Java tutorial
/* * Copyright (C) 2016 android@19code.com * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package library.artaris.cn.library.utils; import android.Manifest; import android.annotation.SuppressLint; import android.app.Activity; import android.app.ActivityManager; import android.app.ActivityManager.MemoryInfo; import android.app.ActivityManager.RunningAppProcessInfo; import android.app.ActivityManager.RunningServiceInfo; import android.app.KeyguardManager; import android.content.Context; import android.content.Intent; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; import android.content.pm.PackageManager.NameNotFoundException; import android.content.pm.ResolveInfo; import android.location.LocationManager; import android.net.Uri; import android.os.Build; import android.os.Parcelable; import android.support.v4.app.ActivityCompat; import android.text.TextUtils; import android.view.inputmethod.InputMethodManager; import android.widget.EditText; import java.io.File; import java.security.MessageDigest; import java.util.List; import java.util.Locale; @SuppressLint("SimpleDateFormat") public final class SystemUtils { /** * ?? * @param context * @param smsBody */ public static void sendSMS(Context context, String smsBody) { Uri smsToUri = Uri.parse("smsto:"); Intent intent = new Intent(Intent.ACTION_SENDTO, smsToUri); intent.putExtra("sms_body", smsBody); context.startActivity(intent); } /** * ? * @param activity * @param phoneNumber */ public static void forwardToDial(Activity activity, String phoneNumber) { if (activity != null && !TextUtils.isEmpty(phoneNumber)) { activity.startActivity(new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + phoneNumber))); } } /** * ??? * @param activity * @param phoneNumber */ public static void callPhone(Activity activity, String phoneNumber) { if (activity != null && !TextUtils.isEmpty(phoneNumber)) { if (ActivityCompat.checkSelfPermission(activity, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) { return; } activity.startActivity(new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + phoneNumber))); } } /** * ? * @param mContext * @param mailID */ public static void sendMail(Context mContext, String mailID) { Uri uri = Uri.parse("mailto:" + mailID); mContext.startActivity(new Intent(Intent.ACTION_SENDTO, uri)); } /** * ?? * @param activity */ public static void hideKeyBoard(Activity activity) { ((InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE)).hideSoftInputFromWindow( activity.getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS); } /** * ?????? * @param context * @return */ public static boolean isBackground(Context context) { ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); List<RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses(); for (RunningAppProcessInfo appProcess : appProcesses) { if (appProcess.processName.equals(context.getPackageName())) { return appProcess.importance == RunningAppProcessInfo.IMPORTANCE_BACKGROUND; } } return false; } /** * ??? * @param context * @return */ public static boolean isSleeping(Context context) { KeyguardManager kgMgr = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE); return kgMgr.inKeyguardRestrictedInputMode(); } /** * apk * @param context * @param apkfile */ public static void installApk(Context context, File apkfile) { Intent intent = new Intent(); intent.setAction("android.intent.action.VIEW"); intent.addCategory("android.intent.category.DEFAULT"); intent.setType("application/vnd.android.package-archive"); intent.setData(Uri.fromFile(apkfile)); intent.setDataAndType(Uri.fromFile(apkfile), "application/vnd.android.package-archive"); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(intent); } static final String suSearchPaths[] = { "/system/bin/", "/system/xbin/", "/system/sbin/", "/sbin/", "/vendor/bin/" }; /** * ?root */ public static boolean isRooted() { File file; boolean flag1 = false; for (String suSearchPath : suSearchPaths) { file = new File(suSearchPath + "su"); if (file.isFile() && file.exists()) { flag1 = true; break; } } return flag1; } /** * ?? * @return */ public static boolean isRunningOnEmulator() { return Build.BRAND.contains("generic") || Build.DEVICE.contains("generic") || Build.PRODUCT.contains("sdk") || Build.HARDWARE.contains("goldfish") || Build.MANUFACTURER.contains("Genymotion") || Build.PRODUCT.contains("vbox86p") || Build.DEVICE.contains("vbox86p") || Build.HARDWARE.contains("vbox86"); } /** * ????? * @param context * @return */ public static String getAppVersionName(Context context) { String version = "0"; try { version = context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionName; } catch (NameNotFoundException e) { e.printStackTrace(); } return version; } /** * ???? * @param context * @return */ public static int getAppVersionCode(Context context) { int version = 0; try { version = context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionCode; } catch (NameNotFoundException e) { e.printStackTrace(); } return version; } /** * Home * @param context */ 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); } /** * ??? * @param context * @param pkgName * @return */ public static String getSign(Context context, String pkgName) { try { PackageInfo pis = context.getPackageManager().getPackageInfo(pkgName, PackageManager.GET_SIGNATURES); return hexdigest(pis.signatures[0].toByteArray()); } catch (NameNotFoundException e) { throw new RuntimeException(SystemUtils.class.getName() + "the " + pkgName + "'s application not found"); } } /** * 32??? * @param paramArrayOfByte * @return */ public static String hexdigest(byte[] paramArrayOfByte) { final char[] hexDigits = { 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 97, 98, 99, 100, 101, 102 }; try { MessageDigest localMessageDigest = MessageDigest.getInstance("MD5"); localMessageDigest.update(paramArrayOfByte); byte[] arrayOfByte = localMessageDigest.digest(); char[] arrayOfChar = new char[32]; for (int i = 0, j = 0;; i++, j++) { if (i >= 16) { return new String(arrayOfChar); } int k = arrayOfByte[i]; arrayOfChar[j] = hexDigits[(0xF & k >>> 4)]; arrayOfChar[++j] = hexDigits[(k & 0xF)]; } } catch (Exception e) { e.printStackTrace(); } return ""; } /** * ?? * @param context * @return */ public static int getDeviceUsableMemory(Context context) { ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); MemoryInfo mi = new MemoryInfo(); am.getMemoryInfo(mi); return (int) (mi.availMem / (1024 * 1024)); } /** * ???? * @param context * @return */ public static int gc(Context context) { //long i = getDeviceUsableMemory(context); int count = 0; ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); List<RunningServiceInfo> serviceList = am.getRunningServices(100); if (serviceList != null) for (RunningServiceInfo service : serviceList) { if (service.pid == android.os.Process.myPid()) continue; try { android.os.Process.killProcess(service.pid); count++; } catch (Exception e) { e.getStackTrace(); continue; } } List<RunningAppProcessInfo> processList = am.getRunningAppProcesses(); if (processList != null) for (RunningAppProcessInfo process : processList) { if (process.importance > RunningAppProcessInfo.IMPORTANCE_VISIBLE) { String[] pkgList = process.pkgList; for (String pkgName : pkgList) { try { am.killBackgroundProcesses(pkgName); count++; } catch (Exception e) { e.getStackTrace(); continue; } } } } return count; } /** * ??? * @param context * @param shortCutName * @param icon * @param cls */ public static void createDeskShortCut(Context context, String shortCutName, int icon, Class<?> cls) { Intent shortcutIntent = new Intent("com.android.launcher.action.INSTALL_SHORTCUT"); shortcutIntent.putExtra("duplicate", false); shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME, shortCutName); Parcelable ico = Intent.ShortcutIconResource.fromContext(context.getApplicationContext(), icon); shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, ico); Intent intent = new Intent(context, cls); intent.setAction("android.intent.action.MAIN"); intent.addCategory("android.intent.category.LAUNCHER"); shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, intent); context.sendBroadcast(shortcutIntent); } /** * ?? * @param context * @param shortCutName * @param iconId * @param presentIntent */ public static void createShortcut(Context context, String shortCutName, int iconId, Intent presentIntent) { Intent shortcutIntent = new Intent("com.android.launcher.action.INSTALL_SHORTCUT"); shortcutIntent.putExtra("duplicate", false); shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME, shortCutName); shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, Intent.ShortcutIconResource.fromContext(context, iconId)); shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, presentIntent); context.sendBroadcast(shortcutIntent); } /** * * @param context * @param title * @param text */ public static void shareText(Context context, String title, String text) { Intent intent = new Intent(Intent.ACTION_SEND); intent.setType("text/plain"); //intent.putExtra(Intent.EXTRA_SUBJECT, title); intent.putExtra(Intent.EXTRA_TEXT, text); context.startActivity(Intent.createChooser(intent, title)); /* List<ResolveInfo> ris = getShareTargets(context); if (ris != null && ris.size() > 0) { context.startActivity(Intent.createChooser(intent, title)); }*/ } /** * (FileUtils.shareFile?) * @param context * @param title * @param filePath */ public static void shareFile(Context context, String title, String filePath) { FileUtils.shareFile(context, title, filePath); } /** * ??? * @param context * @return */ public static List<ResolveInfo> getShareTargets(Context context) { Intent intent = new Intent(Intent.ACTION_SEND, null); intent.addCategory(Intent.CATEGORY_DEFAULT); intent.setType("text/plain"); PackageManager pm = context.getPackageManager(); return pm.queryIntentActivities(intent, PackageManager.COMPONENT_ENABLED_STATE_DEFAULT); } /** * ?? * @return */ public static String getCurrentLanguage() { return Locale.getDefault().getLanguage(); } /** * ?? * @param context * @return */ public static String getLanguage(Context context) { if (context != null) { return context.getResources().getConfiguration().locale.getLanguage(); } return null; } /** * GPS? * <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> */ public static boolean isGpsEnabled(Context context) { LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE); // GPS????24???? boolean gps = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); // WLAN(3G/2G)?AGPSGPS???? boolean network = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER); return gps || network; } /** * * @param context * @param editText */ public static void showSoftInputMethod(Context context, EditText editText) { if (context != null && editText != null) { editText.requestFocus(); InputMethodManager inputManager = (InputMethodManager) context .getSystemService(Context.INPUT_METHOD_SERVICE); inputManager.showSoftInput(editText, 0); } } /** * * @param context * @param editText */ public static void closeSoftInputMethod(Context context, EditText editText) { if (context != null && editText != null) { InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE); if (imm != null) { imm.hideSoftInputFromWindow(editText.getWindowToken(), 0); } } } /** * * @param context */ public static void showSoftInput(Context context) { InputMethodManager inputMethodManager = (InputMethodManager) context .getSystemService(Context.INPUT_METHOD_SERVICE); inputMethodManager.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS); } /** * * @param context */ public static void closeSoftInput(Context context) { InputMethodManager inputMethodManager = (InputMethodManager) context .getSystemService(Context.INPUT_METHOD_SERVICE); if (inputMethodManager != null && ((Activity) context).getCurrentFocus() != null) { inputMethodManager.hideSoftInputFromWindow(((Activity) context).getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS); } } }