Mega Code Archive
Create a new directory on external storage
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package app.test;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.widget.TextView;
import android.widget.Toast;
public class Test extends Activity {
private static final String FILENAME = "data.txt";
private static final String DNAME = "myfiles";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView tv = new TextView(this);
setContentView(tv);
File rootPath = new File(Environment.getExternalStorageDirectory(), DNAME);
if(!rootPath.exists()) {
rootPath.mkdirs();
}
File dataFile = new File(rootPath, FILENAME);
if(!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
Toast.makeText(this, "Cannot use storage.", Toast.LENGTH_SHORT).show();
finish();
return;
}
try {
FileOutputStream mOutput = new FileOutputStream(dataFile, false);
String data = "DATA";
mOutput.write(data.getBytes());
mOutput.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
FileInputStream mInput = new FileInputStream(dataFile);
byte[] data = new byte[128];
mInput.read(data);
mInput.close();
String display = new String(data);
tv.setText(display.trim());
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
dataFile.delete();
}
}
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