Glide，当缓存大小大于 50 mb 时清除缓存

Question

我正在使用 Glide 库来加载图像。我的应用程序中有很多图像，所以一旦缓存大小大于 50 MB，我想清除缓存。 有人可以帮我这样做吗？

Answer 1

在 UI 线程外调用 Glide.get(context).clearDiskCache()。 （也考虑 clearMemory() 以防止清除磁盘缓存后出现意外）这对我有用

new Thread(new Runnable() {
          @Override
          public void run() {
             Glide.get(MainActivity.this).clearDiskCache();
          }
     }).start();

我的应用中有很多图像，所以我想在缓存大小大于 50 mb 时清除缓存。

如果你想限制 50 mb，你可以实现 glide 模块

import android.annotation.TargetApi;
import android.content.Context;
import android.os.Build;
import android.os.Environment;
import android.os.StatFs;
import android.util.Log;

import com.bumptech.glide.Glide;
import com.bumptech.glide.GlideBuilder;
import com.bumptech.glide.load.engine.cache.InternalCacheDiskCacheFactory;
import com.bumptech.glide.module.GlideModule;
import com.example.MyApplication;

import java.util.Locale;

public class LimitCacheSizeGlideModule implements GlideModule {
    // Modern device should have 8GB (=7.45GiB) or more!
    private static final int SMALL_INTERNAL_STORAGE_THRESHOLD_GIB = 6;
    private static final int DISK_CACHE_SIZE_FOR_SMALL_INTERNAL_STORAGE_MIB = 50*1024*1024;

    @Override
    public void applyOptions(Context context, GlideBuilder builder) {
        if (MyApplication.from(context).isTest()) return; // NOTE: StatFs will crash on robolectric.

        double totalGiB = getTotalBytesOfInternalStorage() / 1024.0 / 1024.0 / 1024.0;
        Log.i(String.format(Locale.US, "Internal Storage Size: %.1fGiB", totalGiB));
        if (totalGiB < SMALL_INTERNAL_STORAGE_THRESHOLD_GIB) {
            Log.i("Limiting image cache size to " + DISK_CACHE_SIZE_FOR_SMALL_INTERNAL_STORAGE_MIB + "MiB");
            builder.setDiskCache(new InternalCacheDiskCacheFactory(context, DISK_CACHE_SIZE_FOR_SMALL_INTERNAL_STORAGE_MIB));
        }
    }

    @Override
    public void registerComponents(Context context, Glide glide) {
    }

    private long getTotalBytesOfInternalStorage() {
        // http://stackoverflow.com/a/4595449/1474113
        StatFs stat = new StatFs(Environment.getDataDirectory().getPath());
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
            return getTotalBytesOfInternalStorageWithStatFs(stat);
        } else {
            return getTotalBytesOfInternalStorageWithStatFsPreJBMR2(stat);
        }
    }

    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
    private long getTotalBytesOfInternalStorageWithStatFs(StatFs stat) {
        return stat.getTotalBytes();
    }

    @SuppressWarnings("deprecation")
    private long getTotalBytesOfInternalStorageWithStatFsPreJBMR2(StatFs stat) {
        return (long) stat.getBlockSize() * stat.getBlockCount();
    }
}

然后在你的清单中像这样添加它

<manifest

    ...

    <application>

        <meta-data
            android:name="YourPackageNameHere.LimitCacheSizeGlideModule"
            android:value="GlideModule" />

        ...

    </application>
</manifest>