android 代码片段整理

1.拨打电话

public static void call(Context context, String phoneNumber) {    context.startActivity(new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + phoneNumber)));}

2.跳转至拨号界面

public static void callDial(Context context, String phoneNumber) {    context.startActivity(new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + phoneNumber)));}

3.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);}

4.唤醒屏幕并解锁

public static void wakeUpAndUnlock(Context context){      KeyguardManager km= (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);      KeyguardManager.KeyguardLock kl = km.newKeyguardLock("unLock");      //解锁      kl.disableKeyguard();      //获取电源管理器对象      PowerManager pm=(PowerManager) context.getSystemService(Context.POWER_SERVICE);      //获取PowerManager.WakeLock对象,后面的参数|表示同时传入两个值,最后的是LogCat里用的Tag      PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.SCREEN_DIM_WAKE_LOCK,"bright");      //点亮屏幕      wl.acquire();      //释放      wl.release();  }

5.需要添加权限

6.判断当前App处于前台还是后台状态

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;}

7.需要添加权限

8.判断当前手机是否处于锁屏(睡眠)状态

public static boolean isSleeping(Context context) {    KeyguardManager kgMgr = (KeyguardManager) context            .getSystemService(Context.KEYGUARD_SERVICE);    boolean isSleeping = kgMgr.inKeyguardRestrictedInputMode();    return isSleeping;}

9.判断当前是否有网络连接

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;}

10.判断当前是否是WIFI连接状态

public static boolean isWifiConnected(Context context) {    ConnectivityManager connectivityManager = (ConnectivityManager) context            .getSystemService(Context.CONNECTIVITY_SERVICE);    NetworkInfo wifiNetworkInfo = connectivityManager            .getNetworkInfo(ConnectivityManager.TYPE_WIFI);    if (wifiNetworkInfo.isConnected()) {        return true;    }    return false;}

11.安装APK

public static void installApk(Context context, File file) {    Intent intent = new Intent();    intent.setAction("android.intent.action.VIEW");    intent.addCategory("android.intent.category.DEFAULT");    intent.setType("application/vnd.android.package-archive");    intent.setDataAndType(Uri.fromFile(file),            "application/vnd.android.package-archive");    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);    context.startActivity(intent);}

12.判断当前设备是否为手机

public static boolean isPhone(Context context) {    TelephonyManager telephony = (TelephonyManager) context            .getSystemService(Context.TELEPHONY_SERVICE);    if (telephony.getPhoneType() == TelephonyManager.PHONE_TYPE_NONE) {        return false;    } else {        return true;    }}

13.获取当前设备宽高，单位px

 @SuppressWarnings("deprecation")public static int getDeviceWidth(Context context) {    WindowManager manager = (WindowManager) context            .getSystemService(Context.WINDOW_SERVICE);    return manager.getDefaultDisplay().getWidth();}    @SuppressWarnings("deprecation")public static int getDeviceHeight(Context context) {    WindowManager manager = (WindowManager) context            .getSystemService(Context.WINDOW_SERVICE);    return manager.getDefaultDisplay().getHeight();}

14.获取当前设备的IMEI，需要与上面的isPhone()一起使用

@TargetApi(Build.VERSION_CODES.CUPCAKE)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;}

15.获取当前设备的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;}

16.获取当前程序的版本号

public static String getAppVersion(Context context) {    String version = "0";    try {        version = context.getPackageManager().getPackageInfo(                context.getPackageName(), 0).versionName;    } catch (PackageManager.NameNotFoundException e) {        e.printStackTrace();    }    return version;}

17.收集设备信息，用于信息统计分析

public static Properties collectDeviceInfo(Context context) {    Properties mDeviceCrashInfo = new Properties();    try {        PackageManager pm = context.getPackageManager();        PackageInfo pi = pm.getPackageInfo(context.getPackageName(),                PackageManager.GET_ACTIVITIES);        if (pi != null) {            mDeviceCrashInfo.put(VERSION_NAME,                    pi.versionName == null ? "not set" : pi.versionName);            mDeviceCrashInfo.put(VERSION_CODE, pi.versionCode);        }    } catch (PackageManager.NameNotFoundException e) {        Log.e(TAG, "Error while collect package info", e);    }    Field[] fields = Build.class.getDeclaredFields();    for (Field field : fields) {        try {            field.setAccessible(true);            mDeviceCrashInfo.put(field.getName(), field.get(null));        } catch (Exception e) {            Log.e(TAG, "Error while collect crash info", e);        }    }    return mDeviceCrashInfo;}public static String collectDeviceInfoStr(Context context) {    Properties prop = collectDeviceInfo(context);    Set deviceInfos = prop.keySet();    StringBuilder deviceInfoStr = new StringBuilder("{\n");    for (Iterator iter = deviceInfos.iterator(); iter.hasNext();) {        Object item = iter.next();        deviceInfoStr.append("\t\t\t" + item + ":" + prop.get(item)                + ", \n");    }    deviceInfoStr.append("}");    return deviceInfoStr.toString();}

18.是否有SD卡

public static boolean haveSDCard() {    return android.os.Environment.getExternalStorageState().equals(            android.os.Environment.MEDIA_MOUNTED);}

19.动态隐藏软键盘

@TargetApi(Build.VERSION_CODES.CUPCAKE)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);    }}@TargetApi(Build.VERSION_CODES.CUPCAKE)public static void hideSoftInput(Context context, EditText edit) {    edit.clearFocus();    InputMethodManager inputmanger = (InputMethodManager) context            .getSystemService(Context.INPUT_METHOD_SERVICE);    inputmanger.hideSoftInputFromWindow(edit.getWindowToken(), 0);}

20.动态显示软键盘

@TargetApi(Build.VERSION_CODES.CUPCAKE)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);}

21.动态显示或者是隐藏软键盘

@TargetApi(Build.VERSION_CODES.CUPCAKE)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);}

22.主动回到Home，后台运行

public static void goHome(Context context) {    Intent mHomeIntent = new Intent(Intent.ACTION_MAIN);    mHomeIntent.addCategory(Intent.CATEGORY_HOME);    mHomeIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK            | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);    context.startActivity(mHomeIntent);}

23.获取状态栏高度

注意，要在onWindowFocusChanged中调用，在onCreate中获取高度为0

@TargetApi(Build.VERSION_CODES.CUPCAKE)public static int getStatusBarHeight(Activity activity) {Rect frame = new Rect();activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);    return frame.top;}

24.获取状态栏高度＋标题栏(ActionBar)高度

(注意，如果没有ActionBar，那么获取的高度将和上面的是一样的，只有状态栏的高度)

public static int getTopBarHeight(Activity activity) {    return activity.getWindow().findViewById(Window.ID_ANDROID_CONTENT)            .getTop();}

25.获取MCC+MNC代码 (SIM卡运营商国家代码和运营商网络代码)

仅当用户已在网络注册时有效, CDMA 可能会无效（中国移动：46000 46002, 中国联通：46001,中国电信：46003）

public static String getNetworkOperator(Context context) {    TelephonyManager telephonyManager = (TelephonyManager) context            .getSystemService(Context.TELEPHONY_SERVICE);    return telephonyManager.getNetworkOperator();}

26.返回移动网络运营商的名字

(例：中国联通、中国移动、中国电信) 仅当用户已在网络注册时有效, CDMA 可能会无效)

public static String getNetworkOperatorName(Context context) {    TelephonyManager telephonyManager = (TelephonyManager) context            .getSystemService(Context.TELEPHONY_SERVICE);    return telephonyManager.getNetworkOperatorName();}

27.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

public static int getPhoneType(Context context) {    TelephonyManager telephonyManager = (TelephonyManager) context            .getSystemService(Context.TELEPHONY_SERVICE);    return telephonyManager.getPhoneType();}

28.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;}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;    }}

29.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;}

参考：http://blog.csdn.net/zhaokaiqiang1992/article/details/44724687

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