首先抱歉我的英语不好，我正在开发图像分割器应用程序并且已经完成，但现在的要求是当图像分割(分成几 block /chunks) 那么图像 block 的每一 block (chunk)都是50*50或40*40，最重要的是例如原始图像大小是420*320(它是动态的，我从图库中获取图像)，然后将图像分割(划分)成 block ( block )后，图像大小仍与我上面提到的 420*320 相同，例如图像大小为 420* 320 和分割图像并将每个 block 大小划分为 50*50 后，剩余的 20 大小将分配给最后一个或任何 block ，所以我有 2 个问题:
注意:在我的应用程序中，我将图像放入图库中，然后分割图像并洗牌图像 fragment ( block )，然后合并图像，并创建一个** Canvas 用于绘制所有这些小( block )图像。**
- 分割420*320尺寸的图像后，需要图像 block (chunk)尺寸为50*50或40*40。
- 剩余的20*20 block ( block )分配给最后一个 block 或任何其他 block 。
这是分割前的原图，尺寸为420*320:
这是分割后的图像，整体图像尺寸相同420*320，但图像 block 大小为84*64，我想要 block 大小为50*50或40*40，整体图像尺寸也将是相同的420*320，剩余尺寸将分配给最后一个 block 。
这是我的 Activity :
package com.example.imagesplitter;
import java.io.ByteArrayOutputStream;
import java.util.ArrayList;
import java.util.Collections;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.ImageView;
//public class ImageActivity extends Activity implements OnClickListener {
public class ImageActivity extends Activity {
Button split_image;
Button btnGallery;
ImageView image;
Uri selectedImage;
private final int RESULT_LOAD_IMAGE = 1;
int chunkNumbers = 25;
ArrayList<Bitmap> chunkedImages;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
image = (ImageView) findViewById(R.id.source_image);
alertDialogForCameraImage();
}
void pickImageFromGallery() {
Intent pickPhoto = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
// startActivityForResult(pickPhoto , 0);
startActivityForResult(pickPhoto, RESULT_LOAD_IMAGE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch(requestCode){
case RESULT_LOAD_IMAGE:
if(resultCode==Activity.RESULT_OK) {
// takenPictureData = handleResultFromChooser(data);
selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
// ImageView imageView = (ImageView) findViewById(R.id.imgView);
image.setImageBitmap(BitmapFactory.decodeFile(picturePath));
// Function of split the image(divide the image into pieces)
splitImage(image, chunkNumbers);
}
break;
}
//And show the result in the image view when take picture from camera.
}
public void alertDialogForCameraImage() {
AlertDialog.Builder adb = new AlertDialog.Builder(ImageActivity.this);
adb.setTitle("Pick Image From Gallery: ");
adb.setNegativeButton("Gallery", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
pickImageFromGallery();
} });
adb.show();
}
/**
* Splits the source image and show them all into a grid in a new activity
*
* @param image The source image to split
* @param chunkNumbers The target number of small image chunks to be formed from the source image
*/
private void splitImage(ImageView image, int chunkNumbers) {
//For the number of rows and columns of the grid to be displayed
int rows,cols;
//For height and width of the small image chunks
int chunkHeight,chunkWidth;
//To store all the small image chunks in bitmap format in this list
chunkedImages = new ArrayList<Bitmap>(chunkNumbers);
//Getting the scaled bitmap of the source image
BitmapDrawable drawable = (BitmapDrawable) image.getDrawable();
Bitmap bitmap = drawable.getBitmap();
/*ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);*/
Bitmap scaledBitmap = Bitmap.createScaledBitmap(bitmap, bitmap.getWidth(), bitmap.getHeight(), true);
rows = cols = (int) Math.sqrt(chunkNumbers);
chunkHeight = bitmap.getHeight()/rows;
chunkWidth = bitmap.getWidth()/cols;
/*chunkHeight = 300/rows;
chunkWidth = 300/cols;*/
//xCoord and yCoord are the pixel positions of the image chunks
int yCoord = 0;
for(int x=0; x<rows; x++){
int xCoord = 0;
for(int y=0; y<cols; y++){
chunkedImages.add(Bitmap.createBitmap(scaledBitmap, xCoord, yCoord, chunkWidth, chunkHeight));
xCoord += chunkWidth;
}
yCoord += chunkHeight;
}
// Function of merge the chunks images(after image divided in pieces then i can call this function to combine and merge the image as one)
mergeImage(chunkedImages);
}
void mergeImage(ArrayList<Bitmap> imageChunks) {
Collections.shuffle(imageChunks);
//Get the width and height of the smaller chunks
int chunkWidth = imageChunks.get(0).getWidth();
int chunkHeight = imageChunks.get(0).getHeight();
//create a bitmap of a size which can hold the complete image after merging
Bitmap bitmap = Bitmap.createBitmap(chunkWidth * 5, chunkHeight * 5, Bitmap.Config.ARGB_4444);
//create a canvas for drawing all those small images
Canvas canvas = new Canvas(bitmap);
int count = 0;
for(int rows = 0; rows < 5; rows++){
for(int cols = 0; cols < 5; cols++){
canvas.drawBitmap(imageChunks.get(count), chunkWidth * cols, chunkHeight * rows, null);
count++;
}
}
/*
* The result image is shown in a new Activity
*/
Intent intent = new Intent(ImageActivity.this, MergedImage.class);
intent.putExtra("merged_image", bitmap);
startActivity(intent);
finish();
}
}
这是我的图像分割方法:
private void splitImage(ImageView image, int chunkNumbers) {
//For the number of rows and columns of the grid to be displayed
int rows,cols;
//For height and width of the small image chunks
int chunkHeight,chunkWidth;
//To store all the small image chunks in bitmap format in this list
chunkedImages = new ArrayList<Bitmap>(chunkNumbers);
//Getting the scaled bitmap of the source image
BitmapDrawable drawable = (BitmapDrawable) image.getDrawable();
Bitmap bitmap = drawable.getBitmap();
/*ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);*/
Bitmap scaledBitmap = Bitmap.createScaledBitmap(bitmap, bitmap.getWidth(), bitmap.getHeight(), true);
rows = cols = (int) Math.sqrt(chunkNumbers);
chunkHeight = bitmap.getHeight()/rows;
chunkWidth = bitmap.getWidth()/cols;
/*chunkHeight = 300/rows;
chunkWidth = 300/cols;*/
//xCoord and yCoord are the pixel positions of the image chunks
int yCoord = 0;
for(int x=0; x<rows; x++){
int xCoord = 0;
for(int y=0; y<cols; y++){
chunkedImages.add(Bitmap.createBitmap(scaledBitmap, xCoord, yCoord, chunkWidth, chunkHeight));
xCoord += chunkWidth;
}
yCoord += chunkHeight;
}
mergeImage(chunkedImages);
}
任何帮助将不胜感激，非常感谢。
编辑:
更新: 这是示例图像，我想要这样的:
更新: 我认为应该是这样的:
最佳答案
据我了解该任务，如果原始图像大小为 420x320 并且 block 大小为 50x50，我们将有 7x5 50x50 block 、5 70x50 block (最后一列)、7 50x70 block (最后一行)和一个 70x70 block (右下角)。 然后在洗牌之后我们需要将它们放在一起。然而，如果我们只是随机合并 block ( picture 上的红叉)，最有可能会发生冲突。
因此，在这种情况下，我随机确定大方形 block (70x70) 的位置 (X,Y)，并将所有 70x50 block 放入 X 列，将所有 50x70 block 放入 Y 行。
可能还有其他一些情况:
- 如果原始图像大小为 200x180，那么我们将有 4x2 50x50 block 和 4 50x80 block 。然后我们对其进行洗牌，并应将一个较高的 block 放入一列以保留原始图像大小；
- 如果原始图像是 230x200，那么我们将有 3x4 50x50 block 和 4 80x50 block 。然后我们应该将一个更宽的 block 放入一行；
- 如果原始图像是 200x200，那么您的代码可以完美运行。
由于我们有不同大小的 block ，合并变得更加复杂 - 我们根据之前的 block 大小确定每个 block 的坐标。
package com.example.imagesplitter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Random;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Point;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.Window;
import android.widget.Button;
import android.widget.ImageView;
public class MainActivity extends Activity {
Button split_image;
Button btnGallery;
ImageView sourceImage;
Uri selectedImage;
private final int RESULT_LOAD_IMAGE = 1;
int chunkSideLength = 50;
ArrayList<Bitmap> chunkedImage;
// Number of rows and columns in chunked image
int rows, cols;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
sourceImage = (ImageView) findViewById(R.id.source_image);
alertDialogForCameraImage();
}
void pickImageFromGallery() {
Intent pickPhoto = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
// startActivityForResult(pickPhoto , 0);
startActivityForResult(pickPhoto, RESULT_LOAD_IMAGE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case RESULT_LOAD_IMAGE:
if (resultCode == Activity.RESULT_OK) {
// takenPictureData = handleResultFromChooser(data);
selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null,
null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
// ImageView imageView = (ImageView) findViewById(R.id.imgView);
sourceImage.setImageBitmap(BitmapFactory.decodeFile(picturePath));
// Function of split the image(divide the image into pieces)
splitImage(sourceImage, chunkSideLength);
}
break;
}
// And show the result in the image view when take picture from camera.
}
public void alertDialogForCameraImage() {
AlertDialog.Builder adb = new AlertDialog.Builder(MainActivity.this);
adb.setTitle("Pick Image From Gallery: ");
adb.setNegativeButton("Gallery", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
pickImageFromGallery();
}
});
adb.show();
}
/**
* Splits the source image and show them all into a grid in a new activity
*
* @param image
* The source image to split
* @param chunkSideLength
* Image parts side length
*/
private void splitImage(ImageView image, int chunkSideLength) {
Random random = new Random(System.currentTimeMillis());
// height and weight of higher|wider chunks if they would be
int higherChunkSide, widerChunkSide;
// Getting the scaled bitmap of the source image
Bitmap bitmap = ((BitmapDrawable) image.getDrawable()).getBitmap();
rows = bitmap.getHeight() / chunkSideLength;
higherChunkSide = bitmap.getHeight() % chunkSideLength + chunkSideLength;
cols = bitmap.getWidth() / chunkSideLength;
widerChunkSide = bitmap.getWidth() % chunkSideLength + chunkSideLength;
// To store all the small image chunks in bitmap format in this list
chunkedImage = new ArrayList<Bitmap>(rows * cols);
if (higherChunkSide != chunkSideLength) {
if (widerChunkSide != chunkSideLength) {
// picture has both higher and wider chunks plus one big square chunk
ArrayList<Bitmap> widerChunks = new ArrayList<Bitmap>(rows - 1);
ArrayList<Bitmap> higherChunks = new ArrayList<Bitmap>(cols - 1);
Bitmap squareChunk;
int yCoord = 0;
for (int y = 0; y < rows - 1; ++y) {
int xCoord = 0;
for (int x = 0; x < cols - 1; ++x) {
chunkedImage.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, chunkSideLength, chunkSideLength));
xCoord += chunkSideLength;
}
// add last chunk in a row to array of wider chunks
widerChunks.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, widerChunkSide, chunkSideLength));
yCoord += chunkSideLength;
}
// add last row to array of higher chunks
int xCoord = 0;
for (int x = 0; x < cols - 1; ++x) {
higherChunks.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, chunkSideLength, higherChunkSide));
xCoord += chunkSideLength;
}
//save bottom-right big square chunk
squareChunk = Bitmap.createBitmap(bitmap, xCoord, yCoord, widerChunkSide, higherChunkSide);
//shuffle arrays
Collections.shuffle(chunkedImage);
Collections.shuffle(higherChunks);
Collections.shuffle(widerChunks);
//determine random position of big square chunk
int bigChunkX = random.nextInt(cols);
int bigChunkY = random.nextInt(rows);
//add wider and higher chunks into resulting array of chunks
//all wider(higher) chunks should be in one column(row) to avoid collisions between chunks
//We must insert it row by row because they will displace each other from their columns otherwise
for (int y = 0; y < rows - 1; ++y) {
chunkedImage.add(cols * y + bigChunkX, widerChunks.get(y));
}
//And then we insert the whole row of higher chunks
for (int x = 0; x < cols - 1; ++x) {
chunkedImage.add(bigChunkY * cols + x, higherChunks.get(x));
}
chunkedImage.add(bigChunkY * cols + bigChunkX, squareChunk);
} else {
// picture has only number of higher chunks
ArrayList<Bitmap> higherChunks = new ArrayList<Bitmap>(cols);
int yCoord = 0;
for (int y = 0; y < rows - 1; ++y) {
int xCoord = 0;
for (int x = 0; x < cols; ++x) {
chunkedImage.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, chunkSideLength, chunkSideLength));
xCoord += chunkSideLength;
}
yCoord += chunkSideLength;
}
// add last row to array of higher chunks
int xCoord = 0;
for (int x = 0; x < cols; ++x) {
higherChunks.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, chunkSideLength, higherChunkSide));
xCoord += chunkSideLength;
}
//shuffle arrays
Collections.shuffle(chunkedImage);
Collections.shuffle(higherChunks);
//add higher chunks into resulting array of chunks
//Each higher chunk should be in his own column to preserve original image size
//We must insert it row by row because they will displace each other from their columns otherwise
List<Point> higherChunksPositions = new ArrayList<Point>(cols);
for (int x = 0; x < cols; ++x) {
higherChunksPositions.add(new Point(x, random.nextInt(rows)));
}
//sort positions of higher chunks. THe upper-left elements should be first
Collections.sort(higherChunksPositions, new Comparator<Point>() {
@Override
public int compare(Point lhs, Point rhs) {
if (lhs.y != rhs.y) {
return lhs.y < rhs.y ? -1 : 1;
} else if (lhs.x != rhs.x) {
return lhs.x < rhs.x ? -1 : 1;
}
return 0;
}
});
for (int x = 0; x < cols; ++x) {
Point currentCoord = higherChunksPositions.get(x);
chunkedImage.add(currentCoord.y * cols + currentCoord.x, higherChunks.get(x));
}
}
} else {
if (widerChunkSide != chunkSideLength) {
// picture has only number of wider chunks
ArrayList<Bitmap> widerChunks = new ArrayList<Bitmap>(rows);
int yCoord = 0;
for (int y = 0; y < rows; ++y) {
int xCoord = 0;
for (int x = 0; x < cols - 1; ++x) {
chunkedImage.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, chunkSideLength, chunkSideLength));
xCoord += chunkSideLength;
}
// add last chunk in a row to array of wider chunks
widerChunks.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, widerChunkSide, chunkSideLength));
yCoord += chunkSideLength;
}
//shuffle arrays
Collections.shuffle(chunkedImage);
Collections.shuffle(widerChunks);
//add wider chunks into resulting array of chunks
//Each wider chunk should be in his own row to preserve original image size
for (int y = 0; y < rows; ++y) {
chunkedImage.add(cols * y + random.nextInt(cols), widerChunks.get(y));
}
} else {
// picture perfectly splits into square chunks
int yCoord = 0;
for (int y = 0; y < rows; ++y) {
int xCoord = 0;
for (int x = 0; x < cols; ++x) {
chunkedImage.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, chunkSideLength, chunkSideLength));
xCoord += chunkSideLength;
}
yCoord += chunkSideLength;
}
Collections.shuffle(chunkedImage);
}
}
// Function of merge the chunks images(after image divided in pieces then i can call this function to combine
// and merge the image as one)
mergeImage(chunkedImage, bitmap.getWidth(), bitmap.getHeight());
}
void mergeImage(ArrayList<Bitmap> imageChunks, int width, int height) {
// create a bitmap of a size which can hold the complete image after merging
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_4444);
// create a canvas for drawing all those small images
Canvas canvas = new Canvas(bitmap);
int count = 0;
Bitmap currentChunk = imageChunks.get(0);
//Array of previous row chunks bottom y coordinates
int[] yCoordinates = new int[cols];
Arrays.fill(yCoordinates, 0);
for (int y = 0; y < rows; ++y) {
int xCoord = 0;
for (int x = 0; x < cols; ++x) {
currentChunk = imageChunks.get(count);
canvas.drawBitmap(currentChunk, xCoord, yCoordinates[x], null);
xCoord += currentChunk.getWidth();
yCoordinates[x] += currentChunk.getHeight();
count++;
}
}
/*
* The result image is shown in a new Activity
*/
Intent intent = new Intent(MainActivity.this, MergedImage.class);
intent.putExtra("merged_image", bitmap);
startActivity(intent);
finish();
}
}
抱歉我的英语不好:)
编辑:
如果你想得到原始图像，你需要注释掉所有的洗牌，并将大方 block 放在原来的位置:右下角
//shuffle arrays
/* Collections.shuffle(chunkedImage);
Collections.shuffle(higherChunks);
Collections.shuffle(widerChunks);
*/
//determine random position of big square chunk
int bigChunkX = cols - 1;
int bigChunkY = rows - 1;
只有当图像宽度和高度都不能被 chunkSideLength 整除时，这才是正确的。 在其他情况下，您还应该注释改组并将更高/更宽的 block 放在原来的位置。禁用改组的 splitImage 函数的完整代码如下
private void splitImage(ImageView image, int chunkSideLength) {
Random random = new Random(System.currentTimeMillis());
// height and weight of higher|wider chunks if they would be
int higherChunkSide, widerChunkSide;
// Getting the scaled bitmap of the source image
Bitmap bitmap = ((BitmapDrawable) image.getDrawable()).getBitmap();
rows = bitmap.getHeight() / chunkSideLength;
higherChunkSide = bitmap.getHeight() % chunkSideLength + chunkSideLength;
cols = bitmap.getWidth() / chunkSideLength;
widerChunkSide = bitmap.getWidth() % chunkSideLength + chunkSideLength;
// To store all the small image chunks in bitmap format in this list
chunkedImage = new ArrayList<Bitmap>(rows * cols);
if (higherChunkSide != chunkSideLength) {
if (widerChunkSide != chunkSideLength) {
// picture has both higher and wider chunks plus one big square chunk
ArrayList<Bitmap> widerChunks = new ArrayList<Bitmap>(rows - 1);
ArrayList<Bitmap> higherChunks = new ArrayList<Bitmap>(cols - 1);
Bitmap squareChunk;
int yCoord = 0;
for (int y = 0; y < rows - 1; ++y) {
int xCoord = 0;
for (int x = 0; x < cols - 1; ++x) {
chunkedImage.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, chunkSideLength, chunkSideLength));
xCoord += chunkSideLength;
}
// add last chunk in a row to array of wider chunks
widerChunks.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, widerChunkSide, chunkSideLength));
yCoord += chunkSideLength;
}
// add last row to array of higher chunks
int xCoord = 0;
for (int x = 0; x < cols - 1; ++x) {
higherChunks.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, chunkSideLength, higherChunkSide));
xCoord += chunkSideLength;
}
//save bottom-right big square chunk
squareChunk = Bitmap.createBitmap(bitmap, xCoord, yCoord, widerChunkSide, higherChunkSide);
//shuffle arrays
/* Collections.shuffle(chunkedImage);
Collections.shuffle(higherChunks);
Collections.shuffle(widerChunks);
*/
//determine random position of big square chunk
int bigChunkX = cols - 1;
int bigChunkY = rows - 1;
//add wider and higher chunks into resulting array of chunks
//all wider(higher) chunks should be in one column(row) to avoid collisions between chunks
//We must insert it row by row because they will displace each other from their columns otherwise
for (int y = 0; y < rows - 1; ++y) {
chunkedImage.add(cols * y + bigChunkX, widerChunks.get(y));
}
//And then we insert the whole row of higher chunks
for (int x = 0; x < cols - 1; ++x) {
chunkedImage.add(bigChunkY * cols + x, higherChunks.get(x));
}
chunkedImage.add(bigChunkY * cols + bigChunkX, squareChunk);
} else {
// picture has only number of higher chunks
ArrayList<Bitmap> higherChunks = new ArrayList<Bitmap>(cols);
int yCoord = 0;
for (int y = 0; y < rows - 1; ++y) {
int xCoord = 0;
for (int x = 0; x < cols; ++x) {
chunkedImage.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, chunkSideLength, chunkSideLength));
xCoord += chunkSideLength;
}
yCoord += chunkSideLength;
}
// add last row to array of higher chunks
int xCoord = 0;
for (int x = 0; x < cols; ++x) {
higherChunks.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, chunkSideLength, higherChunkSide));
xCoord += chunkSideLength;
}
//shuffle arrays
/* Collections.shuffle(chunkedImage);
Collections.shuffle(higherChunks);
*/
//add higher chunks into resulting array of chunks
//Each higher chunk should be in his own column to preserve original image size
//We must insert it row by row because they will displace each other from their columns otherwise
List<Point> higherChunksPositions = new ArrayList<Point>(cols);
for (int x = 0; x < cols; ++x) {
higherChunksPositions.add(new Point(x, rows - 1));
}
//sort positions of higher chunks. THe upper-left elements should be first
Collections.sort(higherChunksPositions, new Comparator<Point>() {
@Override
public int compare(Point lhs, Point rhs) {
if (lhs.y != rhs.y) {
return lhs.y < rhs.y ? -1 : 1;
} else if (lhs.x != rhs.x) {
return lhs.x < rhs.x ? -1 : 1;
}
return 0;
}
});
for (int x = 0; x < cols; ++x) {
Point currentCoord = higherChunksPositions.get(x);
chunkedImage.add(currentCoord.y * cols + currentCoord.x, higherChunks.get(x));
}
}
} else {
if (widerChunkSide != chunkSideLength) {
// picture has only number of wider chunks
ArrayList<Bitmap> widerChunks = new ArrayList<Bitmap>(rows);
int yCoord = 0;
for (int y = 0; y < rows; ++y) {
int xCoord = 0;
for (int x = 0; x < cols - 1; ++x) {
chunkedImage.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, chunkSideLength, chunkSideLength));
xCoord += chunkSideLength;
}
// add last chunk in a row to array of wider chunks
widerChunks.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, widerChunkSide, chunkSideLength));
yCoord += chunkSideLength;
}
//shuffle arrays
/* Collections.shuffle(chunkedImage);
Collections.shuffle(widerChunks);
*/
//add wider chunks into resulting array of chunks
//Each wider chunk should be in his own row to preserve original image size
for (int y = 0; y < rows; ++y) {
chunkedImage.add(cols * y + cols - 1, widerChunks.get(y));
}
} else {
// picture perfectly splits into square chunks
int yCoord = 0;
for (int y = 0; y < rows; ++y) {
int xCoord = 0;
for (int x = 0; x < cols; ++x) {
chunkedImage.add(Bitmap.createBitmap(bitmap, xCoord, yCoord, chunkSideLength, chunkSideLength));
xCoord += chunkSideLength;
}
yCoord += chunkSideLength;
}
/* Collections.shuffle(chunkedImage);
*/ }
}
// Function of merge the chunks images(after image divided in pieces then i can call this function to combine
// and merge the image as one)
mergeImage(chunkedImage, bitmap.getWidth(), bitmap.getHeight());
}
关于Android 将图像分成几 block 并获得等效大小的图像 block ( block )，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24115066/