make directory in sdcard

manifes.xml

set uses-permission :android.permission.WRITE_EXTERNAL_STORAGE


package com.mkdir;

import java.io.File;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.os.StatFs;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;


public class mkdir extends Activity {
Button b;

TextView t;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

t = (TextView)findViewById(R.id.tv);
b= (Button) findViewById(R.id.Button01);
File dir = new File("/sdcard/new_dir");
try{
if(dir.mkdir()) {
System.out.println("Directory created");
t.setText("Directory created");
} else {
System.out.println("Directory is not created");
t.setText("Directory is not created");
}
}catch(Exception e){
e.printStackTrace();
}

b.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
File del = new File("/sdcard/new_dir");
boolean success = del.delete();
if (!success) {
System.out.println("Deletion of directory failed!");
}
}
});
}
}