1 /* 2 * Copyright (C) 2009 The Android Open Source Project 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.multires; 18 19 import android.app.Activity; 20 import android.os.Bundle; 21 import android.view.View; 22 import android.widget.Button; 23 import android.widget.ImageView; 24 import android.widget.TextView; 25 26 public final class MultiRes extends Activity { 27 28 private int mCurrentPhotoIndex = 0; 29 private int[] mPhotoIds = new int[] { R.drawable.sample_0, 30 R.drawable.sample_1, R.drawable.sample_2, R.drawable.sample_3, 31 R.drawable.sample_4, R.drawable.sample_5, R.drawable.sample_6, 32 R.drawable.sample_7 }; 33 34 /** Called when the activity is first created. */ 35 @Override onCreate(Bundle savedInstanceState)36 public void onCreate(Bundle savedInstanceState) { 37 super.onCreate(savedInstanceState); 38 setContentView(R.layout.main); 39 40 showPhoto(mCurrentPhotoIndex); 41 42 // Handle clicks on the 'Next' button. 43 Button nextButton = (Button) findViewById(R.id.next_button); 44 nextButton.setOnClickListener(new View.OnClickListener() { 45 public void onClick(View v) { 46 mCurrentPhotoIndex = (mCurrentPhotoIndex + 1) 47 % mPhotoIds.length; 48 showPhoto(mCurrentPhotoIndex); 49 } 50 }); 51 } 52 53 @Override onSaveInstanceState(Bundle outState)54 protected void onSaveInstanceState(Bundle outState) { 55 outState.putInt("photo_index", mCurrentPhotoIndex); 56 super.onSaveInstanceState(outState); 57 } 58 59 @Override onRestoreInstanceState(Bundle savedInstanceState)60 protected void onRestoreInstanceState(Bundle savedInstanceState) { 61 mCurrentPhotoIndex = savedInstanceState.getInt("photo_index"); 62 showPhoto(mCurrentPhotoIndex); 63 super.onRestoreInstanceState(savedInstanceState); 64 } 65 showPhoto(int photoIndex)66 private void showPhoto(int photoIndex) { 67 ImageView imageView = (ImageView) findViewById(R.id.image_view); 68 imageView.setImageResource(mPhotoIds[photoIndex]); 69 70 TextView statusText = (TextView) findViewById(R.id.status_text); 71 statusText.setText(String.format("%d/%d", photoIndex + 1, 72 mPhotoIds.length)); 73 } 74 } 75