1 /* 2 * Copyright (C) 2014 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.supportv7.graphics; 18 19 import com.example.android.supportv7.R; 20 import android.graphics.Bitmap; 21 import android.net.Uri; 22 import android.os.Bundle; 23 import android.support.v7.app.ActionBarActivity; 24 import android.support.v7.graphics.Palette; 25 import android.view.Menu; 26 import android.view.MenuItem; 27 import android.view.View; 28 import android.view.ViewGroup; 29 import android.widget.AdapterView; 30 import android.widget.BaseAdapter; 31 import android.widget.GridView; 32 import android.widget.ImageView; 33 import android.widget.Toast; 34 35 import java.util.List; 36 37 /** 38 * Activity which displays the more details about a generated {@link Palette} for a specific 39 * {@link android.provider.MediaStore} image. 40 * 41 * Displays the full generated palette of colors in a grid, which allows clicking on an palette item 42 * to display more information in a {@link Toast}. 43 * 44 * Also allows the customization of the number of colors used in the palette generation for 45 * demonstration purposes. 46 */ 47 public class PaletteDetailActivity extends ActionBarActivity { 48 49 private ImageView mImageView; 50 private GridView mGridView; 51 private SwatchesPalette mSwatchesPalette; 52 53 private Uri mImageUri; 54 55 private Toast mCurrentToast; 56 57 @Override 58 protected void onCreate(Bundle savedInstanceState) { 59 super.onCreate(savedInstanceState); 60 setContentView(R.layout.palette_activity_detail); 61 62 mImageUri = getIntent().getData(); 63 64 mImageView = (ImageView) findViewById(R.id.image); 65 mGridView = (GridView) findViewById(R.id.palette); 66 mSwatchesPalette = new SwatchesPalette(); 67 mGridView.setAdapter(mSwatchesPalette); 68 69 // Set an OnItemClickListener to display a information Toast when a Palette item is clicked 70 mGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 71 @Override 72 public void onItemClick(AdapterView<?> adapterView, View view, int pos, long l) { 73 // Cancel the current Toast if there is already one being displayed 74 if (mCurrentToast != null) { 75 mCurrentToast.cancel(); 76 } 77 78 final Palette.Swatch item = (Palette.Swatch) adapterView.getItemAtPosition(pos); 79 mCurrentToast = Toast.makeText(PaletteDetailActivity.this, 80 item.toString(), Toast.LENGTH_LONG); 81 mCurrentToast.show(); 82 } 83 }); 84 85 // Load the image with a default number of colors 86 loadImage(16); 87 } 88 89 @Override 90 public boolean onCreateOptionsMenu(Menu menu) { 91 getMenuInflater().inflate(R.menu.sample_palette_actions, menu); 92 return true; 93 } 94 95 @Override 96 public boolean onOptionsItemSelected(MenuItem item) { 97 switch (item.getItemId()) { 98 case R.id.menu_num_colors_8: 99 loadImage(8); 100 item.setChecked(true); 101 return true; 102 case R.id.menu_num_colors_12: 103 loadImage(12); 104 item.setChecked(true); 105 return true; 106 case R.id.menu_num_colors_16: 107 loadImage(16); 108 item.setChecked(true); 109 return true; 110 case R.id.menu_num_colors_24: 111 loadImage(24); 112 item.setChecked(true); 113 return true; 114 case R.id.menu_num_colors_32: 115 loadImage(32); 116 item.setChecked(true); 117 return true; 118 } 119 return super.onOptionsItemSelected(item); 120 } 121 122 private void loadImage(final int numColors) { 123 final int id = Integer.parseInt(mImageUri.getLastPathSegment()); 124 125 ImageLoader.loadMediaStoreThumbnail(mImageView, id, new ImageLoader.Listener() { 126 @Override 127 public void onImageLoaded(Bitmap bitmap) { 128 Palette.generateAsync(bitmap, numColors, new Palette.PaletteAsyncListener() { 129 @Override 130 public void onGenerated(Palette palette) { 131 populatePalette(palette); 132 } 133 }); 134 } 135 }); 136 } 137 138 private class SwatchesPalette extends BaseAdapter { 139 140 private List<Palette.Swatch> mSwatches; 141 142 @Override 143 public int getCount() { 144 return mSwatches != null ? mSwatches.size() : 0; 145 } 146 147 @Override 148 public Palette.Swatch getItem(int position) { 149 return mSwatches.get(position); 150 } 151 152 @Override 153 public long getItemId(int position) { 154 return position; 155 } 156 157 void setSwatches(List<Palette.Swatch> palette) { 158 mSwatches = palette; 159 notifyDataSetChanged(); 160 } 161 162 @Override 163 public View getView(int position, View view, ViewGroup parent) { 164 if (view == null) { 165 view = getLayoutInflater().inflate(R.layout.palette_grid_item, parent, false); 166 } 167 setBackgroundColor(view, getItem(position)); 168 return view; 169 } 170 } 171 172 private void populatePalette(Palette palette) { 173 mSwatchesPalette.setSwatches(palette.getSwatches()); 174 175 setBackgroundColor(findViewById(R.id.text_vibrant), palette.getVibrantSwatch()); 176 setBackgroundColor(findViewById(R.id.text_muted), palette.getMutedSwatch()); 177 setBackgroundColor(findViewById(R.id.text_light_vibrant), palette.getLightVibrantSwatch()); 178 setBackgroundColor(findViewById(R.id.text_light_muted), palette.getLightMutedSwatch()); 179 setBackgroundColor(findViewById(R.id.text_dark_vibrant), palette.getDarkVibrantSwatch()); 180 setBackgroundColor(findViewById(R.id.text_dark_muted), palette.getDarkMutedSwatch()); 181 } 182 183 private void setBackgroundColor(View view, Palette.Swatch swatch) { 184 if (view != null && swatch != null) { 185 view.setBackgroundColor(swatch.getRgb()); 186 } 187 } 188 189 }
