android 图片缓存工具类,Android工具类系列-Glide图片缓存与圆角
Glide的圖片緩存和清除圖片緩存
public class GlideCacheUtil {
private static GlideCacheUtil inst;
public static GlideCacheUtil getInstance() {
if (inst == null) {
inst = new GlideCacheUtil();
}
return inst;
}
/**
* 清除圖片磁盤緩存
*/
public void clearImageDiskCache(final Context context) {
try {
if (Looper.myLooper() == Looper.getMainLooper()) {
new Thread(new Runnable() {
@Override
public void run() {
Glide.get(context).clearDiskCache();
// BusUtil.getBus().post(new GlideCacheClearSuccessEvent());
}
}).start();
} else {
Glide.get(context).clearDiskCache();
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 清除圖片內存緩存
*/
public void clearImageMemoryCache(Context context) {
try {
if (Looper.myLooper() == Looper.getMainLooper()) { //只能在主線程執行
Glide.get(context).clearMemory();
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 清除圖片所有緩存
*/
public void clearImageAllCache(Context context) {
clearImageDiskCache(context);
clearImageMemoryCache(context);
String ImageExternalCatchDir=context.getExternalCacheDir()+ ExternalCacheDiskCacheFactory.DEFAULT_DISK_CACHE_DIR;
deleteFolderFile(ImageExternalCatchDir, true);
}
/**
* 獲取Glide造成的緩存大小
*
* @return CacheSize
*/
public String getCacheSize(Context context) {
try {
return getFormatSize(getFolderSize(new File(context.getCacheDir() + "/"+ InternalCacheDiskCacheFactory.DEFAULT_DISK_CACHE_DIR)));
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
/**
* 獲取指定文件夾內所有文件大小的和
*
* @param file file
* @return size
* @throws Exception
*/
private long getFolderSize(File file) throws Exception {
long size = 0;
try {
File[] fileList = file.listFiles();
for (File aFileList : fileList) {
if (aFileList.isDirectory()) {
size = size + getFolderSize(aFileList);
} else {
size = size + aFileList.length();
}
}
} catch (Exception e) {
e.printStackTrace();
}
return size;
}
/**
* 刪除指定目錄下的文件，這里用于緩存的刪除
*
* @param filePath filePath
* @param deleteThisPath deleteThisPath
*/
private void deleteFolderFile(String filePath, boolean deleteThisPath) {
if (!TextUtils.isEmpty(filePath)) {
try {
File file = new File(filePath);
if (file.isDirectory()) {
File files[] = file.listFiles();
for (File file1 : files) {
deleteFolderFile(file1.getAbsolutePath(), true);
}
}
if (deleteThisPath) {
if (!file.isDirectory()) {
file.delete();
} else {
if (file.listFiles().length == 0) {
file.delete();
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* 格式化單位
*
* @param size size
* @return size
*/
private static String getFormatSize(double size) {
double kiloByte = size / 1024;
if (kiloByte < 1) {
return size + "Byte";
}
double megaByte = kiloByte / 1024;
if (megaByte < 1) {
BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "KB";
}
double gigaByte = megaByte / 1024;
if (gigaByte < 1) {
BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "MB";
}
double teraBytes = gigaByte / 1024;
if (teraBytes < 1) {
BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "GB";
}
BigDecimal result4 = new BigDecimal(teraBytes);
return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "TB";
}
}
圓形圖片工具類
public class GlideCircleTransform extends BitmapTransformation {
public GlideCircleTransform(Context context) {
super(context);
}
@Override
protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
return circleCrop(pool, toTransform);
}
private static Bitmap circleCrop(BitmapPool pool, Bitmap source) {
if (source == null) return null;
int size = Math.min(source.getWidth(), source.getHeight());
int x = (source.getWidth() - size) / 2;
int y = (source.getHeight() - size) / 2;
// TODO this could be acquired from the pool too
Bitmap squared = Bitmap.createBitmap(source, x, y, size, size);
Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888);
if (result == null) {
result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
}
Canvas canvas = new Canvas(result);
Paint paint = new Paint();
paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
paint.setAntiAlias(true);
float r = size / 2f;
canvas.drawCircle(r, r, r, paint);
return result;
}
@Override
public String getId() {
return getClass().getName();
}
}
使用
.transform(new GlideCircleTransform(context))
網絡鏈接失敗加載圖片
.error(R.mipmap.ic_launcher)
Glide.with(context).load(desc.get(position).getUserImage()).transform(new GlideCircleTransform(context)).error(R.mipmap.ic_launcher).into(holder.imgHomelv);
總結
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