android file.delete()删除文件失败？

Question

权限都加了，为什么删除老是失败？

File file = new File(Settings.PIC_PATH);
Log.e("tag", Settings.PIC_PATH);
if (file.exists()) {
boolean f = file.delete();
if(f){
toast("清理成功！");
}
Log.e("tag", f + "");
}

输出结果：
09-09 15:17:33.909: E/tag(31757): /storage/emulated/0/com.kyle.rrhl/pic
09-09 15:17:33.909: E/tag(31757): false

Answer 1

查看一下错误返回信息等，可能还是权限不够