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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 | public class CommonUtil { public static boolean hasSDCard() { String status = Environment.getExternalStorageState(); return status.equals(Environment.MEDIA_MOUNTED); } /** * 获取最大内存 * * @return */ public static long getMaxMemory() { return Runtime.getRuntime().maxMemory() / 1024 ; } /** * 检查网络 * * @param context * @return */ public static boolean checkNetState(Context context) { boolean netstate = false ; ConnectivityManager connectivity = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); if (connectivity != null ) { NetworkInfo[] info = connectivity.getAllNetworkInfo(); if (info != null ) { for ( int i = 0 ; i < info.length; i++) { if (info[i].getState() == NetworkInfo.State.CONNECTED) { netstate = true ; break ; } } } } return netstate; } public static void showToast(Context context, String tip) { Toast.makeText(context, tip, Toast.LENGTH_SHORT).show(); } public static DisplayMetrics metric = new DisplayMetrics(); /** * 得到屏幕高度 * * @param context * @return */ public static int getScreenHeight(Activity context) { context.getWindowManager().getDefaultDisplay().getMetrics(metric); return metric.heightPixels; } /** * 得到屏幕宽度 * * @param context * @return */ public static int getScreenWidth(Activity context) { context.getWindowManager().getDefaultDisplay().getMetrics(metric); return metric.widthPixels; } /** * 根据手机的分辨率从 dp 的单位 转成为 px(像素) */ public static int dip2px(Context context, float dpValue) { final float scale = context.getResources().getDisplayMetrics().density; return ( int ) (dpValue * scale + 0 .5f); } /** * 根据手机的分辨率从 px(像素) 的单位 转成为 dp */ public static int px2dip(Context context, float pxValue) { final float scale = context.getResources().getDisplayMetrics().density; return ( int ) (pxValue / scale + 0 .5f); } /** * 查询手机内非系统应用 * * @param context * @return */ public static List<PackageInfo> getAllApps(Context context) { List<PackageInfo> apps = new ArrayList<PackageInfo>(); PackageManager pManager = context.getPackageManager(); // 获取手机内所有应用 List<PackageInfo> paklist = pManager.getInstalledPackages( 0 ); for ( int i = 0 ; i < paklist.size(); i++) { PackageInfo pak = (PackageInfo) paklist.get(i); // 判断是否为非系统预装的应用程序 if ((pak.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) <= 0 ) { // customs applications apps.add(pak); } } return apps; } public static Bitmap zoomBitmap(Bitmap bitmap, int width, int height) { int w = bitmap.getWidth(); int h = bitmap.getHeight(); Matrix matrix = new Matrix(); float scaleWidth = (( float ) width / w); float scaleHeight = (( float ) height / h); matrix.postScale(scaleWidth, scaleHeight); Bitmap newbmp = Bitmap.createBitmap(bitmap, 0 , 0 , w, h, matrix, true ); return newbmp; } /** * 获取版本号和版本次数 * * @param context * @return */ public static String getVersionCode(Context context, int type) { try { PackageInfo pi = context.getPackageManager().getPackageInfo( context.getPackageName(), 0 ); if (type == 1 ) { return String.valueOf(pi.versionCode); } else { return pi.versionName; } } catch (NameNotFoundException e) { e.printStackTrace(); return null ; } } // 通过Service的类名来判断是否启动某个服务 public static boolean messageServiceIsStart( List<ActivityManager.RunningServiceInfo> mServiceList, String className) { for ( int i = 0 ; i < mServiceList.size(); i++) { if (className.equals(mServiceList.get(i).service.getClassName())) { return true ; } } return false ; } } |