bitmap转换与处理相关工具类,Bitmap与DrawAble与byte[]与InputStream之间的转换

最新推荐文章于 2024-08-11 14:02:57 发布
转载 最新推荐文章于 2024-08-11 14:02:57 发布 · 452 阅读 · 1
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#bitmap转换 #bitmap相关工具类 #Bitmap与DrawAble与byte

1.将view转为bitmap

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// 将view转为bitmap
public static Bitmap getBitmapFromView(View view)
{
    // Define a bitmap with the same size as the view
    Bitmap returnedBitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
    // Bind a canvas to it
    Canvas canvas = new Canvas(returnedBitmap);
    // Get the view's background
    Drawable bgDrawable = view.getBackground();
    if (bgDrawable != null)
        // has background drawable, then draw it on the canvas
        bgDrawable.draw(canvas);
    else
        // does not have background drawable, then draw white background on
        // the canvas
        canvas.drawColor(Color.WHITE);
    // draw the view on the canvas
    view.draw(canvas);
    // return the bitmap
    return returnedBitmap;
}


2.将view转为bitmap

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// 将view转为bitmap
public static Bitmap viewToBitmap(View view)
{
    view.setDrawingCacheEnabled(true);
    view.buildDrawingCache();
    Bitmap bm = view.getDrawingCache();
    return bm;
}


3.将xml转为bitmap

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// 将xml转为bitmap
public static Bitmap convertBitmapFromXML(Context context, String clusterSize, Bitmap bm)
{
                                                                                                                                                                                                                                                                                                                                                                                        
    View layout = LayoutInflater.from(context).inflate(R.layout.estatecartlist_item, null);
    View bitmapView = layout.findViewById(R.id.estatecartlist_item_bitmap);
    TextView xml_text = (TextView) layout.findViewById(R.id.item_estatecart_tv_name);
    ImageView image = (ImageView) layout.findViewById(R.id.item_estatecart_iv_main);
    image.setImageBitmap(bm);
    xml_text.setText(clusterSize);
                                                                                                                                                                                                                                                                                                                                                                                        
    bitmapView.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
                                                                                                                                                                                                                                                                                                                                                                                        
    bitmapView.layout(0, 0, bitmapView.getMeasuredWidth(), bitmapView.getMeasuredHeight());
                                                                                                                                                                                                                                                                                                                                                                                        
    final Bitmap clusterBitmap = Bitmap.createBitmap(bitmapView.getMeasuredWidth(), bitmapView.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
                                                                                                                                                                                                                                                                                                                                                                                        
    Canvas canvas = new Canvas(clusterBitmap);
    bitmapView.draw(canvas);
    return clusterBitmap;
}


==============参考资料===================

* 1.http://stackoverflow.com/questions/7200535/how-to-convert-views-to-bitmap

* 2.http://stackoverflow.com/questions/5536066/convert-view-to-bitmap-on-android/9595919#9595919

* 3.http://stackoverflow.com/questions/12402392/android-converting-xml-view-to-bitmap-without-showing-it


4.图片缩放与压缩

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// 按大小缩放
private Bitmap getimage(String srcPath)
{
    BitmapFactory.Options newOpts = new BitmapFactory.Options();
    // 开始读入图片，此时把options.inJustDecodeBounds 设回true了
    newOpts.inJustDecodeBounds = true;
    Bitmap bitmap = BitmapFactory.decodeFile(srcPath, newOpts);// 此时返回bm为空
                                                                                                                                                                                                                                                                                                                                                                               
    newOpts.inJustDecodeBounds = false;
    int w = newOpts.outWidth;
    int h = newOpts.outHeight;
    // 现在主流手机比较多是800*480分辨率，所以高和宽我们设置为
    float hh = 800f;// 这里设置高度为800f
    float ww = 480f;// 这里设置宽度为480f
    // 缩放比。由于是固定比例缩放，只用高或者宽其中一个数据进行计算即可
    int be = 1;// be=1表示不缩放
    if (w > h && w > ww)
    {// 如果宽度大的话根据宽度固定大小缩放
        be = (int) (newOpts.outWidth / ww);
    }
    else if (w < h && h > hh)
    {// 如果高度高的话根据宽度固定大小缩放
        be = (int) (newOpts.outHeight / hh);
    }
    if (be <= 0)
        be = 1;
    newOpts.inSampleSize = be;// 设置缩放比例
    // 重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了
    bitmap = BitmapFactory.decodeFile(srcPath, newOpts);
    return compressImage(bitmap);// 压缩好比例大小后再进行质量压缩
}
// 图片质量压缩
private static Bitmap compressImage(Bitmap image)
{
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    image.compress(Bitmap.CompressFormat.JPEG, 100, baos);// 质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中
    int options = 100;
    while (baos.toByteArray().length / 1024 > 100)
    { // 循环判断如果压缩后图片是否大于100kb,大于继续压缩
        baos.reset();// 重置baos即清空baos
        image.compress(Bitmap.CompressFormat.JPEG, options, baos);// 这里压缩options%，把压缩后的数据存放到baos中
        options -= 10;// 每次都减少10
    }
    ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());// 把压缩后的数据baos存放到ByteArrayInputStream中
    Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);// 把ByteArrayInputStream数据生成图片
    return bitmap;
}
// 图片按比例大小压缩
private static Bitmap comp(Bitmap image)
{
                                                                                                                                                                                                                                                                                                                                                                               
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    image.compress(Bitmap.CompressFormat.JPEG, 100, baos);
    if (baos.toByteArray().length / 1024 > 1024)
    {// 判断如果图片大于1M,进行压缩避免在生成图片（BitmapFactory.decodeStream）时溢出
        baos.reset();// 重置baos即清空baos
        image.compress(Bitmap.CompressFormat.JPEG, 50, baos);// 这里压缩50%，把压缩后的数据存放到baos中
    }
    ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());
    BitmapFactory.Options newOpts = new BitmapFactory.Options();
    // 开始读入图片，此时把options.inJustDecodeBounds 设回true了
    newOpts.inJustDecodeBounds = true;
    Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, newOpts);
    newOpts.inJustDecodeBounds = false;
    int w = newOpts.outWidth;
    int h = newOpts.outHeight;
    // 现在主流手机比较多是800*480分辨率，所以高和宽我们设置为
    float hh = 800f;// 这里设置高度为800f
    float ww = 480f;// 这里设置宽度为480f
    // 缩放比。由于是固定比例缩放，只用高或者宽其中一个数据进行计算即可
    int be = 1;// be=1表示不缩放
    if (w > h && w > ww)
    {// 如果宽度大的话根据宽度固定大小缩放
        be = (int) (newOpts.outWidth / ww);
    }
    else if (w < h && h > hh)
    {// 如果高度高的话根据宽度固定大小缩放
        be = (int) (newOpts.outHeight / hh);
    }
    if (be <= 0)
        be = 1;
    newOpts.inSampleSize = be;// 设置缩放比例
    // 重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了
    isBm = new ByteArrayInputStream(baos.toByteArray());
    bitmap = BitmapFactory.decodeStream(isBm, null, newOpts);
    return compressImage(bitmap);// 压缩好比例大小后再进行质量压缩
}


5.图片转为文件

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// 图片转为文件
public static boolean saveBitmap2file(Bitmap bmp, String filename)
{
    CompressFormat format = Bitmap.CompressFormat.JPEG;
    int quality = 100;
    OutputStream stream = null;
    try
    {
        stream = new FileOutputStream("/sdcard/" + filename);
    }
    catch (FileNotFoundException e)
    {
        e.printStackTrace();
    }
                                                                                                                                                                                                                                                                                                                                                                      
    return bmp.compress(format, quality, stream);
}


6.屏幕截屏方法

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// 屏幕截屏方法 获取当前屏幕bitmap,转换成bytes[] 调用 UI分享方法
public void printscreen_share(View v)
{
    View view1 = getWindow().getDecorView();
    Display display = getWindowManager().getDefaultDisplay();
    view1.layout(0, 0, display.getWidth(), display.getHeight());
    view1.setDrawingCacheEnabled(true);
    Bitmap bitmap = Bitmap.createBitmap(view1.getDrawingCache());
}


7.把Bitmap 转成 Byte

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// 把Bitmap 转成 Byte
public static byte[] Bitmap2Bytes(Bitmap bm)
{
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
    return baos.toByteArray();
}


8.图片转为文件

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// 图片转为文件
public static boolean saveBitmap2file(Bitmap bmp)
{
    CompressFormat format = Bitmap.CompressFormat.PNG;
    int quality = 100;
    OutputStream stream = null;
    try
    {
        // 判断SDcard状态
        if (!Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()))
        {
            // 错误提示
            return false;
        }
                                                                                                                                                                                                                                                                                                        
        // 检查SDcard空间
        File SDCardRoot = Environment.getExternalStorageDirectory();
        if (SDCardRoot.getFreeSpace() < 10000)
        {
            // 弹出对话框提示用户空间不够
            Log.e("Utils", "存储空间不够");
            return false;
        }
                                                                                                                                                                                                                                                                                                        
        // 在SDcard创建文件夹及文件
        File bitmapFile = new File(SDCardRoot.getPath() + FILE_PATH);
        bitmapFile.getParentFile().mkdirs();// 创建文件夹
        stream = new FileOutputStream(SDCardRoot.getPath() + FILE_PATH);// "/sdcard/"
    }
    catch (FileNotFoundException e)
    {
        e.printStackTrace();
    }
    return bmp.compress(format, quality, stream);
}


9.下载图片

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// 下载图片
public static Bitmap loadImage(String... params)
{
    InputStream is = null;
    Bitmap bitmap = null;
    try
    {
        URL url = new URL(params[0]);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setReadTimeout(5000);
        conn.setConnectTimeout(5000);
        if (HttpURLConnection.HTTP_OK != conn.getResponseCode())
        {
            // 网络连接异常
            Log.e("", "loadImage连接异常");
            return null;
        }
                                                                                                                                                                                                                                                                           
        is = conn.getInputStream();
        bitmap = BitmapFactory.decodeStream(is);
                                                                                                                                                                                                                                                                           
    }
    catch (MalformedURLException e)
    {
        e.printStackTrace();
    }
    catch (IOException e)
    {
        e.printStackTrace();
    }
    finally
    {
        if (null != is)
        {
            try
            {
                is.close();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }
    }
    return bitmap;
}


10.byte[]转换成Bitmap

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// byte[]转换成Bitmap
public static Bitmap Bytes2Bitmap(byte[] b)
{
    if (b.length != 0)
    {
        return BitmapFactory.decodeByteArray(b, 0, b.length);
    }
    return null;
}


11.将字符串转换成Bitmap类型

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public static Bitmap stringtoBitmap(String string)
{
    // 将字符串转换成Bitmap类型
    Bitmap bitmap = null;
    try
    {
        byte[] bitmapArray;
        bitmapArray = Base64.decode(string, Base64.DEFAULT);
        bitmap = BitmapFactory.decodeByteArray(bitmapArray, 0, bitmapArray.length);
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
                                                                                                                                                                                                                                             
    return bitmap;
}


12.将Bitmap转换成字符串

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public static String bitmaptoString(Bitmap bitmap)
{
    // 将Bitmap转换成字符串
    String string = null;
    ByteArrayOutputStream bStream = new ByteArrayOutputStream();
    bitmap.compress(CompressFormat.PNG, 100, bStream);
    byte[] bytes = bStream.toByteArray();
    string = Base64.encodeToString(bytes, Base64.DEFAULT);
    return string;
}


13.byte[]转为文件

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//byte[]转为文件
public static File getFileFromBytes(byte[] b)
{
    BufferedOutputStream stream = null;
    File file = null;
    try
    {
        // 判断SDcard状态
        if (!Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()))
        {
            // 错误提示
            return null;
        }
                                                                                                                                                                                                                       
        // 检查SDcard空间
        File SDCardRoot = Environment.getExternalStorageDirectory();
        if (SDCardRoot.getFreeSpace() < 10000)
        {
            // 弹出对话框提示用户空间不够
            Log.e("Utils", "存储空间不够");
            return null;
        }
                                                                                                                                                                                                                       
        // 在SDcard创建文件夹及文件
        File bitmapFile = new File(SDCardRoot.getPath() + FILE_PATH);
        bitmapFile.getParentFile().mkdirs();// 创建文件夹
                                                                                                                                                                                                                       
        FileOutputStream fstream = new FileOutputStream(bitmapFile);
        stream = new BufferedOutputStream(fstream);
        stream.write(b);
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
    finally
    {
        if (stream != null)
        {
            try
            {
                stream.close();
            }
            catch (IOException e1)
            {
                e1.printStackTrace();
            }
        }
    }
    return file;
}


14.图片压缩

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//图片缩放
public static Bitmap scaleDownBitmap(Bitmap photo, int newHeight, Context context)
{
                                                                                                                                                                                                        
    final float densityMultiplier = context.getResources().getDisplayMetrics().density;
                                                                                                                                                                                                        
    int h = (int) (newHeight * densityMultiplier);
    int w = (int) (h * photo.getWidth() / ((double) photo.getHeight()));
                                                                                                                                                                                                        
    photo = Bitmap.createScaledBitmap(photo, w, h, true);
                                                                                                                                                                                                        
    return photo;
}


15.将byte[]转换成InputStream

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// 将byte[]转换成InputStream
public InputStream Byte2InputStream(byte[] b)
{
    ByteArrayInputStream bais = new ByteArrayInputStream(b);
    return bais;
}


16.将InputStream转换成byte[]

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// 将InputStream转换成byte[]
public byte[] InputStream2Bytes(InputStream is)
{
    String str = "";
    byte[] readByte = new byte[1024];
    int readCount = -1;
    try
    {
        while ((readCount = is.read(readByte, 0, 1024)) != -1)
        {
            str += new String(readByte).trim();
        }
        return str.getBytes();
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
    return null;
}


17.将Bitmap转换成InputStream

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// 将Bitmap转换成InputStream
public InputStream Bitmap2InputStream(Bitmap bm)
{
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    bm.compress(Bitmap.CompressFormat.JPEG, 100, baos);
    InputStream is = new ByteArrayInputStream(baos.toByteArray());
    return is;
}


18.将Bitmap转换成InputStream

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// 将Bitmap转换成InputStream
public InputStream Bitmap2InputStream(Bitmap bm, int quality)
{
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    bm.compress(Bitmap.CompressFormat.PNG, quality, baos);
    InputStream is = new ByteArrayInputStream(baos.toByteArray());
    return is;
}



19.将InputStream转换成Bitmap

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// 将InputStream转换成Bitmap
public Bitmap InputStream2Bitmap(InputStream is)
{
    return BitmapFactory.decodeStream(is);
}


20.Drawable转换成InputStream

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// Drawable转换成InputStream
public InputStream Drawable2InputStream(Drawable d)
{
    Bitmap bitmap = this.drawable2Bitmap(d);
    return this.Bitmap2InputStream(bitmap);
}


21.InputStream转换成Drawable

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// InputStream转换成Drawable
public Drawable InputStream2Drawable(InputStream is)
{
    Bitmap bitmap = this.InputStream2Bitmap(is);
    return this.bitmap2Drawable(bitmap);
}


22.Drawable转换成byte[]

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// Drawable转换成byte[]
public byte[] Drawable2Bytes(Drawable d)
{
    Bitmap bitmap = this.drawable2Bitmap(d);
    return this.Bitmap2Bytes(bitmap);
}


23.byte[]转换成Drawable

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// byte[]转换成Drawable
public Drawable Bytes2Drawable(byte[] b)
{
    Bitmap bitmap = this.Bytes2Bitmap(b);
    return this.bitmap2Drawable(bitmap);
}


24.Drawable转换成Bitmap

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// Drawable转换成Bitmap
public Bitmap drawable2Bitmap(Drawable drawable)
{
    Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(),
            drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565);
    Canvas canvas = new Canvas(bitmap);
    drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
    drawable.draw(canvas);
    return bitmap;
}


25.Bitmap转换成Drawable

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// Bitmap转换成Drawable
public Drawable bitmap2Drawable(Bitmap bitmap)
{
    BitmapDrawable bd = new BitmapDrawable(bitmap);
    Drawable d = (Drawable) bd;
    return d;
}

Mr_zhangxs
关注
Android图片压缩，Drawable和Bitmap转换，bitmap和base64转换，网络资源图片转化成bitmap，File-Base64-MultipartFile之间相互转换
qq_36158551的博客
04-27 3167
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xiayiye5的博客
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老套路先看效果图： 如上图：分别是bitmap转base64和base64转bitmap 直接上代码。看工具类 package com.example.apidemo.util; /* * Copyright (c) 2019, smuyyh@gmail.com All Rights Reserved. * # ...
Bitmap Converter:将图像从一种格式转换为另一种格式（BMP，JPEG，PNG等）-开源
05-28
位图转换器是一种用于转换不同类型的位图文件（例如BMP，JPG，PNG，GIF等）的软件。选择目录，然后选择起始格式和目标格式，然后单击确定。
uC-GUI-BitmapConvert
02-20
Bitmap Converter是一款可以将位图转化为C文件的软件，用于ucGUI的编程 (Bitmap Converter)
uC-GUI-BitmapConvert.exe
07-06
uCGUI&emWin;位图转换工具exe文件。
uC-GUI-BitmapConvert bmp转256色工具.zip
11-13
uC-GUI-BitmapConvert bmp转256色工具 嵌入式开发可用 方便将图片转成256色
实现Drawable、Bitmap与InputStream互相转换的工具类
本文将详细介绍Drawable、Bitmap、InputStream和byte[]之间的相互转换方法，并介绍实现这些转换的工具类设计，以及单例模式的应用。 ### Drawable与Bitmap之间的转换 Drawable是Android中用于图形表示的一个抽象类...
Drawable Bitmap InputStream byte[]相互转化工具类
01-07
在Android开发中，处理图像数据时，我们经常需要在Drawable、Bitmap、InputStream和byte数组之间进行转换。这些类型的转换在不同的场景下具有重要的作用，例如从网络加载图片、存储图片到本地或者显示在ImageView上...
Android开发：深入理解Bitmap与Canvas
2. 使用BitmapFactory：BitmapFactory是一个静态工具类，可以从多种源创建Bitmap对象，如文件、流、字节数组等。通过`decodeResource()`方法，传入`Resources`和资源ID，可以直接解析位图。 ```java Bitmap bmp = ...
C#下“Bitmap”转换为“BitmapImage”，“Bitmap”转换成“BitmapSource”
qq_35320456的博客
02-04 2345
C#下“Bitmap”转换为“BitmapImage”，“Bitmap”转换成“BitmapSource”
oracle bitmap convert,学习笔记:Oracle SQL优化 执行计划中BITMAP CONVERSION FROM ROW
weixin_29041443的博客
04-15 881
天萃荷净执行计划 BITMAP CONVERSION FROM ROWIDS在有些执行计划中，可以会看到 BITMAP CONVERSION FROM ROWIDS这样的东东，也许你会感觉奇怪，我没有使用位图索引怎么出现了bitmap。我通过一个sql和大家分析下原因：sql语句为：SELECT *FROM (SELECT a.*, ROWNUM rnFROM ( SELECT module_n...
C# 数组转Bitmap
最新发布
czhgysdtl的博客
08-11 496
而我们需要将这些数组转成Bitmap来显示或者做一些处理。那么如何用C#语言来快速高效对其进行转换？
Android Bitmap与DrawAble与byte[]与InputStream之间的转换
qq_33863614的博客
02-19 292
public class FormatTools {      private static FormatTools tools = new FormatTools();        public static FormatTools getInstance() {          if (tools == null) {              tools = new FormatTo...
android inputstream转bitmap,android Bitmap与Drawable与byte[]与InputStream之间的转换工具类...
weixin_31046701的博客
05-28 465
package com.shntec.xmm.platform;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.InputStream;import android.graphics.Bitmap;import android.graphics.BitmapFactory...
bitmap 与 InputStream、filePath 、resId 、ByteArray、URL互转
火星男孩的分享空间
10-18 422
转bitmap //BitmapFactory.Options : 可配置比例压缩 public class BitmapFactory { //ByteArray -> Bitmap public static Bitmap decodeByteArray(byte[] data, int offset, int length, ...
Android 图片转化工具类BitmapUtil
lovoo的博客
04-20 1105
/** * 图片转化工具 * @author chen.lin * */ public class BitmapUtils { private static Map<String, SoftReference<Bitmap>> imageCache = new HashMap<String, SoftReference<Bitmap>>(); public static void
Android Bitmap、InputStream、Drawable、byte[]、Base64之间的转换关系
qq_21467035的博客
08-21 970
【代码】Android Bitmap、InputStream、Drawable、byte[]、Base64之间的转换关系。
ucGUI 图片显示方法
weixin_34237596的博客
03-30 391
图片显示步骤 运行uC-GUI-BitmapConvert.exe，打开图片file->open. 下载地址：http://download.youkuaiyun.com/detail/markmin214/5201560 选择调色板，这里使用自动调色板 Fi...
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