常用 Android 代码片段

拨打电话

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

View Code

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)));
    }

View Code

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);
    }

View Code

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();  
    }

View Code

需要添加权限

<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.DISABLE_KEYGUARD" />

View Code

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<ActivityManager.RunningTaskInfo> tasks = am.getRunningTasks(1);
        if (!tasks.isEmpty()) {
            ComponentName topActivity = tasks.get(0).topActivity;
            if (!topActivity.getPackageName().equals(context.getPackageName())) {
                return true;
            }
        }
        return false;
    }

View Code

需要添加权限

<uses-permission
     android:name="android.permission.GET_TASKS" />

View Code

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;
    }

View Code

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;
    }

View Code

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;
    }

View Code

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);
    }

View Code

判断当前设备是否为手机

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

View Code

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();
    }

View Code

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;
    }

View Code

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;
    }

View Code

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;
    }

View Code

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();
    }

View Code

是否有SD卡

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

View Code

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);
    }

View Code

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);
    }

View Code

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);
    }

View Code

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);
    }

View Code

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;
    }

View Code

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();
    }

View Code

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();
    }

View Code

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();
    }

View Code

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();
    }

View Code

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;
        }
    }

View Code

判断当前手机的网络类型(WIFI还是2,3,4G)

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;
    }

View Code

引用：http://android.jobbole.com/82387/

posted @ 2016-01-22 15:03 EnderZhou 阅读(228) 评论(0) 编辑收藏举报

会员力量，点亮园子希望

刷新页面返回顶部

EnderZhou

常用 Android 代码片段

公告