I have a file in my devise called test.csv. when i click on that file is opened through my app.how to set default open with(dialog) option to my app in android?
above is the sample dailog.how to add my app to the dialog list?
I think you may want to read the csv file. you could get the csv file path. So see the following.
public static void readCSV(File file) {
BufferedReader reader = null;
StringBuilder stringBuilder = new StringBuilder();
try {
InputStreamReader isr = new InputStreamReader(new FileInputStream(file));// your csv file
reader = new BufferedReader(isr);
String line = null; // every time read one line
while ((line = reader.readLine()) != null) {
stringBuilder.append(line);
stringBuilder.append("\n");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
The stringBuilder.toString() is your csv file's content. Sorry for my English.
Related
I am trying to read in a file using the fstream. I am writing in C++11, but interfacing it with Java via JNI in Android Studio. It doesn't open the file for some reason. I am using a relative file path and I don't understand why it can't open the file. The file is named proverbs.txt. There aren't any discrepancies within the name like proverbs.txt.txt or anything like that.
Here's the code:
void storeProverbs() {
string path = "/Users/tenealaspencer/Desktop/proverbs.txt";
std::ifstream provInput(path.c_str(), std::ios::in);
//provInput.open("/Users/tenealaspencer/Desktop/proverbs.txt");
// opens the proverbs text file
equivInput.open("/Users/tenealaspencer/AndroidStudioProjects/example/app/src/main/cpp/stored.txt"); // opens the stored (English) proverbs text file
if (!provInput.is_open()) {
cout << "error ";
}
while (!provInput.eof()) // while not at the end of the proverbs file
{
getline(provInput, phrase); // read proverbs in line by line
getline(equivInput, storedProv); // read english proverbs in line by line
Never mind I just imported the file via Java using the following code:
try {
InputStream is = getAssets().open("stopwords.txt");
String line1;
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
while((line1 = reader.readLine()) != null) //
{
try {
byte[] utf8Bytes = line1.getBytes("UTF8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
storeStopWords(line1);
}
}
catch (IOException e) {
e.printStackTrace();
}
try {
InputStream is = getAssets().open("proverbs.txt");
InputStream iz = getAssets().open("stored.txt");
String line;
String line2; //= new String ("");
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
BufferedReader reader2 = new BufferedReader(new InputStreamReader(iz));
while((line = reader.readLine()) != null && (line2 = reader2.readLine()) != null ) //
{
try {
byte[] utf8Bytes = line.getBytes("UTF8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
storeProverbs(line,line2);
}
}
catch (IOException e) {
e.printStackTrace();
}
I read somewhere that JNA doesn't support the fstream library or something like that. In any case it works.
I want to know how to capture logs with in mobile phone
Does this network logs can be used to measure page load time ?
I tried capturing device logs using adb logcat in desktop but I want to capture those logs with in device
Assuming your logs are located in a String file, you can save them to a text file like this:
private void saveLogsToFile(String logs) {
try {
OutputStreamWriter out = new OutputStreamWriter(openFileOutput("saved_logs.txt", Context.MODE_PRIVATE));
out.write(logs);
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
And then read them back from the file like this:
private String readSavedLogs() {
String logs = "";
try {
InputStream inputStream = openFileInput("saved_logs.txt");
if(inputStream != null) {
InputStreamReader in = new InputStreamReader(inputStream);
BufferedReader bufferedReader = new BufferedReader(in);
String line;
StringBuilder stringBuilder = new StringBuilder();
while((line = bufferedReader.readLine()) != null) {
stringBuilder.append(line).append("\n");
}
inputStream.close();
logs = stringBuilder.toString();
}
} catch (IOException e) {
e.printStackTrace();
}
return logs;
}
I am trying to read a CSV file using BufferedReader in android. My program works perfectly fine in Java but when I try read those data from Android following error I get.
01-31 17:09:58.466: W/System.err(15912): java.io.FileNotFoundException:
/Users/sabbir/Documents/workspace/TestCSV/src/file/input.csv: open failed: ENOENT (No
such file or directory)
Following code I am using here.
public double getLongitudes() {
BufferedReader br = null;
String line = "";
String cvsSplitBy = ";";
String[] nextLine;
double longitudes = 0;
try {
br = new BufferedReader(
new FileReader(
"/Users/sabbir/Documents/workspace/TestCSV/src/file/input.csv"));
while ((line = br.readLine()) != null) {
// use comma as separator
String[] country = line.split(cvsSplitBy);
longitudes = Double.parseDouble(country[5]);
Log.d("worked", "worked");
// System.out.println("Latitude " + longitudes);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
System.out.println("Done");
return (longitudes);
}}
Any idea why its happening ??
The path /Users/sabbir/Documents/workspace/TestCSV/src/file/input.csv is invalid. This looks like the path to a file on your computer rather than your Android device. You need to push the file to your device or your emulated device and access it from there. Even the Android emulator will not read files directly from your computer's filesystem.
Proper way to store your CSV in Android is:
("/sdcard/Android/data/filename.csv");
The .csv file needs to be in your project resources. You can copy the file into assets folder and read it this way
AssetInputStream asset_stream = (AssetInputStream)getAssets().open("input.csv");
InputStreamReader reader = new InputStreamReader(asset_stream);
BufferedReader br = new BufferedReader(reader);
This is one method that has worked for me before.
Another method would be to put the file into res/raw folder and access it
InputStream file = getResources().openRawResource(R.raw.inputfile);
You can also refer to https://stackoverflow.com/a/3851429/3092829
Hope this helps!
So i have solved my problem.
public class ReadCSV {
BufferedReader br = null;
String line = "";
String cvsSplitBy = ";";
String[] nextLine;
String[] country;
AssetInputStream asset_stream = null;
public String[] getLatitude() {
try {
asset_stream = (AssetInputStream) MainActivity.getContext()
.getAssets().open("Input.csv");
} catch (IOException e) {
e.printStackTrace();
}
InputStreamReader reader = new InputStreamReader(asset_stream);
Log.d("logg", "log" + reader);
br = new BufferedReader(reader);
Log.d("logg", "log" + br);
try {
while ((line = br.readLine()) != null) {
country = line.split(cvsSplitBy);
}
} catch (NumberFormatException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return country;
}
As you can see I am trying to get my latitude by returning it through country. But when I trying get it from another fragment class through this,
String[] lat;
lat = csv.getLatitude();
Log.d("", "" + lat);
Why I don't get latitude back ?
I want to save my app logcat events in a text file on sd card.
my alarming app work properly in my and my friends devices, but other have error on my app.
for example they say alarms in app are in wrong time, but i dont see this error in my and my friends devices.
Because of this issue and other issues, i want save all events logcat related my app, atomatically. so they send log file to me to solve issues.
how can i do this?
thanks
sorry for my bad english
You can get logcat via the following:
static final int BUFFER_SIZE = 1024;
public String getLogCat() {
String[] logcatArgs = new String[] {"logcat", "-v", "time"};
Process logcatProc = null;
try {
logcatProc = Runtime.getRuntime().exec(logcatArgs);
}
catch (IOException e) {
return null;
}
BufferedReader reader = null;
String response = null;
try {
String separator = System.getProperty("line.separator");
StringBuilder sb = new StringBuilder();
reader = new BufferedReader(new InputStreamReader(logcatProc.getInputStream()), BUFFER_SIZE);
String line;
while ((line = reader.readLine()) != null) {
sb.append(line);
sb.append(separator);
}
response = sb.toString();
}
catch (IOException e) {
}
finally {
if (reader != null) {
try {
reader.close();
}
catch (IOException e) {}
}
}
return response;
}
You can then save this String to the sdcard.
You can get logcat via the following:
static final int BUFFER_SIZE = 1024;
public String getLogCat() {
String[] logcatArgs = new String[] {"logcat", "-v", "time"};
Process logcatProc = null;
try {
logcatProc = Runtime.getRuntime().exec(logcatArgs);
}
catch (IOException e) {
return null;
}
BufferedReader reader = null;
String response = null;
try {
String separator = System.getProperty("line.separator");
StringBuilder sb = new StringBuilder();
reader = new BufferedReader(new InputStreamReader(logcatProc.getInputStream()), BUFFER_SIZE);
String line;
while ((line = reader.readLine()) != null) {
sb.append(line);
sb.append(separator);
}
response = sb.toString();
}
catch (IOException e) {
}
finally {
if (reader != null) {
try {
reader.close();
}
catch (IOException e) {}
}
}
return response;
}
You can then save this String to the sdcard.
This answer from "Dororo" didn't work for me since it always got stuck in the while due to to many lines, but i have no idea how to fix that.
the logcat will block for reading new logs unless you specify the '-d' arg.
try
String[] logcatArgs = new String[] {"logcat", "-d", "-v", "time"};
This type of functionality is already implemented by the ACRA Android library. The library detects crashes, and send the crash information to either a Google Docs spreadsheet, or your own destination.
Execute within a thread to avoid ANRs
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
android reading from a text file
So I need to load text, but I don't know how :( To save text I'm doing this
File logFile = new File("sdcard/data/agenda.file");
if (!logFile.exists())
{
try
{
logFile.createNewFile();
}
catch (IOException e)
{
e.printStackTrace();
}
}
try
{
//BufferedWriter for performance, true to set append to file flag
BufferedWriter buf = new BufferedWriter(new FileWriter(logFile, true));
buf.append(editText1.getText());
buf.newLine();
buf.close();
}
catch (IOException e)
{
e.printStackTrace();
}
So, how to load it back by button tap?
To read content of file, for example *.txt - do this...
private String GetPhoneAddress() {
File file = new File(Environment.getExternalStorageDirectory() + "/reklama/tck.txt");
if (!file.exists()){
String line = "Need to add smth";
return line;
}
String line = null;
//Read text from file
//StringBuilder text = new StringBuilder();
try {
BufferedReader br = new BufferedReader(new FileReader(file));
line = br.readLine();
}
catch (IOException e) {
//You'll need to add proper error handling here
}
return line;
}
Then, from activite to set to textview - just do smthing like
final TextView tvphone = (TextView) findViewById(R.id.saved_phone);
String saved_phone = GetPhoneAddress();
if (saved_phone.length()>0){
tvphone.setText(saved_phone);
}
This function will read your whole file, and set it to the parameter TextView as text, if this is what you want. Your code is trying to write the TextViews content to a file, it's not reading it.
public void loadToTextView(TextView textView) throws Exception
{
String path = Environment.getExternalStorageDirectory().getAbsolutePath();
File file = new File(path, "filename.file");
textView.setText(new Scanner(file).useDelimiter("\\Z").next());
}
Be careful, you will need to handle the Exception, that this function might throw.
This method will read each line into a StringBuffer.
Then just call setText(contentsOfFile) on your TextView.
BufferedReader fileReader = new BufferedReader(new FileReader("/mnt/sdcard/agenda.file"));
StringBuilder strBuilder = new StringBuilder();
String line;
while((line = fileReader.readLine()) != null)
{
strBuilder.append(line);
}
fileReader.close();
strBuilder.trimToSize();
String contentsOfFile = strBuilder.toString();