1)Suppose we have a Button and a TextView in XML:

activity_main.xml

<Button
    android:id="@+id/btnGet"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="GET IMAGES" />
<TextView
    android:id="@+id/tvOne"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/btnGet"
    android:textSize="20dp" />

2)In your relative Java file,onCreate method will be:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    btnGet = (Button) findViewById(R.id.btnGet);
    listView = (ListView) findViewById(R.id.listView);
    tvOne = (TextView) findViewById(R.id.tvOne);
    btnGet.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
            intent.setType("*/*");
            intent.addCategory(Intent.CATEGORY_OPENABLE);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
                intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
                Toast.makeText(MainActivity.this, "EXTRA MULTIPLE ", Toast.LENGTH_LONG).show();
            }
            try {
                startActivityForResult(Intent.createChooser(intent, "Select a File to Upload"), REQUEST_PICK_FILE);
            } catch (android.content.ActivityNotFoundException ex) {
                ex.printStackTrace();
            }
        }
    });

Here as u can see we have startActivityForResult(Intent,RequestCode).We will override a method named as onActivityResult().

3)We will override a method here:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    if (requestCode == REQUEST_PICK_FILE) {
        if (resultCode == RESULT_OK) {
            Uri uri = intent.getData();
            String imgPath = getPath(uri, this);
            Log.i("path is....", imgPath);
            tvOne.setText(imgPath);
        }
    }
}

Here we have called a function getPath(uri,this),which will return Exact Path and we will save it in imgPath of type String.

4)Here we will define a function getPath(uri,this):

public static String getPath(Uri uri, Context context) {
    String[] projection = {MediaStore.Images.Media.DATA};
    Cursor cursor = context.getContentResolver().query(uri, projection, null, null, null);
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    return cursor.getString(column_index);
}

That's all.Hope it helps:)