CODEWITHSUNDEEP
androidjava-meresourcesinputstreamandroid-resources
Arkaha
Arkaha

Reputation: 1612

How to get access to raw resources that I put in res folder?

In J2ME, I've do this like that: getClass().getResourceAsStream("/raw_resources.dat");

But in android, I always get null on this, why?

Upvotes: 63

Views: 141234

Answers (8)

yoAlex5
yoAlex5

Reputation: 34195

Android access to raw resources

An advance approach is using Kotlin Extension function

fun Context.getRawInput(@RawRes resourceId: Int): InputStream {
    return resources.openRawResource(resourceId)
}

One more interesting thing is extension function use that is defined in Closeable scope

For example you can work with input stream in elegant way without handling Exceptions and memory managing

fun Context.readRaw(@RawRes resourceId: Int): String {
    return resources.openRawResource(resourceId).bufferedReader(Charsets.UTF_8).use { it.readText() }
}

Upvotes: 9

IgniteCoders
IgniteCoders

Reputation: 4980

This worked for for me: getResources().openRawResource(R.raw.certificate)

Upvotes: -1

0xF
0xF

Reputation: 3698

getClass().getResourcesAsStream() works fine on Android. Just make sure the file you are trying to open is correctly embedded in your APK (open the APK as ZIP).

Normally on Android you put such files in the assets directory. So if you put the raw_resources.dat in the assets subdirectory of your project, it will end up in the assets directory in the APK and you can use:

getClass().getResourcesAsStream("/assets/raw_resources.dat");

It is also possible to customize the build process so that the file doesn't land in the assets directory in the APK.

Upvotes: 6

java dev
java dev

Reputation: 1074

InputStream in = getResources().openRawResource(resourceName);

This will work correctly. Before that you have to create the xml file / text file in raw resource. Then it will be accessible.

Edit
Some times com.andriod.R will be imported if there is any error in layout file or image names. So You have to import package correctly, then only the raw file will be accessible.

Upvotes: 3

sravan
sravan

Reputation: 5333

In some situations we have to get image from drawable or raw folder using image name instead if generated id 

// Image View Object 
        mIv = (ImageView) findViewById(R.id.xidIma);
// create context Object for  to Fetch  image from resourse 
Context mContext=getApplicationContext();

// getResources().getIdentifier("image_name","res_folder_name", package_name);

// find out below example 
    int i = mContext.getResources().getIdentifier("ic_launcher","raw", mContext.getPackageName());

// now we will get contsant id for that image       
        mIv.setBackgroundResource(i);

Upvotes: 16

poojan9118
poojan9118

Reputation: 2373

TextView txtvw = (TextView)findViewById(R.id.TextView01);
        txtvw.setText(readTxt());

 private String readTxt()
    {
    InputStream raw = getResources().openRawResource(R.raw.hello);

    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

    int i;
    try
    {
        i = raw.read();
        while (i != -1)
        {
            byteArrayOutputStream.write(i);
            i = raw.read();
        }
        raw.close();
    }
    catch (IOException e)
    {
        // TODO Auto-generated catch block

        e.printStackTrace();
    }


    return byteArrayOutputStream.toString();

}

TextView01:: txtview in linearlayout hello:: .txt file in res/raw folder (u can access ny othr folder as wel)

Ist 2 lines are 2 written in onCreate() method

rest is to be written in class extending Activity!!

Upvotes: 6

Adrian Vintu
Adrian Vintu

Reputation: 396

InputStream raw = context.getAssets().open("filename.ext");

Reader is = new BufferedReader(new InputStreamReader(raw, "UTF8"));

Upvotes: 26

Samuh
Samuh

Reputation: 36484

For raw files, you should consider creating a raw folder inside res directory and then call getResources().openRawResource(resourceName) from your activity.

Upvotes: 137

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