com.exercise.AndroidClient.RecvFrom.java Source code

Introduction

Here is the source code for com.exercise.AndroidClient.RecvFrom.java

Source

package com.exercise.AndroidClient;

// AndroidPush project
// Copyright 2012 Philippe Quesnel
// Licensed under the Academic Free License version 3.0

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONTokener;

import android.app.DownloadManager;
import android.app.DownloadManager.Request;
import android.net.Uri;
import android.os.Environment;

public class RecvFrom {
    DownloadManager downloadMgr;
    Map<String, String> destDirTypes;

    String json;
    Boolean valid = false;
    private String errMessage;

    int remotePort;
    String remoteHost;
    String destinationType;
    String subDir;
    String filename;

    RecvFrom(DownloadManager downloadMgr, String json, String remoteHost) throws JSONException {
        this.downloadMgr = downloadMgr;
        this.remoteHost = remoteHost;
        this.json = json;
        parseJson(json);
        // setup map for getExternalStoragePublicDirectory values 
        destDirTypes = new HashMap<String, String>();
        destDirTypes.put("music", Environment.DIRECTORY_MUSIC);
        destDirTypes.put("downloads", Environment.DIRECTORY_DOWNLOADS);
        destDirTypes.put("pictures", Environment.DIRECTORY_PICTURES);
        destDirTypes.put("movies", Environment.DIRECTORY_MOVIES);
        valid = true;
    }

    RecvFrom(String errMessage) {
        this.errMessage = errMessage;
        valid = false;
    }

    public String getErrMessage() {
        return errMessage;
    }

    public void setErrMessage(String errMessage) {
        this.errMessage = errMessage;
    }

    public void addErrMessage(String errMessage) {
        if (this.errMessage == null)
            this.errMessage = errMessage;
        else
            this.errMessage += errMessage;
    }

    public void execute() throws IOException {
        // get source URL
        Uri srcUri = getSrcFileUri();

        // get file destination
        Uri destFileUri = getDestFileUri();

        // build the request we will pass to download manager 
        Request request = new Request(srcUri);
        request.setDestinationUri(destFileUri).setDescription("Push to Android from PC").setTitle(filename)
                //.setAllowedOverMetered(false) //api 16
                .setAllowedNetworkTypes(Request.NETWORK_WIFI) // only through wifi !
                .setNotificationVisibility(Request.VISIBILITY_VISIBLE).allowScanningByMediaScanner();

        // ask download manager to download our file.
        // system service that runs in the background,
        // will show status in notif bar, can be seen / stop etc in the 'Downloads' app
        long downloadId = downloadMgr.enqueue(request);
    }

    private Uri getSrcFileUri() {
        // get source URL 
        Uri.Builder builder = new Uri.Builder();
        builder.scheme("http").encodedPath("//" + remoteHost + ":" + remotePort).appendPath(filename);

        return builder.build();

        //      String srcUrl = "http:/" + remoteHost + ":" + remotePort;
        //      srcUrl = srcUrl + "/" + filename;
        //      Uri srcUri = Uri.parse(srcUrl);
    }

    private Uri getDestFileUri() throws IOException {

        // map "music" to Environment.DIRECTORY_MUSIC 
        String destDir = destDirTypes.get(destinationType);
        if (destDir == null)
            throw new IllegalArgumentException("Invalid destination dir type : " + destinationType);

        // get the public 'standard directory', ie Download, Music etc
        File dir = Environment.getExternalStoragePublicDirectory(destDir);

        // add any subdir asked by caller & create dir struct upto the subdir if required
        dir = new File(dir, subDir);
        if (!dir.exists() || !dir.isDirectory()) {
            if (!dir.mkdirs())
                throw new IOException("Failed to create directories : " + dir.toString());
        }

        // the full path to the file
        File path = new File(dir, filename);
        return Uri.fromFile(path);
    }

    /** extract data from the jons object string */
    private void parseJson(String json) throws JSONException {
        JSONObject object = (JSONObject) new JSONTokener(json).nextValue();
        remotePort = object.getInt("recvFromPort");
        filename = object.getString("file");
        subDir = object.getString("subDir");
        destinationType = object.getString("destDirType");
    }

}