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