小编Jay*_*nna的帖子

我试图将数据发布到我在mLab上创建的数据库,我收到此错误但我不知道什么是错误.我也读过有关此主题的先前询问的问题,但我无法解决我的错误我是新来的.所以我在这里发布我正在尝试实现的代码,它来自本教程https://medium.freecodecamp.com/building-a-simple-node-js-api-in-under-30-minutes- a07ea9e390d2.

server.js

const express = require('express');
const MongoClient = require('mongodb').MongoClient;
const bodyParser = require('body-parser');

const db = require('./config/db');


const app = express();

const port = 8000;

app.use(bodyParser.urlencoded({extened:true}));


MongoClient.connect(db.url,(err,database) =>{

    if (err) return console.log(err)
    require('./app/routes')(app,{});
    app.listen(port,() => {
        console.log("We are live on"+port); 
    });

})

db.js

module.exports = {
  url : "mongodb://JayTanna:Jay12345@ds147510.mlab.com:47510/testing"
};

index.js

const noteroutes = require('./note_routes');

module.exports = function(app,db)
{
    noteroutes(app,db);

};

note_routes.js

module.exports = function(app, db) {
  app.post('/notes', (req, res) => {
    const note = { …

我是新手,在android中使用图像.我想从内部存储加载图像但它给我权限被拒绝错误然后我已经添加了对android清单文件的权限.但我仍然无法完成任务.

这是我的代码:

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ImageView image = (ImageView)findViewById(R.id.imageView);
        Bitmap bm = BitmapFactory.decodeFile("/storage/emulated/0/DCIM/Camera/IMG_20151102_193132.jpg");
        image.setImageBitmap(bm);

    }
}

logcat的:

01-16 15:16:11.345 6533-6533/com.example.jaytanna.imagemap E/BitmapFactory: Unable to decode stream: java.io.FileNotFoundException: /storage/emulated/0/DCIM/Camera/IMG_20151102_193132.jpg: open failed: EACCES (Permission denied)

它没有显示任何图像.请帮助我.谢谢.