android app develop utils

/* * Copyright (C) 2012 www.apkdv.com *  * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *     http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package lengyue.apkdv.golddemo;import android.app.Activity;import android.app.ActivityManager;import android.app.ActivityManager.RunningServiceInfo;import android.content.Context;import android.content.Intent;import android.content.pm.PackageInfo;import android.content.res.Resources;import android.location.LocationManager;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.net.Uri;import android.telephony.TelephonyManager;import android.util.DisplayMetrics;import android.view.inputmethod.InputMethodManager;import java.io.File;import java.io.FileFilter;import java.io.FileOutputStream;import java.io.InputStream;import java.util.Iterator;import java.util.List;import java.util.regex.Pattern;// TODO: Auto-generated Javadoc/** * © 2012 apkdv.com * 名称：AbAppUtil.java * 描述：应用工具类. * * @author LengYue * @version v1.0 * @date：2013-11-10 下午11:52:13 */public class DvAppUtil {    /**     * 描述：打开并安装文件.     *     * @param context the context     * @param file    apk文件路径     */public static void installApk(Context context, File file) {        Intent intent = new Intent();        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        intent.setAction(Intent.ACTION_VIEW);        intent.setDataAndType(Uri.fromFile(file),                "application/vnd.android.package-archive");        context.startActivity(intent);    }    /**     * 描述：卸载程序.     *     * @param context     the context     * @param packageName 包名     */public static void uninstallApk(Context context, String packageName) {        Intent intent = new Intent(Intent.ACTION_DELETE);        Uri packageURI = Uri.parse("package:" + packageName);        intent.setData(packageURI);        context.startActivity(intent);    }    /**     * 用来判断服务是否运行.     *     * @param ctx       the ctx     * @param className 判断的服务名字 "com.xxx.xx..XXXService"     * @return true 在运行 false 不在运行     */public static boolean isServiceRunning(Context ctx, String className) {        boolean isRunning = false;        ActivityManager activityManager = (ActivityManager) ctx.getSystemService(Context.ACTIVITY_SERVICE);        List<RunningServiceInfo> servicesList = activityManager.getRunningServices(Integer.MAX_VALUE);        Iterator<RunningServiceInfo> l = servicesList.iterator();        while (l.hasNext()) {            RunningServiceInfo si = (RunningServiceInfo) l.next();            if (className.equals(si.service.getClassName())) {                isRunning = true;            }        }        return isRunning;    }    /**     * 停止服务.     *     * @param ctx       the ctx     * @param className the class name     * @return true, if successful     */public static boolean stopRunningService(Context ctx, String className) {        Intent intent_service = null;        boolean ret = false;        try {            intent_service = new Intent(ctx, Class.forName(className));        } catch (Exception e) {            e.printStackTrace();        }        if (intent_service != null) {            ret = ctx.stopService(intent_service);        }        return ret;    }    /**     * Gets the number of cores available in this device, across all processors.     * Requires: Ability to peruse the filesystem at "/sys/devices/system/cpu"     *     * @return The number of cores, or 1 if failed to get result     */public static int getNumCores() {        try {            //Get directory containing CPU infoFile dir = new File("/sys/devices/system/cpu/");            //Filter to only list the devices we care aboutFile[] files = dir.listFiles(new FileFilter() {                @Overridepublic boolean accept(File pathname) {                    //Check if filename is "cpu", followed by a single digit numberif (Pattern.matches("cpu[0-9]", pathname.getName())) {                        return true;                    }                    return false;                }            });            //Return the number of cores (virtual CPU devices)return files.length;        } catch (Exception e) {            //Default to return 1 corereturn 1;        }    }    /**     * 描述：判断网络是否有效.     *     * @param context the context     * @return true, if is network available     */public static boolean isNetworkAvailable(Context context) {        try {            ConnectivityManager connectivity = (ConnectivityManager) context                    .getSystemService(Context.CONNECTIVITY_SERVICE);            if (connectivity != null) {                NetworkInfo info = connectivity.getActiveNetworkInfo();                if (info != null && info.isConnected()) {                    if (info.getState() == NetworkInfo.State.CONNECTED) {                        return true;                    }                }            }        } catch (Exception e) {            return false;        }        return false;    }    /**     * Gps是否打开     * 需要<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />权限     *     * @param context the context     * @return true, if is gps enabled     */public static boolean isGpsEnabled(Context context) {        LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);        return lm.isProviderEnabled(LocationManager.GPS_PROVIDER);    }    /**     * wifi是否打开.     *     * @param context the context     * @return true, if is wifi enabled     */public static boolean isWifiEnabled(Context context) {        ConnectivityManager mgrConn = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        TelephonyManager mgrTel = (TelephonyManager) context                .getSystemService(Context.TELEPHONY_SERVICE);        return ((mgrConn.getActiveNetworkInfo() != null && mgrConn                .getActiveNetworkInfo().getState() == NetworkInfo.State.CONNECTED) || mgrTel                .getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS);    }    /**     * 判断当前网络是否是wifi网络.     *     * @param context the context     * @return boolean     */public static boolean isWifi(Context context) {        ConnectivityManager connectivityManager = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();        if (activeNetInfo != null&& activeNetInfo.getType() == ConnectivityManager.TYPE_WIFI) {            return true;        }        return false;    }    /**     * 判断当前网络是否是移动数据网络.     *     * @param context the context     * @return boolean     */public static boolean isMobile(Context context) {        ConnectivityManager connectivityManager = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();        if (activeNetInfo != null&& activeNetInfo.getType() == ConnectivityManager.TYPE_MOBILE) {            return true;        }        return false;    }    /**     * 导入数据库.     *     * @param context the context     * @param dbName  the db name     * @param rawRes  the raw res     * @return true, if successful     */public static boolean importDatabase(Context context, String dbName, int rawRes) {        int buffer_size = 1024;        InputStream is = null;        FileOutputStream fos = null;        boolean flag = false;        try {            String dbPath = "/data/data/" + context.getPackageName() + "/databases/" + dbName;            File dbfile = new File(dbPath);            //判断数据库文件是否存在，若不存在则执行导入，否则直接打开数据库if (!dbfile.exists()) {                //欲导入的数据库if (!dbfile.getParentFile().exists()) {                    dbfile.getParentFile().mkdirs();                }                dbfile.createNewFile();                is = context.getResources().openRawResource(rawRes);                fos = new FileOutputStream(dbfile);                byte[] buffer = new byte[buffer_size];                int count = 0;                while ((count = is.read(buffer)) > 0) {                    fos.write(buffer, 0, count);                }                fos.flush();            }            flag = true;        } catch (Exception e) {            e.printStackTrace();        } finally {            if (fos != null) {                try {                    fos.close();                } catch (Exception e) {                }            }            if (is != null) {                try {                    is.close();                } catch (Exception e) {                }            }        }        return flag;    }    /**     * 获取屏幕尺寸与密度.     *     * @param context the context     * @return mDisplayMetrics     */public static DisplayMetrics getDisplayMetrics(Context context) {        Resources mResources;        if (context == null) {            mResources = Resources.getSystem();        } else {            mResources = context.getResources();        }        //DisplayMetrics{density=1.5, width=480, height=854, scaledDensity=1.5, xdpi=160.421, ydpi=159.497}        //DisplayMetrics{density=2.0, width=720, height=1280, scaledDensity=2.0, xdpi=160.42105, ydpi=160.15764}DisplayMetrics mDisplayMetrics = mResources.getDisplayMetrics();        return mDisplayMetrics;    }    /**     * 打开键盘.     *     * @param context the context     */public static void showSoftInput(Context context) {        InputMethodManager inputMethodManager = (InputMethodManager) context                .getSystemService(Context.INPUT_METHOD_SERVICE);        inputMethodManager.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);    }    /**     * 关闭键盘事件.     *     * @param context the context     */public static void closeSoftInput(Context context) {        InputMethodManager inputMethodManager = (InputMethodManager) context                .getSystemService(Context.INPUT_METHOD_SERVICE);        if (inputMethodManager != null && ((Activity) context).getCurrentFocus() != null) {            inputMethodManager.hideSoftInputFromWindow(((Activity) context).getCurrentFocus()                    .getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);        }    }    /**     * 获取包信息.     *     * @param context the context     */public static PackageInfo getPackageInfo(Context context) {        PackageInfo info = null;        try {            String packageName = context.getPackageName();            info = context.getPackageManager().getPackageInfo(packageName, 0);        } catch (Exception e) {            e.printStackTrace();        }        return info;    }}
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