通过文件选择插件获取本地文件路径 文件选择插件
//this.pathArr[0].url 为文件路径
void plus.io.resolveLocalFileSystemURL(this.pathArr[0].url, (FileEntry) => {
FileEntry.file((file) => {
var fileReader = new plus.io.FileReader();
fileReader.readAsDataURL(file);
fileReader.onloadend = function(evt) {
//evt.target.result 为 base64数据
_this.base64Toutf8(evt.target.result)
}
})
});
},
//根据base64转字节数组
base64Toutf8(base64) {
//去除base64文件头
base64 = base64.replace(/^data:+.+;base64,/, "");
var strArr = [];
var n = 256;
var l = base64.length;
console.log(base64)
console.log(l)
for (let i = 0; i < l / n; i++) {
let a = base64.slice(n * i, n * (i + 1))
strArr.push(a)
}
let byteArr = []
let byteArr2=[]
let Base64 = plus.android.importClass("java.util.Base64");
let decoder = Base64.getDecoder();
for (let k = 0; k < strArr.length; k++) {
let bytes = decoder.decode(strArr[k]);
if (bytes !== null) {
for (let j = 0; j < bytes.length; j++) {
bytes[j] = bytes[j] & 0xFF
}
byteArr.push(...bytes)
} else {
console.log(strArr[k])
}
}
},
