项目中常常遇到文件压缩问题,上传文件大小限制
今天简单的分享一点干货,文件压缩,图片压缩,压缩Bitmap
主要通过尺寸压缩和质量压缩,以达到清晰度最优
效果图
源码地址: https://github.com/DickyQie/android-util
工具类代码
public class CompressHelper { private static volatile CompressHelper INSTANCE; private Context context; /** * 最大宽度,默认为720 */ private float maxWidth = 720.0f; /** * 最大高度,默认为960 */ private float maxHeight = 960.0f; /** * 默认压缩后的方式为JPEG */ private Bitmap.CompressFormat compressFormat = Bitmap.CompressFormat.JPEG; /** * 默认的图片处理方式是ARGB_8888 */ private Bitmap.Config bitmapConfig = Bitmap.Config.ARGB_8888; /** * 默认压缩质量为80 */ private int quality = 80; /** * 存储路径 */ private String destinationDirectoryPath; /** * 文件名前缀 */ private String fileNamePrefix; /** * 文件名 */ private String fileName; public static CompressHelper getDefault(Context context) { if (INSTANCE == null) { synchronized (CompressHelper.class) { if (INSTANCE == null) { INSTANCE = new CompressHelper(context); } } } return INSTANCE; } private CompressHelper(Context context) { this.context = context; destinationDirectoryPath = context.getCacheDir().getPath() + File.pathSeparator + FileUtil.FILES_PATH; } /** * 压缩成文件 * @param file 原始文件 * @return 压缩后的文件 */ public File compressToFile(File file) { return BitmapUtil.compressImage(context, Uri.fromFile(file), maxWidth, maxHeight, compressFormat, bitmapConfig, quality, destinationDirectoryPath, fileNamePrefix, fileName); } /** * 压缩为Bitmap * @param file 原始文件 * @return 压缩后的Bitmap */ public Bitmap compressToBitmap(File file) { return BitmapUtil.getScaledBitmap(context, Uri.fromFile(file), maxWidth, maxHeight, bitmapConfig); } /** * 采用建造者模式,设置Builder */ public static class Builder { private CompressHelper mCompressHelper; public Builder(Context context) { mCompressHelper = new CompressHelper(context); } /** * 设置图片最大宽度 * @param maxWidth 最大宽度 */ public Builder setMaxWidth(float maxWidth) { mCompressHelper.maxWidth = maxWidth; return this; } /** * 设置图片最大高度 * @param maxHeight 最大高度 */ public Builder setMaxHeight(float maxHeight) { mCompressHelper.maxHeight = maxHeight; return this; } /** * 设置压缩的后缀格式 */ public Builder setCompressFormat(Bitmap.CompressFormat compressFormat) { mCompressHelper.compressFormat = compressFormat; return this; } /** * 设置Bitmap的参数 */ public Builder setBitmapConfig(Bitmap.Config bitmapConfig) { mCompressHelper.bitmapConfig = bitmapConfig; return this; } /** * 设置压缩质量,建议80 * @param quality 压缩质量,[0,100] */ public Builder setQuality(int quality) { mCompressHelper.quality = quality; return this; } /** * 设置目的存储路径 * @param destinationDirectoryPath 目的路径 */ public Builder setDestinationDirectoryPath(String destinationDirectoryPath) { mCompressHelper.destinationDirectoryPath = destinationDirectoryPath; return this; } /** * 设置文件前缀 * @param prefix 前缀 */ public Builder setFileNamePrefix(String prefix) { mCompressHelper.fileNamePrefix = prefix; return this; } /** * 设置文件名称 * @param fileName 文件名 */ public Builder setFileName(String fileName) { mCompressHelper.fileName = fileName; return this; } public CompressHelper build() { return mCompressHelper; } } }
使用
File oldFile = CompressHelper.getDefault(getApplicationContext()).compressToFile(file);
自定义属性使用
File newFile = new CompressHelper.Builder(this) .setMaxWidth(720) // 默认最大宽度为720 .setMaxHeight(960) // 默认最大高度为960 .setQuality(80) // 默认压缩质量为80 .setFileName(yourFileName) // 文件名称 .setCompressFormat(CompressFormat.JPEG) // 设置默认压缩为jpg格式 .setDestinationDirectoryPath(Environment.getExternalStoragePublicDirectory( Environment.DIRECTORY_PICTURES).getAbsolutePath())//路径 .build() .compressToFile(oldFile);
该案例参考了: