I'm working on a sort of a magazine app which contains a lot of txt files which I read the text from (only read not write) , And I'm a little bit confused , I have read the documentation about file storage but still don't seem to get the right way to store my txt files. Should those files be in the the Assets? Is it possible to have a folders inside the assets? And if yes how can I acsses these folders?
res/raw will be a good place to put them. If you placed a text file named "article.txt" in the raw resource folder, you would start by putting the file into an InputStream like this (note that "ctx" is a Context which an Activity inherits from):
InputStream inputStream = ctx.getResources().openRawResource(R.raw.article);
Then you turn the InputStream into a String. This can be done about 1000 different ways. Here's one way:
InputStreamReader inputreader = new InputStreamReader(inputStream);
BufferedReader buffreader = new BufferedReader(inputreader);
String line;
StringBuilder text = new StringBuilder();
try {
while (( line = buffreader.readLine()) != null) {
text.append(line);
text.append('\n');
}
} catch (IOException e) {
return null;
}
String fileContentsStr = text.toString();
Here is a fully working method (using the above conversion technique) to turn a text file from the raw folder into a string. Which I got from this post Android read text raw resource file.
public static String readRawTextFile(Context ctx, int resId)
{
InputStream inputStream = ctx.getResources().openRawResource(resId);
InputStreamReader inputreader = new InputStreamReader(inputStream);
BufferedReader buffreader = new BufferedReader(inputreader);
String line;
StringBuilder text = new StringBuilder();
try {
while (( line = buffreader.readLine()) != null) {
text.append(line);
text.append('\n');
}
} catch (IOException e) {
return null;
}
return text.toString();
}
Using "article.txt" still, you would call this method from an Activity like so:
readRawTextFile(this, R.raw.article);
Related
I created a file on my pc, and I want my app to read from it.
How do I read from that file in my app?
Thanks
Put the file in assets/ (e.g., app/src/main/assets/ in a typical Android Studio project). Then use open() on an AssetManager to get an InputStream on that content. You can get an AssetManager from your Activity or other Context by calling getAssets().
Move your file to card and add path instead of "file.txt"
File sdcard = Environment.getExternalStorageDirectory();
//Get the text file
File file = new File(sdcard,"file.txt");
//Read text from file
StringBuilder text = new StringBuilder();
try {
BufferedReader br = new BufferedReader(new FileReader(file));
String line;
while ((line = br.readLine()) != null) {
text.append(line);
text.append('\n');
}
br.close();
}catch (IOException e) {
//You'll need to add proper error handling here
}
//Find the view by its id
TextView tv = (TextView)findViewById(R.id.text_view);
//Set the text
tv.setText(text);
it example best if you want to read text
i have been experiencing problem reading data from text files which resides in my internal storage of my mobile phone. My code is as below:
public void recommend(View view) {
Context context = getApplicationContext();
String filename = "SendLog.txt";
TextView tv = (TextView)findViewById(R.id.textView134);
try {
FileInputStream fis = context.openFileInput(filename);
InputStreamReader isr = new InputStreamReader(fis, "UTF-8");
BufferedReader bufferedReader = new BufferedReader(isr);
StringBuilder sb = new StringBuilder();
String line;
while ((line = bufferedReader.readLine()) != null) {
sb.append(line).append("\n");
tv.getText();
tv.setText(line);
}
} catch (IOException e) {
e.getStackTrace();
}
I'm not getting any data input to my mobile phone. My "SendLog.txt" file reside in /storage/emulated/0/SendLog.txt directory. Anyone can assist me? I want to read everything from the text file and display in textView134. Anyone can assist?
Thank you in advance!
"/storage/emulated/0/SendLog.txt" is located on the External Storage, not the internal.
Instead of context.openFileInput(filename) you should be using Environment.getExtenalStorageDirectory() for example,
FileInputStream fis = new FileInputStream(new File(Environment.getExtenalStorageDirectory(), filename));
Though you will need to handle possibilities such as the External Storage being unavailable / unmounted.
You will also need the manifest permission to read external storage, or alternately to write it if you plan to do that as well (you only need one of the two, as write implies read).
You are building a string using stringbuilder but instead are settexting line. The result is last line in file, which may be an empty line
I have a text file called words.txt in folder raw within android res folder. I don't know how to get its path to make a new file with the given path. I use the code below, but seems it just doesn't work:
File file = new File("res/raw/words.txt").getAbsoluteFile();
String filePath = file.getAbsolutePath();
File wordFile = new File(filePath);
You can read the raw/words.txt as follows:
// The InputStream opens the resourceId and sends it to the buffer
InputStream is = this.getResources().openRawResource(R.raw.words);
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String readLine = null;
try {
// While the BufferedReader readLine is not null
while ((readLine = br.readLine()) != null) {
Log.d("TEXT", readLine);
}
// Close the InputStream and BufferedReader
is.close();
br.close();
} catch (IOException e) {
e.printStackTrace();
}
Note: this code must be inside an Activity class, as this.getResources() refers to Context.getResources()
You can't write to your own app's res folder. It is not modifiable.
You can create a file here though:
http://developer.android.com/reference/android/content/Context.html#getFilesDir%28%29
If you want to use words.txt as a baseline, you can read from it and copy it to a modifiable file at runtime.
This is my code:
File root = Environment.getExternalStorageDirectory();
File dir = new File (root.getAbsolutePath() + "/Bonbon info");
dir.mkdirs();
File f = new File(dir, "paket.txt");
StringBuilder text = new StringBuilder();
try {
BufferedReader br = new BufferedReader(new FileReader(f));
String line;
br.skip(60);
int charactersRead = 0;
while ((line = br.readLine()) != null && charactersRead < 12) {
text.append(line);
text.append('\n');
charactersRead++;
}
}
catch (IOException e) {
}
final String URL = text.toString();
TextView tv = (TextView)findViewById(R.id.textView2);
tv.setText(text);
Reading is working, but i can't read only 12 characters, it reads trough the end of file, don't know why.
I'm guessing your file is relatively short.
You're calling BufferedReader.readLine(), which in an attempt to be efficient is sucking up a big chunk of the file stream rather than going through it character-by-character.
If you want that finer control over what you read, it's probably worth using an InputStream implementation straight up.
i am trying to count the number characters in a text file which i have retrieved the SD card need some advice here am new to android programming
using this code to retrieve the text file from the sd card
//Find the directory for the SD Card using the API
//*Don't* hardcode "/sdcard"
File sdcard = Environment.getExternalStorageDirectory();
//Get the text file
File file = new File(sdcard,"file.txt");
//Read text from file
StringBuilder text = new StringBuilder();
try {
BufferedReader br = new BufferedReader(new FileReader(file));
String line;
while ((line = br.readLine()) != null) {
text.append(line);
text.append('\n');
}
}
catch (IOException e) {
//You'll need to add proper error handling here
}
//Find the view by its id
TextView tv = (TextView)findViewById(R.id.TextView01);
//Set the text
tv.setText(text);
Assuming that you have already opened the file and haven't encountered any exceptions in it, I would suggest using this, instead of what you're using:
try {
BufferedReader br = new BufferedReader(new FileReader(file));
String line="";
int c,counter=0;
while ((c = br.read()) != -1) {
line+=(char)c;
counter++;
}
text.append(line);
}
catch (IOException e) {
//You'll need to add proper error handling here
}
Here, I haven't used text.append("\n") because your file will already be having line break characters.
In the enc counter will be having the text count, including spaces and special characters like '\n'