android开发分享uniapp计算app缓存和清理缓存

计算

data(){ return { fileSizeString:'' } }, //methods formatSize() { let that = this; plus.cache.calculate(function(size) { let sizeCache = parseInt(size); if (sizeCache == 0) { that.fileSizeString = "0B"; } else if (sizeCache < 1024) { that.fileSizeString = sizeCache + "B"; } else if (sizeCache < 1048576) { that.fileSizeString = (sizeCache / 1024).toFixed(2) + "KB"; } else if (sizeCache < 1073741824) { that.fileSizeString = (sizeCache / 1048576).toFixed(2) + "MB"; } else { that.fileSizeString = (sizeCache / 1073741824).toFixed(2) + "GB"; } }); } 

清除

 clearCache() { let that = this; let os = plus.os.name; if (os == 'Android') { let main = plus.android.runtimeMainActivity(); let sdRoot = main.getCacheDir(); let files = plus.android.invoke(sdRoot, "listFiles"); let len = files.length; for (let i = 0; i < len; i++) { let filePath = '' + files[i]; // 没有找到合适的方法获取路径，这样写可以转成文件路径  plus.io.resolveLocalFileSystemURL(filePath, function(entry) { if (entry.isDirectory) { entry.removeRecursively(function(entry) { //递归删除其下的所有文件及子目录  uni.showToast({ title: '缓存清理完成', duration: 2000 }); that.formatSize(); // 重新计算缓存  }, function(e) { console.log(e.message) }); } else { entry.remove(); } }, function(e) { console.log('文件路径读取失败') }); } } else { // ios  plus.cache.clear(function() { uni.showToast({ title: '缓存清理完成', duration: 2000 }); that.formatSize(); }); } }