1 /* 2 * Copyright (C) 2013 Google Inc. All Rights Reserved. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.example.android.leanback; 18 19 import android.app.AlertDialog; 20 import android.content.Context; 21 import android.content.DialogInterface; 22 import android.graphics.Point; 23 import android.view.Display; 24 import android.view.WindowManager; 25 import android.widget.Toast; 26 27 /** 28 * A collection of utility methods, all static. 29 */ 30 public class Utils { 31 32 /* 33 * Making sure public utility methods remain static 34 */ Utils()35 private Utils() { 36 } 37 38 /** 39 * Returns the screen/display size 40 * 41 * @param context 42 * @return 43 */ getDisplaySize(Context context)44 public static Point getDisplaySize(Context context) { 45 WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); 46 Display display = wm.getDefaultDisplay(); 47 Point size = new Point(); 48 display.getSize(size); 49 int width = size.x; 50 int height = size.y; 51 return new Point(width, height); 52 } 53 54 /** 55 * Shows an error dialog with a given text message. 56 * 57 * @param context 58 * @param errorString 59 */ 60 showErrorDialog(Context context, String errorString)61 public static final void showErrorDialog(Context context, String errorString) { 62 new AlertDialog.Builder(context).setTitle(R.string.error) 63 .setMessage(errorString) 64 .setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() { 65 @Override 66 public void onClick(DialogInterface dialog, int id) { 67 dialog.cancel(); 68 } 69 }) 70 .create() 71 .show(); 72 } 73 74 /** 75 * Shows a (long) toast 76 * 77 * @param context 78 * @param msg 79 */ showToast(Context context, String msg)80 public static void showToast(Context context, String msg) { 81 Toast.makeText(context, msg, Toast.LENGTH_LONG).show(); 82 } 83 84 /** 85 * Shows a (long) toast. 86 * 87 * @param context 88 * @param resourceId 89 */ showToast(Context context, int resourceId)90 public static void showToast(Context context, int resourceId) { 91 Toast.makeText(context, context.getString(resourceId), Toast.LENGTH_LONG).show(); 92 } 93 dpToPx(int dp, Context ctx)94 public static int dpToPx(int dp, Context ctx) { 95 float density = ctx.getResources().getDisplayMetrics().density; 96 return Math.round((float) dp * density); 97 } 98 } 99