Android 开发人员不得不收集的代码 (不断更新)

为方便查找，已进行大致归类，其目录如下所示：

尺寸相关

dp与px转换 dp2px、px2dp

sp与px转换 sp2px、px2sp

各种单位转换 applyDimension

在onCreate()即可获取View的宽高 getViewMeasure

ListView中提前测量View尺寸 measureView

手机相关

判断设备是否是手机 isPhone

获取当前设备的IMIE，需与上面的isPhone一起使用 getDeviceIMEI

获取手机状态信息 getPhoneStatus

是否有SD卡 haveSDCard

获取MAC地址 getMacAddress

获取手机厂商，如Xiaomi getManufacturer

获取手机型号，如MI2SC getModel

拨打电话 callDial

发送短信 sendSms

获取手机联系人 getAllContactInfo

直接打开手机联系人界面，并获取联系人号码

获取手机短信并保存到xml中 getAllSMS

网络相关

打开网络设置界面 openSetting

判断是否网络连接 isOnline

判断wifi是否连接状态 isWifi

获取移动网络运营商名称，如中国联通、中国移动、中国电信 getNetworkOperatorName

返回移动终端类型 getPhoneType

判断手机连接的网络类型(2G,3G,4G) getNetWorkClass

判断当前手机的网络类型(WIFI还是2,3,4G) getNetWorkStatus

App相关

安装指定路径下的Apk installApk

卸载指定包名的App uninstallApp

获取App名称 getAppName

获取当前App版本号 getVersonName

获取当前App版本Code getVersionCode

打开指定包名的App openOtherApp

打开指定包名的App应用信息界面 showAppInfo

分享Apk信息 shareApkInfo

获取App信息的一个封装类(包名、版本号、应用信息、图标、名称等) getAppInfos

判断当前App处于前台还是后台 isApplicationBackground

屏幕相关

获取手机分辨率 getDeviceWidth、getDeviceHeight

获取状态栏高度 getStatusBarHeight

获取状态栏高度＋标题栏(ActionBar)高度 getTopBarHeight

获取屏幕截图 snapShotWithStatusBar、snapShotWithoutStatusBar

设置透明状态栏，需在setContentView之前调用

键盘相关

避免输入法面板遮挡

动态隐藏软键盘 hideSoftInput

点击屏幕空白区域隐藏软键盘

动态显示软键盘 showSoftInput

切换键盘显示与否状态 toggleSoftInput

正则相关

加解密相关

MD5加密 encryptMD5

SHA加密 encryptSHA

未归类

获取服务是否开启 isRunningService

更新Log

做这份整理只是想把它作为Android的一本小字典，当遇到一些琐碎问题时，不用再面向百度或者谷歌查询API的使用，费时费力，这里有的话，大家尽管撸走。希望它能逐日壮大起来，期待你的Star和完善，用途的话大家想把它们整理成工具类或者什么的话都可以，之后我也会封装工具类并分享之，但本篇只是提供查阅，毕竟看md比看类文件要爽多了，其中好多代码我也是各种搜刮来的，也要谢谢各位的总结，大部分代码已验证过可行，如有错误，请及时告之。

分类已上传至Github，传送门→期待你的Star和完善

好了，废话不多说，开始开车，嘟嘟......

尺寸相关

dp与px转换

/**
* dp转px
*/
public static int dp2px(Context context, float dpValue) {
    final float scale = context.getResources().getDisplayMetrics().density;
    return (int) (dpValue * scale + 0.5f);
}

/**
* px转dp
*/
public static int px2dp(Context context, float pxValue) {
    final float scale = context.getResources().getDisplayMetrics().density;
    return (int) (pxValue / scale + 0.5f);
}

sp与px转换

/**
* sp转px
*/
public static int sp2px(Context context, float spValue) {
    final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
    return (int) (spValue * fontScale + 0.5f);
}

/**
* px转sp
*/
public static int px2sp(Context context, float pxValue) {
    final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
    return (int) (pxValue / fontScale + 0.5f);
}

各种单位转换

// 该方法存在于TypedValue
/**
* 各种单位转换
*/
public static float applyDimension(int unit, float value, DisplayMetrics metrics) {
    switch (unit) {
        case TypedValue.COMPLEX_UNIT_PX:
            return value;
        case TypedValue.COMPLEX_UNIT_DIP:
            return value * metrics.density;
        case TypedValue.COMPLEX_UNIT_SP:
            return value * metrics.scaledDensity;
        case TypedValue.COMPLEX_UNIT_PT:
            return value * metrics.xdpi * (1.0f / 72);
        case TypedValue.COMPLEX_UNIT_IN:
            return value * metrics.xdpi;
        case TypedValue.COMPLEX_UNIT_MM:
            return value * metrics.xdpi * (1.0f / 25.4f);
    }
    return 0;
}

在onCreate()即可获取View的宽高

/**
* 在onCreate()即可获取View的宽高
*/
public static int[] getViewMeasure(View view) {
    int widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
    int heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
    view.measure(widthMeasureSpec, heightMeasureSpec);
    return new int[]{view.getMeasuredWidth(), view.getMeasuredHeight()};
}

ListView中提前测量View尺寸

// 通知父布局，占用的宽，高；
/**
* ListView中提前测量View尺寸，如headerView
*/
private void measureView(View view) {
    ViewGroup.LayoutParams p = view.getLayoutParams();
    if (p == null) {
        p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
    }
    int width = ViewGroup.getChildMeasureSpec(0, 0, p.width);
    int height;
    int tempHeight = p.height;
    if (tempHeight > 0) {
        height = MeasureSpec.makeMeasureSpec(tempHeight,
                MeasureSpec.EXACTLY);
    } else {
        height = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
    }
    view.measure(width, height);
}

手机相关

判断设备是否是手机

/**
* 判断设备是否是手机
*/
public static boolean isPhone(Context context) {
    TelephonyManager telephony = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
    return telephony.getPhoneType() != TelephonyManager.PHONE_TYPE_NONE;
}

获取当前设备的IMIE，需与上面的isPhone一起使用

/**
* 获取当前设备的IMIE，需与上面的isPhone一起使用
*/
public static String getDeviceIMEI(Context context) {
    String deviceId;
    if (isPhone(context)) {
        TelephonyManager telephony = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        deviceId = telephony.getDeviceId();
    } else {
        deviceId = Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ANDROID_ID);
    }
    return deviceId;
}

获取手机状态信息

// 需添加权限
/**
* 获取手机状态信息
*
* 返回如下
* DeviceId(IMEI) = 99000311726612
* DeviceSoftwareVersion = 00
* Line1Number =
* NetworkCountryIso = cn
* NetworkOperator = 46003
* NetworkOperatorName = 中国电信
* NetworkType = 6
* honeType = 2
* SimCountryIso = cn
* SimOperator = 46003
* SimOperatorName = 中国电信
* SimSerialNumber = 89860315045710604022
* SimState = 5
* SubscriberId(IMSI) = 460030419724900
* VoiceMailNumber = *86
*/
public static String getPhoneStatus(Context context) {
    TelephonyManager tm = (TelephonyManager) context
            .getSystemService(Context.TELEPHONY_SERVICE);
    String str = "";
    str += "DeviceId(IMEI) = " + tm.getDeviceId() + "\n";
    str += "DeviceSoftwareVersion = " + tm.getDeviceSoftwareVersion() + "\n";
    str += "Line1Number = " + tm.getLine1Number() + "\n";
    str += "NetworkCountryIso = " + tm.getNetworkCountryIso() + "\n";
    str += "NetworkOperator = " + tm.getNetworkOperator() + "\n";
    str += "NetworkOperatorName = " + tm.getNetworkOperatorName() + "\n";
    str += "NetworkType = " + tm.getNetworkType() + "\n";
    str += "honeType = " + tm.getPhoneType() + "\n";
    str += "SimCountryIso = " + tm.getSimCountryIso() + "\n";
    str += "SimOperator = " + tm.getSimOperator() + "\n";
    str += "SimOperatorName = " + tm.getSimOperatorName() + "\n";
    str += "SimSerialNumber = " + tm.getSimSerialNumber() + "\n";
    str += "SimState = " + tm.getSimState() + "\n";
    str += "SubscriberId(IMSI) = " + tm.getSubscriberId() + "\n";
    str += "VoiceMailNumber = " + tm.getVoiceMailNumber() + "\n";
    return str;
}

是否有SD卡

/**
* 是否有SD卡
*/
public static boolean haveSDCard() {
    return android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
}

获取MAC地址

// 需添加权限
/**
* 获取MAC地址
*/
public static String getMacAddress(Context context) {
    String macAddress;
    WifiManager wifi = (WifiManager) context
            .getSystemService(Context.WIFI_SERVICE);
    WifiInfo info = wifi.getConnectionInfo();
    macAddress = info.getMacAddress();
    if (null == macAddress) {
        return "";
    }
    macAddress = macAddress.replace(":", "");
    return macAddress;
}

获取手机厂商，如Xiaomi

/**
* 获取手机厂商，如Xiaomi
*/
public static String getManufacturer() {
    String MANUFACTURER = Build.MANUFACTURER;
    return MANUFACTURER;
}

获取手机型号，如MI2SC

/**
* 获取手机型号，如MI2SC
*/
private String getModel() {
    String model = android.os.Build.MODEL;
    if (model != null) {
        model = model.trim().replaceAll("\\s*", "");
    } else {
        model = "";
    }
    return model;
}

拨打电话

// 需添加权限
/**
* 拨打电话
*/
public static void callDial(Context context, String phoneNumber) {
    context.startActivity(new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + phoneNumber)));
}

发送短信

/**
* 发送短信
*/
public static void sendSms(Context context, String phoneNumber, String content) {
    Uri uri = Uri.parse("smsto:" + (TextUtils.isEmpty(phoneNumber) ? "" : phoneNumber));
    Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
    intent.putExtra("sms_body", TextUtils.isEmpty(content) ? "" : content);
    context.startActivity(intent);
}

获取手机联系人

/**
* 获取手机联系人
*/
public static List> getAllContactInfo(Context context) {
    SystemClock.sleep(3000);
    ArrayList> list = new ArrayList>();
    // 1.获取内容解析者
    ContentResolver resolver = context.getContentResolver();
    // 2.获取内容提供者的地址:com.android.contacts
    // raw_contacts表的地址 :raw_contacts
    // view_data表的地址 : data
    // 3.生成查询地址
    Uri raw_uri = Uri.parse("content://com.android.contacts/raw_contacts");
    Uri date_uri = Uri.parse("content://com.android.contacts/data");
    // 4.查询操作,先查询raw_contacts,查询contact_id
    // projection : 查询的字段
    Cursor cursor = resolver.query(raw_uri, new String[] { "contact_id" },
            null, null, null);
    // 5.解析cursor
    while (cursor.moveToNext()) {
        // 6.获取查询的数据
        String contact_id = cursor.getString(0);
        // cursor.getString(cursor.getColumnIndex("contact_id"));//getColumnIndex
        // : 查询字段在cursor中索引值,一般都是用在查询字段比较多的时候
        // 判断contact_id是否为空
        if (!TextUtils.isEmpty(contact_id)) {//null   ""
            // 7.根据contact_id查询view_data表中的数据
            // selection : 查询条件
            // selectionArgs :查询条件的参数
            // sortOrder : 排序
            // 空指针: 1.null.方法 2.参数为null
            Cursor c = resolver.query(date_uri, new String[] { "data1",
                            "mimetype" }, "raw_contact_id=?",
                    new String[] { contact_id }, null);
            HashMap map = new HashMap();
            // 8.解析c
            while (c.moveToNext()) {
                // 9.获取数据
                String data1 = c.getString(0);
                String mimetype = c.getString(1);
                // 10.根据类型去判断获取的data1数据并保存
                if (mimetype.equals("vnd.android.cursor.item/phone_v2")) {
                    // 电话
                    map.put("phone", data1);
                } else if (mimetype.equals("vnd.android.cursor.item/name")) {
                    // 姓名
                    map.put("name", data1);
                }
            }
            // 11.添加到集合中数据
            list.add(map);
            // 12.关闭cursor
            c.close();
        }
    }
    // 12.关闭cursor
    cursor.close();
    return list;
}

直接打开手机联系人界面，并获取联系人号码

// 在按钮点击事件中设置Intent，
Intent intent = new Intent();
intent.setAction("android.intent.action.PICK");
intent.addCategory("android.intent.category.DEFAULT");
intent.setType("vnd.android.cursor.dir/phone_v2");
startActivityForResult(intent, 1);
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (data != null) {
        Uri uri = data.getData();
        String num = null;
        // 创建内容解析者
        ContentResolver contentResolver = getContentResolver();
        Cursor cursor = contentResolver.query(uri,
                null, null, null, null);
        while (cursor.moveToNext()) {
            num = cursor.getString(cursor.getColumnIndex("data1"));
        }
        cursor.close();
        num = num.replaceAll("-", "");//替换的操作,555-6 -> 5556
    }
}

获取手机短信并保存到xml中

/**
* 获取手机短信并保存到xml中
*/
public static void getAllSMS(Context context) {
    //1.获取短信
    //1.1获取内容解析者
    ContentResolver resolver = context.getContentResolver();
    //1.2获取内容提供者地址   sms,sms表的地址:null  不写
    //1.3获取查询路径
    Uri uri = Uri.parse("content://sms");
    //1.4.查询操作
    //projection : 查询的字段
    //selection : 查询的条件
    //selectionArgs : 查询条件的参数
    //sortOrder : 排序
    Cursor cursor = resolver.query(uri, new String[]{"address", "date", "type", "body"}, null, null, null);
    //设置最大进度
    int count = cursor.getCount();//获取短信的个数
    //2.备份短信
    //2.1获取xml序列器
    XmlSerializer xmlSerializer = Xml.newSerializer();
    try {
        //2.2设置xml文件保存的路径
        //os : 保存的位置
        //encoding : 编码格式
        xmlSerializer.setOutput(new FileOutputStream(new File("/mnt/sdcard/backupsms.xml")), "utf-8");
        //2.3设置头信息
        //standalone : 是否独立保存
        xmlSerializer.startDocument("utf-8", true);
        //2.4设置根标签
        xmlSerializer.startTag(null, "smss");
        //1.5.解析cursor
        while (cursor.moveToNext()) {
            SystemClock.sleep(1000);
            //2.5设置短信的标签
            xmlSerializer.startTag(null, "sms");
            //2.6设置文本内容的标签
            xmlSerializer.startTag(null, "address");
            String address = cursor.getString(0);
            //2.7设置文本内容
            xmlSerializer.text(address);
            xmlSerializer.endTag(null, "address");
            xmlSerializer.startTag(null, "date");
            String date = cursor.getString(1);
            xmlSerializer.text(date);
            xmlSerializer.endTag(null, "date");
            xmlSerializer.startTag(null, "type");
            String type = cursor.getString(2);
            xmlSerializer.text(type);
            xmlSerializer.endTag(null, "type");
            xmlSerializer.startTag(null, "body");
            String body = cursor.getString(3);
            xmlSerializer.text(body);
            xmlSerializer.endTag(null, "body");
            xmlSerializer.endTag(null, "sms");
            System.out.println("address:" + address + "   date:" + date + "  type:" + type + "  body:" + body);
        }
        xmlSerializer.endTag(null, "smss");
        xmlSerializer.endDocument();
        //2.8将数据刷新到文件中
        xmlSerializer.flush();
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

网络相关

打开网络设置界面

/**
* 打开网络设置界面
*/
public static void openSetting(Activity activity) {
    Intent intent = new Intent("/");
    ComponentName cm = new ComponentName("com.android.settings",
            "com.android.settings.WirelessSettings");
    intent.setComponent(cm);
    intent.setAction("android.intent.action.VIEW");
    activity.startActivityForResult(intent, 0);
}

判断是否网络连接

/**
* 判断是否网络连接
*/
public static boolean isOnline(Context context) {
    ConnectivityManager manager = (ConnectivityManager) context
            .getSystemService(Activity.CONNECTIVITY_SERVICE);
    NetworkInfo info = manager.getActiveNetworkInfo();
    if (info != null && info.isConnected()) {
        return true;
    }
    return false;
}

判断wifi是否连接状态

/**
* 判断wifi是否连接状态
*/
public static boolean isWifi(Context context) {
    ConnectivityManager cm = (ConnectivityManager) context
            .getSystemService(Context.CONNECTIVITY_SERVICE);
    return cm != null && cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_WIFI;
}

获取移动网络运营商名称，如中国联通、中国移动、中国电信

/**
* 获取移动网络运营商名称，如中国联通、中国移动、中国电信
*/
public static String getNetworkOperatorName(Context context) {
    TelephonyManager telephonyManager = (TelephonyManager) context
            .getSystemService(Context.TELEPHONY_SERVICE);
    return telephonyManager.getNetworkOperatorName();
}

返回移动终端类型

// PHONE_TYPE_NONE :0 手机制式未知
// PHONE_TYPE_GSM :1 手机制式为GSM，移动和联通
// PHONE_TYPE_CDMA :2 手机制式为CDMA，电信
// PHONE_TYPE_SIP:3
/**
* 返回移动终端类型
*/
public static int getPhoneType(Context context) {
    TelephonyManager telephonyManager = (TelephonyManager) context
            .getSystemService(Context.TELEPHONY_SERVICE);
    return telephonyManager.getPhoneType();
}

判断手机连接的网络类型(2G,3G,4G)

// 联通的3G为UMTS或HSDPA，移动和联通的2G为GPRS或EGDE，电信的2G为CDMA，电信的3G为EVDO
public class Constants {
    /**
     * Unknown network class
     */
    public static final int NETWORK_CLASS_UNKNOWN = 0;
    /**
     * wifi net work
     */
    public static final int NETWORK_WIFI = 1;
    /**
     * "2G" networks
     */
    public static final int NETWORK_CLASS_2_G = 2;
    /**
     * "3G" networks
     */
    public static final int NETWORK_CLASS_3_G = 3;
    /**
     * "4G" networks
     */
    public static final int NETWORK_CLASS_4_G = 4;
}
/**
* 判断手机连接的网络类型(2G,3G,4G)
*/
public static int getNetWorkClass(Context context) {
    TelephonyManager telephonyManager = (TelephonyManager) context
            .getSystemService(Context.TELEPHONY_SERVICE);
    switch (telephonyManager.getNetworkType()) {
        case TelephonyManager.NETWORK_TYPE_GPRS:
        case TelephonyManager.NETWORK_TYPE_EDGE:
        case TelephonyManager.NETWORK_TYPE_CDMA:
        case TelephonyManager.NETWORK_TYPE_1xRTT:
        case TelephonyManager.NETWORK_TYPE_IDEN:
            return Constants.NETWORK_CLASS_2_G;
        case TelephonyManager.NETWORK_TYPE_UMTS:
        case TelephonyManager.NETWORK_TYPE_EVDO_0:
        case TelephonyManager.NETWORK_TYPE_EVDO_A:
        case TelephonyManager.NETWORK_TYPE_HSDPA:
        case TelephonyManager.NETWORK_TYPE_HSUPA:
        case TelephonyManager.NETWORK_TYPE_HSPA:
        case TelephonyManager.NETWORK_TYPE_EVDO_B:
        case TelephonyManager.NETWORK_TYPE_EHRPD:
        case TelephonyManager.NETWORK_TYPE_HSPAP:
            return Constants.NETWORK_CLASS_3_G;
        case TelephonyManager.NETWORK_TYPE_LTE:
            return Constants.NETWORK_CLASS_4_G;
        default:
            return Constants.NETWORK_CLASS_UNKNOWN;
    }
}

判断当前手机的网络类型(WIFI还是2,3,4G)

/**
* 判断当前手机的网络类型(WIFI还是2,3,4G)，需要用到上面的方法
*/
public static int getNetWorkStatus(Context context) {
    int netWorkType = Constants.NETWORK_CLASS_UNKNOWN;
    ConnectivityManager connectivityManager = (ConnectivityManager) context
            .getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
    if (networkInfo != null && networkInfo.isConnected()) {
        int type = networkInfo.getType();
        if (type == ConnectivityManager.TYPE_WIFI) {
            netWorkType = Constants.NETWORK_WIFI;
        } else if (type == ConnectivityManager.TYPE_MOBILE) {
            netWorkType = getNetWorkClass(context);
        }
    }
    return netWorkType;
}

App相关

安装指定路径下的Apk

/**
* 安装指定路径下的Apk
*/
public void installApk(String filePath) {
    Intent intent = new Intent();
    intent.setAction("android.intent.action.VIEW");
    intent.addCategory("android.intent.category.DEFAULT");
    intent.setDataAndType(Uri.fromFile(new File(filePath)), "application/vnd.android.package-archive");
    startActivityForResult(intent, 0);
}

卸载指定包名的App

/**
* 卸载指定包名的App
*/
public void uninstallApp(String packageName) {
    Intent intent = new Intent();
    intent.setAction("android.intent.action.DELETE");
    intent.addCategory("android.intent.category.DEFAULT");
    intent.setData(Uri.parse("package:" + packageName));
    startActivityForResult(intent, 0);
}

获取App名称

/**
* 获取App名称
*/
public static String getAppName(Context context) {
    try {
        PackageManager packageManager = context.getPackageManager();
        PackageInfo packageInfo = packageManager.getPackageInfo(
                context.getPackageName(), 0);
        int labelRes = packageInfo.applicationInfo.labelRes;
        return context.getResources().getString(labelRes);
    } catch (NameNotFoundException e) {
        e.printStackTrace();
    }
    return null;
}

获取当前App版本号

/**
* 获取当前App版本号
*/
public static String getVersionName(Context context) {
    String versionName = null;
    PackageManager pm = context.getPackageManager();
    PackageInfo info = null;
    try {
        info = pm.getPackageInfo(context.getApplicationContext().getPackageName(), 0);
    } catch (NameNotFoundException e) {
        e.printStackTrace();
    }
    if (info != null) {
        versionName = info.versionName;
    }
    return versionName;
}

获取当前App版本Code

/**
* 获取当前App版本Code
*/
public static int getVersionCode(Context context) {
    int versionCode = 0;
    PackageManager pm = context.getPackageManager();
    PackageInfo info = null;
    try {
        info = pm.getPackageInfo(context.getApplicationContext().getPackageName(), 0);
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
    }
    if (info != null) {
        versionCode = info.versionCode;
    }
    return versionCode;
}

打开指定包名的App

/**
* 打开指定包名的App
*/
public void openOtherApp(String packageName){
    PackageManager manager = getPackageManager();
    Intent launchIntentForPackage = manager.getLaunchIntentForPackage(packageName);
    if (launchIntentForPackage != null) {
        startActivity(launchIntentForPackage);
    }
}

打开指定包名的App应用信息界面

/**
* 打开指定包名的App应用信息界面
*/
public void showAppInfo(String packageName) {
    Intent intent = new Intent();
    intent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
    intent.setData(Uri.parse("package:" + packageName));
    startActivity(intent);
}

分享Apk信息

/**
* 分享Apk信息
*/
public void shareApkInfo(String info) {
    Intent intent = new Intent();
    intent.setAction("android.intent.action.SEND");
    intent.addCategory("android.intent.category.DEFAULT");
    intent.setType("text/plain");
    intent.putExtra(Intent.EXTRA_TEXT, info);
    startActivity(intent);
}

获取App信息的一个封装类(包名、版本号、应用信息、图标、名称等)

/**
* 获取App信息的一个封装类(包名、版本号、应用信息、图标、名称等)
*/
public class AppEnging {
    public static List getAppInfos(Context context) {
        List list = new ArrayList();
        //获取应用程序信息
        //包的管理者
        PackageManager pm = context.getPackageManager();
        //获取系统中安装到所有软件信息
        List installedPackages = pm.getInstalledPackages(0);
        for (PackageInfo packageInfo : installedPackages) {
            //获取包名
            String packageName = packageInfo.packageName;
            //获取版本号
            String versionName = packageInfo.versionName;
            //获取application
            ApplicationInfo applicationInfo = packageInfo.applicationInfo;
            int uid = applicationInfo.uid;
            //获取应用程序的图标
            Drawable icon = applicationInfo.loadIcon(pm);
            //获取应用程序的名称
            String name = applicationInfo.loadLabel(pm).toString();
            //是否是用户程序
            //获取应用程序中相关信息,是否是系统程序和是否安装到SD卡
            boolean isUser;
            int flags = applicationInfo.flags;
            if ((applicationInfo.FLAG_SYSTEM & flags) == applicationInfo.FLAG_SYSTEM) {
                //系统程序
                isUser = false;
            } else {
                //用户程序
                isUser = true;
            }
            //是否安装到SD卡
            boolean isSD;
            if ((applicationInfo.FLAG_EXTERNAL_STORAGE & flags) == applicationInfo.FLAG_EXTERNAL_STORAGE) {
                //安装到了SD卡
                isSD = true;
            } else {
                //安装到手机中
                isSD = false;
            }
            //添加到bean中
            AppInfo appInfo = new AppInfo(name, icon, packageName, versionName, isSD, isUser);
            //将bean存放到list集合
            list.add(appInfo);
        }
        return list;
    }
}

// 封装软件信息的bean类
class AppInfo {
    //名称
    private String name;
    //图标
    private Drawable icon;
    //包名
    private String packagName;
    //版本号
    private String versionName;
    //是否安装到SD卡
    private boolean isSD;
    //是否是用户程序
    private boolean isUser;

    public AppInfo() {
        super();
    }

    public AppInfo(String name, Drawable icon, String packagName,
                   String versionName, boolean isSD, boolean isUser) {
        super();
        this.name = name;
        this.icon = icon;
        this.packagName = packagName;
        this.versionName = versionName;
        this.isSD = isSD;
        this.isUser = isUser;
    }
}

判断当前App处于前台还是后台

// 需添加
// 并且必须是系统应用该方法才有效
/**
* 判断当前App处于前台还是后台
*/
public static boolean isApplicationBackground(final Context context) {
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    @SuppressWarnings("deprecation")
    List tasks = am.getRunningTasks(1);
    if (!tasks.isEmpty()) {
        ComponentName topActivity = tasks.get(0).topActivity;
        if (!topActivity.getPackageName().equals(context.getPackageName())) {
            return true;
        }
    }
    return false;
}

屏幕相关

获取手机分辨率

/**
* 获取屏幕的宽度px
*/
public static int getDeviceWidth(Context context) {
    WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    DisplayMetrics outMetrics = new DisplayMetrics();// 创建了一张白纸
    windowManager.getDefaultDisplay().getMetrics(outMetrics);// 给白纸设置宽高
    return outMetrics.widthPixels;
}

/**
* 获取屏幕的高度px
*/
public static int getDeviceHeight(Context context) {
    WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    DisplayMetrics outMetrics = new DisplayMetrics();// 创建了一张白纸
    windowManager.getDefaultDisplay().getMetrics(outMetrics);// 给白纸设置宽高
    return outMetrics.heightPixels;
}

获取状态栏高度

/**
* 获取状态栏高度
*/
public int getStatusBarHeight() {
    int result = 0;
    int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
    if (resourceId > 0) {
        result = getResources().getDimensionPixelSize(resourceId);
    }
    return result;
}

获取状态栏高度＋标题栏(ActionBar)高度

/**
* 获取状态栏高度＋标题栏(ActionBar)高度
*/
public static int getTopBarHeight(Activity activity) {
    return activity.getWindow().findViewById(Window.ID_ANDROID_CONTENT).getTop();
}

获取屏幕截图

/**
* 获取当前屏幕截图，包含状态栏
*/
public static Bitmap snapShotWithStatusBar(Activity activity) {
    View view = activity.getWindow().getDecorView();
    view.setDrawingCacheEnabled(true);
    view.buildDrawingCache();
    Bitmap bmp = view.getDrawingCache();
    int width = getScreenWidth(activity);
    int height = getScreenHeight(activity);
    Bitmap bp = null;
    bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
    view.destroyDrawingCache();
    return bp;
}

/**
* 获取当前屏幕截图，不包含状态栏
*/
public static Bitmap snapShotWithoutStatusBar(Activity activity) {
    View view = activity.getWindow().getDecorView();
    view.setDrawingCacheEnabled(true);
    view.buildDrawingCache();
    Bitmap bmp = view.getDrawingCache();
    Rect frame = new Rect();
    activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
    int statusBarHeight = frame.top;
    int width = getScreenWidth(activity);
    int height = getScreenHeight(activity);
    Bitmap bp = null;
    bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height
            - statusBarHeight);
    view.destroyDrawingCache();
    return bp;
}

设置透明状态栏，需在setContentView之前调用

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
    //透明状态栏
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
    //透明导航栏
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
}

// 需在顶部控件布局中加入以下属性让内容出现在状态栏之下
android:clipToPadding="true" 
android:fitsSystemWindows="true"

键盘相关

避免输入法面板遮挡

// 在manifest.xml中activity中设置
android:windowSoftInputMode="stateVisible|adjustResize"

动态隐藏软键盘

/**
* 动态隐藏软键盘
*/
public static void hideSoftInput(Activity activity) {
    View view = activity.getWindow().peekDecorView();
    if (view != null) {
        InputMethodManager inputmanger = (InputMethodManager) activity
                .getSystemService(Context.INPUT_METHOD_SERVICE);
        inputmanger.hideSoftInputFromWindow(view.getWindowToken(), 0);
    }
}

/**
* 动态隐藏软键盘
*/
public static void hideSoftInput(Context context, EditText edit) {
    edit.clearFocus();
    InputMethodManager inputmanger = (InputMethodManager) context
            .getSystemService(Context.INPUT_METHOD_SERVICE);
    inputmanger.hideSoftInputFromWindow(edit.getWindowToken(), 0);
}

点击屏幕空白区域隐藏软键盘

// 方法1：在onTouch中处理，未获焦点则隐藏
/**
* 在onTouch中处理，未获焦点则隐藏
*/
@Override
public boolean onTouchEvent(MotionEvent event) {
    if (null != this.getCurrentFocus()) {
        InputMethodManager mInputMethodManager = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
        return mInputMethodManager.hideSoftInputFromWindow(this.getCurrentFocus().getWindowToken(), 0);
    }
    return super.onTouchEvent(event);
}

// 方法2：根据EditText所在坐标和用户点击的坐标相对比，来判断是否隐藏键盘，需重写dispatchTouchEvent
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
    if (ev.getAction() == MotionEvent.ACTION_DOWN) {
        View v = getCurrentFocus();
        if (isShouldHideKeyboard(v, ev)) {
            hideKeyboard(v.getWindowToken());
        }
    }
    return super.dispatchTouchEvent(ev);
}

/**
* 根据EditText所在坐标和用户点击的坐标相对比，来判断是否隐藏键盘
*/
private boolean isShouldHideKeyboard(View v, MotionEvent event) {
    if (v != null && (v instanceof EditText)) {
        int[] l = {0, 0};
        v.getLocationInWindow(l);
        int left = l[0],
                top = l[1],
                bottom = top + v.getHeight(),
                right = left + v.getWidth();
        return !(event.getX() > left && event.getX() < right
                && event.getY() > top && event.getY() < bottom);
    }
    return false;
}

/**
* 获取InputMethodManager，隐藏软键盘
*/
private void hideKeyboard(IBinder token) {
    if (token != null) {
        InputMethodManager im = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        im.hideSoftInputFromWindow(token, InputMethodManager.HIDE_NOT_ALWAYS);
    }
}

动态显示软键盘

/**
* 动态显示软键盘
*/
public static void showSoftInput(Context context, EditText edit) {
    edit.setFocusable(true);
    edit.setFocusableInTouchMode(true);
    edit.requestFocus();
    InputMethodManager inputManager = (InputMethodManager) context
            .getSystemService(Context.INPUT_METHOD_SERVICE);
    inputManager.showSoftInput(edit, 0);
}

切换键盘显示与否状态

/**
* 切换键盘显示与否状态
*/
public static void toggleSoftInput(Context context, EditText edit) {
    edit.setFocusable(true);
    edit.setFocusableInTouchMode(true);
    edit.requestFocus();
    InputMethodManager inputManager = (InputMethodManager) context
            .getSystemService(Context.INPUT_METHOD_SERVICE);
    inputManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
}

正则相关

正则工具类

public class RegularUtils {
    //验证手机号
    private static final String REGEX_MOBILE = "^(13[0-9]|14[5|7]|15[0|1|2|3|5|6|7|8|9]|18[0|1|2|3|5|6|7|8|9])\\d{8}$";
    //验证座机号,正确格式：xxx/xxxx-xxxxxxx/xxxxxxxx
    private static final String REGEX_TEL = "^0\\d{2,3}[- ]?\\d{7,8}";
    //验证邮箱
    private static final String REGEX_EMAIL = "^\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*$";
    //验证url
    private static final String REGEX_URL = "http(s)?://([\\w-]+\\.)+[\\w-]+(/[\\w-./?%&=]*)?";
    //验证汉字
    private static final String REGEX_CHZ = "^[\\u4e00-\\u9fa5]+$";
    //验证用户名,取值范围为a-z,A-Z,0-9,"_",汉字，不能以"_"结尾,用户名必须是6-20位
    private static final String REGEX_USERNAME = "^[\\w\\u4e00-\\u9fa5]{6,20}(?



加解密相关
MD5加密
/**
* MD5加密
*/
public static String encryptMD5(String data) throws Exception {
    MessageDigest md5 = MessageDigest.getInstance("MD5");
    return new BigInteger(md5.digest(data.getBytes())).toString(16);
}
SHA加密
/**
* SHA加密
*/
public static String encryptSHA(String data) throws Exception {
    MessageDigest sha = MessageDigest.getInstance("SHA");
    return new BigInteger(sha.digest(data.getBytes())).toString(32);
}

未归类
获取服务是否开启
/**
* 获取服务是否开启
*/
public static boolean isRunningService(String className, Context context) {
    //进程的管理者,活动的管理者
    ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    //获取正在运行的服务
    List runningServices = activityManager.getRunningServices(1000);//maxNum 返回正在运行的服务的上限个数,最多返回多少个服务
    //遍历集合
    for (RunningServiceInfo runningServiceInfo : runningServices) {
        //获取控件的标示
        ComponentName service = runningServiceInfo.service;
        //获取正在运行的服务的全类名
        String className2 = service.getClassName();
        //将获取到的正在运行的服务的全类名和传递过来的服务的全类名比较,一直表示服务正在运行  返回true,不一致表示服务没有运行  返回false
        if (className.equals(className2)) {
            return true;
        }
    }
    return false;
}

更新Log
2016/07/31 新增点击屏幕空白区域隐藏软键盘
2016/07/31 新增目录跳转功能（然而简书不支持所以这里没更新）
2016/08/01 新增获取当前App版本Code
2016/08/01 新增目录中显示方法名