = Volley.newRequestQueue(getApplicationContext());mHandler.sendEmptyMessage(0);startService(new Intent(LogoApplication.this, DownloadPicFromClient.class));}Handler mHandler = new Handler() {public void handleMessage(Message msg) {super.handleMessage(msg);try {startService(new Intent(LogoApplication.this, LogoService.class));} catch (Exception e) {mHandler.sendEmptyMessageDelayed(0, 12 * 60 * 60 * 1000);}mHandler.sendEmptyMessageDelayed(0, 12 * 60 * 60 * 1000);}};public static RequestQueue getHttpQueues() {return queues;}
}

代码没什么难度，这里用初始化Volley，然后生命一个Handler每12小时拿一次数据，
后面还要写一个

public class LogoAppWidgetProvider extends AppWidgetProvider {private static final String TAG = "LogoAppWidgetProvider";public static final String ACTION_APPWIDGET_UPDATE = "android.appwidget.action.APPWIDGET_UPDATE";// android:debuggable="false"@Overridepublic void onReceive(Context context, Intent intent) {// TODO Auto-generated method stubIntent stateintent = new Intent(context, LogoService.class);context.startService(stateintent);}public void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {}@Overridepublic void onDeleted(Context context, int[] appWidgetIds) {}@Overridepublic void onEnabled(Context context) {}@Overridepublic void onDisabled(Context context) {//context.stopService(new Intent(context, LogoService.class));}
}

这个是保证Application启动之后wifi没有打开，一旦wifi打开程序会在重新去拿数据
DownloadPicFromClient.java

public class GetDataFromClient implements HttpResponseListener {private final static String loadJson = "https://cloud.yuyutechnology.com/adserver/adversFetch.do?deviceId=123&init=true&advertuserId=7";//pro// private final static String loadJson = "https://cloud888.yuyutechnology.com/adserver/adversFetch.do?deviceId=123&init=true&advertuserId=7";//testprivate final static String TAG_CHECK = "tag_check";public static GetDataFromClient getInstace() {return new GetDataFromClient();}public static void getdataFromClient(Context context) {if (CheckWifiConnect.isNetworkConnected(context)) {if (CheckWifiConnect.isWifiConnected(context)) {if (!CheckWifiConnect.isMobileConnected(context)) {VolleyRequest volleyRequest = new VolleyRequest();volleyRequest.setHttpResponseListener(getInstace());volleyRequest.RequestPost(loadJson, TAG_CHECK);}}}}@Overridepublic void httpResponse(String data) {LG.e(GetDataFromClient.class, data);dataToObject(data);}public void dataToObject(String data) {if (data == null)return;try {JSONArray valarray = new JSONArray(data);LogoApplication.logoinfolistLength = valarray.length();LogoApplication.logoeverytime = Integer.parseInt(valarray.getJSONObject(0).getString("adImageShowInterval"));LogoApplication.tempLogoInfoList.clear();for (int i = 0; i < valarray.length(); i++) {JSONObject arr = valarray.getJSONObject(i);LogoInfo advinfo = new LogoInfo();advinfo.adAppActionPackageName = arr.optString("adAppActionPackageName");advinfo.adAppActionClassName = arr.optString("adAppActionClassName");advinfo.adBrowserAction = arr.optString("adBrowserAction");advinfo.adImageUrl = arr.optString("adImageUrl");LogoApplication.tempLogoInfoList.add(advinfo);}EventBus.getDefault().post(LogoApplication.tempLogoInfoList);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}@Overridepublic void httpREsponseError(VolleyError error) {}
}

获得数据放入到一个静态的list里面后续下载图片以及播放图片都要用到，这里面拿到图片之后就使用EventBus发送通知去下载图片
DownloadPicFromClient.java

public class DownloadPicFromClient extends Service {Context context;public static int i = 0;@Overridepublic IBinder onBind(Intent intent) {return null;}@Overridepublic void onCreate() {super.onCreate();context = getApplicationContext();}@Overridepublic void onStart(Intent intent, int startId) {super.onStart(intent, startId);if (!EventBus.getDefault().isRegistered(this))EventBus.getDefault().register(this);}public void onEventMainThread(List<LogoInfo> logoinfolist) {if (CheckWifiConnect.isNetworkConnected(context)) {if (CheckWifiConnect.isWifiConnected(context)) {for (int i = 0; i < logoinfolist.size(); i++) {File file = new File(logoinfolist.get(i).adImageUrl.trim());String fileName = file.getName();File sdFile = new File(LogoApplication.picPath + fileName);boolean iAllPic = true;if (!sdFile.exists()) {iAllPic = false;MyAsynaTask mTask = new MyAsynaTask(logoinfolist.get(i));mTask.execute(logoinfolist.get(i).adImageUrl);} else {logoinfolist.get(i).downPicName = fileName;}if (iAllPic)EventBus.getDefault().post("play advertisement");}}}}@Overridepublic int onStartCommand(Intent intent, int flags, int startId) {return super.onStartCommand(intent, flags, startId);}@Overridepublic void onDestroy() {super.onDestroy();EventBus.getDefault().unregister(this);startService(new Intent(this, LogoService.class));}public class MyAsynaTask extends AsyncTask<String, Integer, Bitmap> {LogoInfo logoInfo;public MyAsynaTask(LogoInfo logoInfo) {this.logoInfo = logoInfo;}@Overrideprotected void onPreExecute() {// TODO Auto-generated method stubsuper.onPreExecute();}@Overrideprotected Bitmap doInBackground(String... params) {// TODO Auto-generated method stubBitmap bitmap = null;try {URL url = new URL(params[0]);HttpURLConnection connection = (HttpURLConnection) url.openConnection();connection.setDoInput(true);connection.connect();InputStream inputStream = connection.getInputStream();bitmap = BitmapFactory.decodeStream(inputStream);inputStream.close();} catch (Exception e) {// TODO: handle exception}return bitmap;}@Overrideprotected void onProgressUpdate(Integer... values) {// TODO Auto-generated method stub}@Overrideprotected void onPostExecute(Bitmap result) {// TODO Auto-generated method stubsuper.onPostExecute(result);boolean isFullBitmap = true;this.logoInfo.picbitmap = result;for (int j = 0; j < LogoApplication.tempLogoInfoList.size(); j++) {if (LogoApplication.tempLogoInfoList.get(j).picbitmap == null) {isFullBitmap = false;break;}}File file = new File(this.logoInfo.adImageUrl.trim());String fileName = file.getName();this.logoInfo.downPicName = fileName;File sdFile = new File(LogoApplication.picPath + fileName);if (!sdFile.exists() && result != null) {LG.e(DownloadPicFromClient.class, "this.logoInfo.adImageUrl = " + this.logoInfo.adImageUrl);saveCroppedImage(result, this.logoInfo.adImageUrl);}if (isFullBitmap) {getFileCountAndName();EventBus.getDefault().post("play advertisement");}}}private void saveCroppedImage(Bitmap bmp, String picUrl) {File file = new File("/sdcard/LogoWidget");if (!file.exists())file.mkdir();file = new File(("/sdcard/" + picUrl).trim());String fileName = file.getName();String mName = fileName.substring(0, fileName.lastIndexOf("."));String sName = fileName.substring(fileName.lastIndexOf("."));String newFilePath = LogoApplication.picPath + mName + sName;file = new File(newFilePath);if (fileIsExists(newFilePath)) {} else {try {file.createNewFile();FileOutputStream fos = new FileOutputStream(file);bmp.compress(Bitmap.CompressFormat.JPEG, 50, fos);fos.flush();fos.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}public void getFileCountAndName() {getFiles(LogoApplication.picPath);}public boolean fileIsExists(String strFile) {try {File f = new File(strFile);if (!f.exists()) {return false;}} catch (Exception e) {return false;}return true;}private void getFiles(String string) {// TODO Auto-generated method stubFile file = new File(string);File[] files = file.listFiles();for (int j = 0; j < files.length; j++) {String name = files[j].getName();if (files[j].isDirectory()) {String dirPath = files[j].toString().toLowerCase();Log.d("shifuqiang", "dirPath" + dirPath);getFiles(dirPath + "/");} else if (files[j].isFile() & name.endsWith(".jpg") || name.endsWith(".png") || name.endsWith(".bmp") || name.endsWith(".gif") || name.endsWith(".jpeg")) {Log.d("shifuqiang", "FileName===" + files[j].getName());LogoApplication.picNameList.add(files[j].getName());i++;}}deletePicFromSDCard(LogoApplication.picNameList);}public void deletePicFromSDCard(List<String> picName) {for (int i = 0; i < picName.size(); i++) {boolean sdExitPic = false;for (int j = 0; j < LogoApplication.tempLogoInfoList.size(); j++) {if (LogoApplication.tempLogoInfoList.get(j).adImageUrl.contains((CharSequence) picName.get(i))) {sdExitPic = true;break;}}if (!sdExitPic) {deleteFileFromSDEx(picName.get(i));}}}public void deleteFileFromSDEx(String fileName) {File deletefile = new File(LogoApplication.picPath + fileName);deletefile.delete();}
}

代码虽然有点长，也是当时不太规范，所以写的乱七八糟的，但是通过名字都能知道是什么意思就不多说了
下载完之后就去播放图片

public class LogoService extends Service {private static final String TAG = "LogoService";RemoteViews views;List<PackageInfo> list;PackageManager packageManager;Context mcontext;int playcount;@Overridepublic void onCreate() {super.onCreate();views = new RemoteViews(getPackageName(), R.layout.adv_service_layout);packageManager = this.getPackageManager();mcontext = getApplicationContext();}@Overridepublic void onStart(Intent intent, int startId) {super.onStart(intent, startId);GetDataFromClient.getdataFromClient(getApplicationContext());if (!EventBus.getDefault().isRegistered(this))EventBus.getDefault().register(this);if (null == views)views = new RemoteViews(getPackageName(), R.layout.adv_service_layout);}public void onEventMainThread(String playAdvertisement) {if (null == views)views = new RemoteViews(getPackageName(), R.layout.adv_service_layout);views.setImageViewResource(R.id.adv_imageview, R.drawable.define_head);if (mHander.hasMessages(0))mHander.removeCallbacksAndMessages(null);LogoApplication.logoinfolist.clear();for (int i = 0; i < LogoApplication.tempLogoInfoList.size(); i++) {LogoApplication.logoinfolist.add(LogoApplication.tempLogoInfoList.get(i));}if (LogoApplication.logoinfolist.size() == 1) {refreshWidget();} else if (LogoApplication.logoinfolist.size() > 1) {mHander.sendEmptyMessage(0);}}@Overridepublic IBinder onBind(Intent intent) {return null;}@Overridepublic int onStartCommand(Intent intent, int flags, int startId) {return super.onStartCommand(intent, flags, startId);}@Overridepublic void onDestroy() {super.onDestroy();EventBus.getDefault().unregister(this);mHander.removeCallbacksAndMessages(null);startService(new Intent(this, LogoService.class));}Handler mHander = new Handler() {public void handleMessage(Message msg) {super.handleMessage(msg);refreshWidget();LG.e(LogoService.class, "handler post");mHander.sendEmptyMessageDelayed(0, 5000);}};public void getBitMapFromSDCard(String path, RemoteViews views) {File mFile = new File(path);if (mFile.exists()) {Bitmap bitmap = BitmapFactory.decodeFile(path);views.setImageViewBitmap(R.id.adv_imageview, bitmap);}}public void refreshWidget() {if (LogoApplication.logoinfolist == null|| LogoApplication.logoinfolist.isEmpty())return;if (null == views)views = new RemoteViews(getPackageName(), R.layout.adv_service_layout);if (LogoApplication.logoinfolist.get(playcount% LogoApplication.logoinfolist.size()).picbitmap != null) {views.setImageViewBitmap(R.id.adv_imageview, LogoApplication.logoinfolist.get(playcount% LogoApplication.logoinfolist.size()).picbitmap);} else {String sdPicPath = LogoApplication.picPath + LogoApplication.logoinfolist.get(playcount% LogoApplication.logoinfolist.size()).downPicName;getBitMapFromSDCard(sdPicPath, views);}list = packageManager.getInstalledPackages(0);boolean hasadvpackage = false;for (PackageInfo packageInfo : list) {if (packageInfo.packageName.equals(LogoApplication.logoinfolist.get(playcount% LogoApplication.logoinfolist.size()).adAppActionPackageName)) {hasadvpackage = true;break;}}Intent mintented = new Intent();if (hasadvpackage) {PackageManager packageManager = this.getPackageManager();mintented = packageManager.getLaunchIntentForPackage("com.yuyu.android.pcam");} else {Uri uri = Uri.parse(LogoApplication.logoinfolist.get(playcount% LogoApplication.logoinfolist.size()).adBrowserAction);mintented.setAction(Intent.ACTION_VIEW);mintented.setData(uri);}mintented.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED | Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, mintented, 0);views.setOnClickPendingIntent(R.id.adv_imageview, pendingIntent);AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(getApplicationContext());ComponentName componentName = new ComponentName(getApplicationContext(), LogoAppWidgetProvider.class);appWidgetManager.updateAppWidget(componentName, views);playcount++;}
}

剩下的就是一些bean，接口类，和帮助类了
CheckWifiConnect.java

public static boolean isNetworkConnected(Context context) {if (context != null) {ConnectivityManager mConnectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();if (mNetworkInfo != null) {return mNetworkInfo.isAvailable();}}return false;}public static boolean isWifiConnected(Context context) {if (context != null) {ConnectivityManager mConnectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo mWiFiNetworkInfo = mConnectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);if (mWiFiNetworkInfo != null) {return mWiFiNetworkInfo.isConnected();}}return false;}public static boolean isMobileConnected(Context context) {if (context != null) {ConnectivityManager mConnectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo mMobileNetworkInfo = mConnectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);if (mMobileNetworkInfo != null) {return mMobileNetworkInfo.isConnected();}}return false;}

HttpResponseListener.java

public interface HttpResponseListener {void httpResponse(String jsonObject);void httpREsponseError(VolleyError error);
}

LogoInfo.java

public class LogoInfo {String adId;String adName;String adSerialNumber;String advertiserId;String adStartTime;String adEndTime;String adAppActionPackageName;String adAppActionClassName;String adAppStoreAction;String adBrowserAction;String adImageUrl;String adImageShowInterval;String adState;String adDurationTime;String DelayedStartTime;String DelayedEndTime;public Bitmap picbitmap;public String downPicName;
}

网络数据请求封装类VolleyRequest.java

public class VolleyRequest {public StringRequest stringRequest;public HttpResponseListener httpResponseListener;public void setHttpResponseListener(HttpResponseListener httpResponseListener) {this.httpResponseListener = httpResponseListener;}public void RequestPost(String url, String tag) {LogoApplication.getHttpQueues().cancelAll(tag);stringRequest = new StringRequest(url,  new Response.Listener<String>() {  @Override  public void onResponse(String response) {httpResponseListener.httpResponse(response);}  }, new Response.ErrorListener() {  @Override  public void onErrorResponse(VolleyError error) {   httpResponseListener.httpREsponseError(error);}  });  stringRequest.setTag(tag);LogoApplication.getHttpQueues().add(stringRequest);}
}

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