新手必备的常用 Android 代码片段整理

傻也不懂

于 2016-08-25 16:51:57 发布

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新手必备的常用 Android 代码片段整理

2016-01-20 安卓应用频道

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来源：赵凯强（@裸奔的凯子哥）

链接：http://blog.youkuaiyun.com/zhaokaiqiang1992/article/details/44724057

以下内容来自多个开源项目的整理和自己的项目积累。

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

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

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

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<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;

    }

7.需要添加权限

<uses-permission

android:name="android.permission.GET_TASKS" />

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;

}